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1

Impact of Tactical and Strategic Weather Avoidance on Separation Assurance  

NASA Technical Reports Server (NTRS)

The ability to keep flights away from weather hazards while maintaining aircraft-to-aircraft separation is critically important. The Advanced Airspace Concept is an automation concept that implements a ground-based strategic conflict resolution algorithm for management of aircraft separation. The impact of dynamic and uncertain weather avoidance on this concept is investigated. A strategic weather rerouting system is integrated with the Advanced Airspace Concept, which also provides a tactical weather avoidance algorithm, in a fast time simulation of the Air Transportation System. Strategic weather rerouting is used to plan routes around weather in the 20 minute to two-hour time horizon. To address forecast uncertainty, flight routes are revised at 15 minute intervals. Tactical weather avoidance is used for short term trajectory adjustments (30 minute planning horizon) that are updated every minute to address any weather conflicts (instances where aircraft are predicted to pass through weather cells) that are left unresolved by strategic weather rerouting. The fast time simulation is used to assess the impact of tactical weather avoidance on the performance of automated conflict resolution as well as the impact of strategic weather rerouting on both conflict resolution and tactical weather avoidance. The results demonstrate that both tactical weather avoidance and strategic weather rerouting increase the algorithm complexity required to find aircraft conflict resolutions. Results also demonstrate that tactical weather avoidance is prone to higher airborne delay than strategic weather rerouting. Adding strategic weather rerouting to tactical weather avoidance reduces total airborne delays for the reported scenario by 18% and reduces the number of remaining weather violations by 13%. Finally, two features are identified that have proven important for strategic weather rerouting to realize these benefits; namely, the ability to revise reroutes and the use of maneuvers that start far ahead of encountering a weather cell when rerouting around weather.

Refai, Mohamad S.; Windhorst, Robert

2011-01-01

2

Tactical Versus Strategic Behavior: General Aviation Piloting in Convective Weather Scenarios  

NASA Technical Reports Server (NTRS)

We commonly describe environments and behavioral responses to environmental conditions as 'tactical' and 'strategic.' However theoretical research defining relevant environmental characteristics is rare, as are empirical investigations that would inform such theory. This paper discusses General Aviation (GA) pilots' descriptions of tactical/strategic conditions with respect to weather flying, and evaluates their ratings along a tactical/strategic scale in response to real convective weather scenarios experienced during a flight experiment with different weather information cues. Perceived risk was significantly associated with ratings for all experimental conditions. In addition, environmental characteristics were found to be predictive of ratings for Traditional IMC (instrument meteorological conditions), i.e., aural weather information only, and Traditional VMC (visual meteorological conditions), i.e., aural information and an external view. The paper also presents subjects' comments regarding use of Graphical Weather Information Systems (GWISs) to support tactical and strategic weather flying decisions and concludes with implications for the design and use of GWISs.

Latorella, Kara A.; Chamberlain, James P.

2002-01-01

3

Flight Deck Weather Avoidance Decision Support: Implementation and Evaluation  

NASA Technical Reports Server (NTRS)

Weather related disruptions account for seventy percent of the delays in the National Airspace System (NAS). A key component in the weather plan of the Next Generation of Air Transportation System (NextGen) is to assimilate observed weather information and probabilistic forecasts into the decision process of flight crews and air traffic controllers. In this research we explore supporting flight crew weather decision making through the development of a flight deck predicted weather display system that utilizes weather predictions generated by ground-based radar. This system integrates and presents this weather information, together with in-flight trajectory modification tools, within a cockpit display of traffic information (CDTI) prototype. that the CDTI features 2D and perspective 3D visualization models of weather. The weather forecast products that we implemented were the Corridor Integrated Weather System (CIWS) and the Convective Weather Avoidance Model (CWAM), both developed by MIT Lincoln Lab. We evaluated the use of CIWS and CWAM for flight deck weather avoidance in two part-task experiments. Experiment 1 compared pilots' en route weather avoidance performance in four weather information conditions that differed in the type and amount of predicted forecast (CIWS current weather only, CIWS current and historical weather, CIWS current and forecast weather, CIWS current and forecast weather and CWAM predictions). Experiment 2 compared the use of perspective 3D and 21/2D presentations of weather for flight deck weather avoidance. Results showed that pilots could take advantage of longer range predicted weather forecasts in performing en route weather avoidance but more research will be needed to determine what combinations of information are optimal and how best to present them.

Wu, Shu-Chieh; Luna, Rocio; Johnson, Walter W.

2013-01-01

4

High-energy laser tactical decision aid (HELTDA) for mission planning and predictive avoidance  

NASA Astrophysics Data System (ADS)

This study demonstrates the development of a high energy laser tactical decision aid (HELTDA) by the AFIT/CDE for mission planning High Energy Laser (HEL) weapon system engagements as well as centralized, decentralized, or hybrid predictive avoidance (CPA/DPA/HPA) assessments. Analyses of example HEL mission engagements are described as well as how mission planners are expected to employ the software. Example HEL engagement simulations are based on geographic location and recent/current atmospheric weather conditions. The atmospheric effects are defined through the AFIT/CDE Laser Environmental Effects Definition and Reference (LEEDR) model or the High Energy Laser End-to-End Operational Simulation (HELEEOS) model upon which the HELTDA is based. These models enable the creation of vertical profiles of temperature, pressure, water vapor content, optical turbulence, and atmospheric particulates and hydrometeors as they relate to line-by-line layer extinction coefficient magnitude at wavelengths from the UV to the RF. Seasonal and boundary layer variations (summer/winter) and time of day variations for a range of relative humidity percentile conditions are considered to determine optimum efficiency in a specific environment. Each atmospheric particulate/hydrometeor is evaluated based on its wavelength-dependent forward and off-axis scattering characteristics and absorption effects on the propagating environment to and beyond the target. In addition to realistic vertical profiles of molecular and aerosol absorption and scattering, correlated optical turbulence profiles in probabilistic (percentile) format are included. Numerical weather model forecasts are incorporated in the model to develop comprehensive understanding of HEL weapon system performance.

Burley, Jarred L.; Fiorino, Steven T.; Randall, Robb M.; Bartell, Richard J.; Cusumano, Salvatore J.

2012-06-01

5

In the eye of the tiger: predator avoidance tactics differ among life-history stages of an ambystomatid salamander  

Microsoft Academic Search

Loss of life to a predator obviously has a negative impact on an individual's fitness, and so selection is expected to favour tactics in prey that enable them to avoid encounters with predators (our focus here) and\\/or survive such encounters if they occur. While much is known about species differences in such tactics, ontogenetic changes within species have been less

J. A. Fronzuto; P. A. Verrell

2007-01-01

6

Multiple Aircraft Deconflicted Path Planning with Weather Avoidance Constraints  

E-print Network

Multiple Aircraft Deconflicted Path Planning with Weather Avoidance Constraints Jessica J We present a model predictive control based algorithm for aircraft motion planning that will apply to converging flows of aircraft going through convective weather in the en route airspace. The cost function

Sastry, S. Shankar

7

Dynamic Weather Routes: A Weather Avoidance Concept for Trajectory-Based Operations  

NASA Technical Reports Server (NTRS)

The integration of convective weather modeling with trajectory automation for conflict detection, trial planning, direct routing, and auto resolution has uncovered a concept that could help controllers, dispatchers, and pilots identify improved weather routes that result in significant savings in flying time and fuel burn. Trajectory automation continuously and automatically monitors aircraft in flight to find those that could potentially benefit from improved weather reroutes. Controllers, dispatchers, and pilots then evaluate reroute options to assess their suitability given current weather and traffic. In today's operations aircraft fly convective weather avoidance routes that were implemented often hours before aircraft approach the weather and automation does not exist to automatically monitor traffic to find improved weather routes that open up due to changing weather conditions. The automation concept runs in real-time and employs two keysteps. First, a direct routing algorithm automatically identifies flights with large dog legs in their routes and therefore potentially large savings in flying time. These are common - and usually necessary - during convective weather operations and analysis of Fort Worth Center traffic shows many aircraft with short cuts that indicate savings on the order of 10 flying minutes. The second and most critical step is to apply trajectory automation with weather modeling to determine what savings could be achieved by modifying the direct route such that it avoids weather and traffic and is acceptable to controllers and flight crews. Initial analysis of Fort Worth Center traffic suggests a savings of roughly 50% of the direct route savings could be achievable.The core concept is to apply trajectory automation with convective weather modeling in real time to identify a reroute that is free of weather and traffic conflicts and indicates enough time and fuel savings to be considered. The concept is interoperable with today's integrated FMS/datalink. Auxiliary(lat/long) waypoints define a minimum delay reroute between current position and a downstream capture fix beyond the weather. These auxiliary waypoints can be uplinked to equipped aircraft and auto-loaded into the FMS. Alternatively, for unequipped aircraft, auxiliary waypoints can be replaced by nearby named fixes, but this could reduce potential savings. The presentation includes an overview of the automation approach and focuses on several cases in terms of potential savings, reroute complexity, best auxiliary waypoint solution vs. named fix solution, and other metrics.

McNally, B. David; Love, John

2011-01-01

8

Aircrew decision-making behavior in hazardous weather avoidance  

NASA Technical Reports Server (NTRS)

A study was conducted to assess the situation awareness and decision-making behavior of aircrews in a line-oriented simulation of the microburst/windshear encounter which occurred on July 11, 1988, at the Denver Stapleton Airport as affected by the manner in which information available at different times and in different forms. Intracrew communications and approach-to-land decisions were evaluated with conventional ATC communications and with automated cockpit alerting and display of weather information. It was found that the avoidance dicision-making performance of aircrews provided only with conventional ATC transmissions of weather information was significantly less efficient than the performance of crews provided with a visual display of microburst events.

Lee, Alfred T.

1991-01-01

9

Young men’s use of aggressive tactics to avoid condom use: A test of a theoretical model  

PubMed Central

Although research has demonstrated that men’s aggression against women and inconsistent condom use are related phenomena, it is little is known as to what factors increase risk for aggression to avoid condom use. The present article tests a theory-based model of condom avoidance through sexual aggression. Adult male participants (N=289) were recruited nationally through online advertisements. Aggressive tactics to avoid condom use was measured using an adapted version of the revised Sexual Experiences Survey (Abbey et al., 2005) and assessed a variety of aggressive behaviors spanning coercion to physical force. 100 participants (35.3%) reported at least one instance of coercion or aggression to avoid using a condom. Structural equation modeling indicated that, attitudes towards women, inconsistent condom use, and number of sexual partners were significant predictors of aggressive tactics to avoid condom use. A better understanding of the attitudinal and behavioral pathways through which men avoid condom use through aggressive and coercive means will ultimately result in improved education and prevention efforts for at-risk men and women. PMID:23139623

Davis, Kelly Cue; Logan-Greene, Patricia

2011-01-01

10

Automated Conflict Resolution, Arrival Management and Weather Avoidance for ATM  

NASA Technical Reports Server (NTRS)

The paper describes a unified solution to three types of separation assurance problems that occur in en-route airspace: separation conflicts, arrival sequencing, and weather-cell avoidance. Algorithms for solving these problems play a key role in the design of future air traffic management systems such as NextGen. Because these problems can arise simultaneously in any combination, it is necessary to develop integrated algorithms for solving them. A unified and comprehensive solution to these problems provides the foundation for a future air traffic management system that requires a high level of automation in separation assurance. The paper describes the three algorithms developed for solving each problem and then shows how they are used sequentially to solve any combination of these problems. The first algorithm resolves loss-of-separation conflicts and is an evolution of an algorithm described in an earlier paper. The new version generates multiple resolutions for each conflict and then selects the one giving the least delay. Two new algorithms, one for sequencing and merging of arrival traffic, referred to as the Arrival Manager, and the other for weather-cell avoidance are the major focus of the paper. Because these three problems constitute a substantial fraction of the workload of en-route controllers, integrated algorithms to solve them is a basic requirement for automated separation assurance. The paper also reviews the Advanced Airspace Concept, a proposed design for a ground-based system that postulates redundant systems for separation assurance in order to achieve both high levels of safety and airspace capacity. It is proposed that automated separation assurance be introduced operationally in several steps, each step reducing controller workload further while increasing airspace capacity. A fast time simulation was used to determine performance statistics of the algorithm at up to 3 times current traffic levels.

Erzberger, H.; Lauderdale, Todd A.; Chu, Yung-Cheng

2010-01-01

11

Young Men's Aggressive Tactics to Avoid Condom Use: A Test of a Theoretical Model  

ERIC Educational Resources Information Center

Although research has demonstrated that men's aggression against women and inconsistent condom use are related phenomena, little is known about what factors increase risk for aggression to avoid condom use. The present article tests a theory-based model of condom avoidance through use of sexual aggression. Adult male participants (N = 289) were…

Davis, Kelly Cue; Logan-Greene, Patricia

2012-01-01

12

Tactics, effectiveness and avoidance of mate guarding in the blue-footed booby ( Sula nebouxii )  

Microsoft Academic Search

We examined the dynamics and avoidance of mate guarding, by males and females, in the blue-footed booby, in which the two social mates are usually simultaneously present on the territory but each of them is unmonitored by the other for one-quarter of its time. Both sexes were promiscuous and liable to switch mates. Cuckolded individuals did not increase their overall

Diana Pérez-Staples; Hugh Drummond

2005-01-01

13

Weather Avoidance Using Route Optimization as a Decision Aid: An AWIN Topical Study. Phase 1  

NASA Technical Reports Server (NTRS)

The aviation community is faced with reducing the fatal aircraft accident rate by 80 percent within 10 years. This must be achieved even with ever increasing, traffic and a changing National Airspace System. This is not just an altruistic goal, but a real necessity, if our growing level of commerce is to continue. Honeywell Technology Center's topical study, "Weather Avoidance Using Route Optimization as a Decision Aid", addresses these pressing needs. The goal of this program is to use route optimization and user interface technologies to develop a prototype decision aid for dispatchers and pilots. This decision aid will suggest possible diversions through single or multiple weather hazards and present weather information with a human-centered design. At the conclusion of the program, we will have a laptop prototype decision aid that will be used to demonstrate concepts to industry for integration into commercialized products for dispatchers and/or pilots. With weather a factor in 30% of aircraft accidents, our program will prevent accidents by strategically avoiding weather hazards in flight. By supplying more relevant weather information in a human-centered format along with the tools to generate flight plans around weather, aircraft exposure to weather hazards can be reduced. Our program directly addresses the NASA's five year investment areas of Strategic Weather Information and Weather Operations (simulation/hazard characterization and crew/dispatch/ATChazard monitoring, display, and decision support) (NASA Aeronautics Safety Investment Strategy: Weather Investment Recommendations, April 15, 1997). This program is comprised of two phases, Phase I concluded December 31, 1998. This first phase defined weather data requirements, lateral routing algorithms, an conceptual displays for a user-centered design. Phase II runs from January 1999 through September 1999. The second phase integrates vertical routing into the lateral optimizer and combines the user interface into a prototype software testbed. Phase II concludes with a dispatcher and pilot evaluation of the route optimizer decision aid. This document describes work completed in Phase I in contract with NASA Langley August 1998 - December 1998. This report includes: (1) Discuss how weather hazards were identified in partnership with experts, and how weather hazards were prioritized; (2) Static representations of display layouts for integrated planning function (3) Cost function for the 2D route optimizer; (4) Discussion of the method for obtaining, access to raw data of, and the results of the flight deck user information requirements definition; (5) Itemized display format requirements identified for representing weather hazards in a route planning aid.

1998-01-01

14

Evaluation of a Dispatcher's Route Optimization Decision Aid to Avoid Aviation Weather Hazards  

NASA Technical Reports Server (NTRS)

This document describes the results and analysis of the formal evaluation plan for the Honeywell software tool developed under the NASA AWIN (Aviation Weather Information) 'Weather Avoidance using Route Optimization as a Decision Aid' project. The software tool aims to provide airline dispatchers with a decision aid for selecting optimal routes that avoid weather and other hazards. This evaluation compares and contrasts route selection performance with the AWIN tool to that of subjects using a more traditional dispatcher environment. The evaluation assesses gains in safety, in fuel efficiency of planned routes, and in time efficiency in the pre-flight dispatch process through the use of the AWIN decision aid. In addition, we are interested in how this AWIN tool affects constructs that can be related to performance. The construct of Situation Awareness (SA), workload, trust in an information system, and operator acceptance are assessed using established scales, where these exist, as well as through the evaluation of questionnaire responses and subject comments. The intention of the experiment is to set up a simulated operations area for the dispatchers to work in. They will be given scenarios in which they are presented with stored company routes for a particular city-pair and aircraft type. A diverse set of external weather information sources is represented by a stand-alone display (MOCK), containing the actual historical weather data typically used by dispatchers. There is also the possibility of presenting selected weather data on the route visualization tool. The company routes have not been modified to avoid the weather except in the case of one additional route generated by the Honeywell prototype flight planning system. The dispatcher will be required to choose the most appropriate and efficient flight plan route in the displayed weather conditions. The route may be modified manually or may be chosen from those automatically displayed.

Dorneich, Michael C.; Olofinboba, Olu; Pratt, Steve; Osborne, Dannielle; Feyereisen, Thea; Latorella, Kara

2003-01-01

15

Super-resolution technologies for all-weather sense and avoidance (SAA) radar  

NASA Astrophysics Data System (ADS)

The sense and avoidance (SAA) and due-regard radar systems have strict requirements on size, weight and power (SWaP) and target localization accuracies. Also, the multi-mission capabilities with both weather and hard targets are critical to the survivability of unmanned aerial vehicles (UAV) in the next generation national airspace. The aperture limitations of the aircraft sensor installation, however, have prevented large antennas/arrays to be used. The tradeoffs among frequencies, resolutions and detection range/accuracies have not been fully addressed. Innovative concepts of overcoming the aperture limitation by using a special type of super-resolution technology are introduced. The first technique is based on a combination of thinned antenna array, an extension to the traditional Multiple Signal Classification (MUSIC) technique, and applying a two-dimensional sidelobe mitigation technique. To overcome the degradation of MUSIC-type of approach due to coherent radar signals, a special waveform optimization procedure is used. The techniques for mitigating artifacts due to "thinned" array are also introduced. Simulated results of super-resolution techniques are discussed and evaluated, and the capability of separating multiple targets within aperture-constrained beamwidth is demonstrated. Moreover, the potential capabilities of autonomous weather hazard avoidance are also analyzed.

Zhang, Yan Rockee; Li, Zhengzheng; Wang, Shang; Pan, Yu; Suarez, Hernan

2011-06-01

16

Mapping lessons from ants to free flight: an ant-based weather avoidance algorithm in free flight airspace  

NASA Astrophysics Data System (ADS)

The continuing growth of air traffic worldwide motivates the need for new approaches to air traffic management that are more flexible both in terms of traffic volume and weather. Free Flight is one such approach seriously considered by the aviation community. However the benefits of Free Flight are severely curtailed in the convective weather season when weather is highly active, leading aircrafts to deviate from their optimal trajectories. This paper investigates the use of ant colony optimization in generating optimal weather avoidance trajectories in Free Flight airspace. The problem is motivated by the need to take full advantage of the airspace capacity in a Free Flight environment, while maintaining safe separation between aircrafts and hazardous weather. The experiments described herein were run on a high fidelity Free Flight air traffic simulation system which allows for a variety of constraints on the computed routes and accurate measurement of environments dynamics. This permits us to estimate the desired behavior of an aircraft, including avoidance of changing hazardous weather patterns, turn and curvature constraints, and the horizontal separation standard and required time of arrival at a pre determined point, and to analyze the performance of our algorithm in various weather scenarios. The proposed Ant Colony Optimization based weather avoidance algorithm was able to find optimum weather free routes every time if they exist. In case of highly complex scenarios the algorithm comes out with the route which requires the aircraft to fly through the weather cells with least disturbances. All the solutions generated were within flight parameters and upon integration with the flight management system of the aircraft in a Free Flight air traffic simulator, successfully negotiated the bad weather.

Alam, Sameer; Abbass, Hussein A.; Barlow, Michael; Lindsay, Peter

2005-12-01

17

Evaluation of High Density Air Traffic Operations with Automation for Separation Assurance, Weather Avoidance and Schedule Conformance  

NASA Technical Reports Server (NTRS)

In this paper we discuss the development and evaluation of our prototype technologies and procedures for far-term air traffic control operations with automation for separation assurance, weather avoidance and schedule conformance. Controller-in-the-loop simulations in the Airspace Operations Laboratory at the NASA Ames Research Center in 2010 have shown very promising results. We found the operations to provide high airspace throughput, excellent efficiency and schedule conformance. The simulation also highlighted areas for improvements: Short-term conflict situations sometimes resulted in separation violations, particularly for transitioning aircraft in complex traffic flows. The combination of heavy metering and growing weather resulted in an increased number of aircraft penetrating convective weather cells. To address these shortcomings technologies and procedures have been improved and the operations are being re-evaluated with the same scenarios. In this paper we will first describe the concept and technologies for automating separation assurance, weather avoidance, and schedule conformance. Second, the results from the 2010 simulation will be reviewed. We report human-systems integration aspects, safety and efficiency results as well as airspace throughput, workload, and operational acceptability. Next, improvements will be discussed that were made to address identified shortcomings. We conclude that, with further refinements, air traffic control operations with ground-based automated separation assurance can routinely provide currently unachievable levels of traffic throughput in the en route airspace.

Prevot, Thomas; Mercer, Joey S.; Martin, Lynne Hazel; Homola, Jeffrey R.; Cabrall, Christopher D.; Brasil, Connie L.

2011-01-01

18

Weathering  

NSDL National Science Digital Library

This course handout covers the processes and effects of weathering. The purpose of this handout is to contrast weathering and erosion, contrast and discuss chemical and mechanical weathering, list the products resulting from the chemical weathering of igneous rocks, and list and discuss the factors that influence the type and rate of rock weathering. Many photographs accompany this summary which depict weathered landscapes. Links are provided to the online Physical Geology resources at Georgia Perimeter College.

Pamela Gore

1995-08-29

19

Design and Evaluation of a Dynamic Programming Flight Routing Algorithm Using the Convective Weather Avoidance Model  

NASA Technical Reports Server (NTRS)

The optimization of traffic flows in congested airspace with varying convective weather is a challenging problem. One approach is to generate shortest routes between origins and destinations while meeting airspace capacity constraint in the presence of uncertainties, such as weather and airspace demand. This study focuses on development of an optimal flight path search algorithm that optimizes national airspace system throughput and efficiency in the presence of uncertainties. The algorithm is based on dynamic programming and utilizes the predicted probability that an aircraft will deviate around convective weather. It is shown that the running time of the algorithm increases linearly with the total number of links between all stages. The optimal routes minimize a combination of fuel cost and expected cost of route deviation due to convective weather. They are considered as alternatives to the set of coded departure routes which are predefined by FAA to reroute pre-departure flights around weather or air traffic constraints. A formula, which calculates predicted probability of deviation from a given flight path, is also derived. The predicted probability of deviation is calculated for all path candidates. Routes with the best probability are selected as optimal. The predicted probability of deviation serves as a computable measure of reliability in pre-departure rerouting. The algorithm can also be extended to automatically adjust its design parameters to satisfy the desired level of reliability.

Ng, Hok K.; Grabbe, Shon; Mukherjee, Avijit

2010-01-01

20

Weather  

NSDL National Science Digital Library

What are the different types of weather? In this project you will compare different types of weather by drawing pictures and making it into a flip book. First you will begin by learning about the different types of weather. Read about each topic. Then get together with your partner and draw a picture of each type of weather. 1. Thunder storm Thunder storm Thunder storm Kids 2. Lightning Lightning Lightning picture 3. Tornado Tornadoes Tornado Kids 4. ...

Jennie, Miss

2009-10-22

21

New Technologies for Weather Accident Prevention  

NASA Technical Reports Server (NTRS)

Weather is a causal factor in thirty percent of all aviation accidents. Many of these accidents are due to a lack of weather situation awareness by pilots in flight. Improving the strategic and tactical weather information available and its presentation to pilots in flight can enhance weather situation awareness and enable avoidance of adverse conditions. This paper presents technologies for airborne detection, dissemination and display of weather information developed by the National Aeronautics and Space Administration (NASA) in partnership with the Federal Aviation Administration (FAA), National Oceanic and Atmospheric Administration (NOAA), industry and the research community. These technologies, currently in the initial stages of implementation by industry, will provide more precise and timely knowledge of the weather and enable pilots in flight to make decisions that result in safer and more efficient operations.

Stough, H. Paul, III; Watson, James F., Jr.; Daniels, Taumi S.; Martzaklis, Konstantinos S.; Jarrell, Michael A.; Bougue, Rodney K.

2005-01-01

22

Weathering  

NSDL National Science Digital Library

This interactive Flash resource provides information regarding physical and chemical weathering at an introductory physical geology or Earth science level. It includes animations, diagrams, and supplementary information and is suitable for high school or undergraduate students.

Smoothstone; Mifflin, Houghton

23

Weather  

NSDL National Science Digital Library

In the project you will learn about thunderstorms and tornadoes and play a weather matching game. What exactly are thunderstorms and tornadoes? Use your T- chart to explain some facts about a thunderstorm and a tornado as we review each. T-Chart Begin by reviewing what a thunderstorm is and how they form. Thunderstorm information What is a thunderstorm? What are thunderstorms most likely to occur? What causes thunder? Next review what a tornado ...

Caitlin, Ms.

2009-10-21

24

Sun avoidance in the yellow baboons (Papio cynocephalus cynocephalus) of Ruaha National Park, Tanzania. Variations with season, behavior and weather  

NASA Astrophysics Data System (ADS)

Do free-ranging baboons avoid traveling towards the sun? Sun avoidance, in addition to resource and predator locations, may influence troop movement and non-random use of the home range. This paper investigates how sun avoidance, as measured by facial exposure to sunlight, influences directional choices. It hypothesizes that baboons should avoid the sun in the hot, dry season and show indifference to it in the cool, lush season. This paper also hypothesizes that baboons employ sun-avoidance behaviors more while they forage or travel to resting sites than when they travel to foraging sites or engage in active social behaviors; lastly this paper hypothesizes that sun altitude, temperature, humidity, and cloud cover influence sun-avoidance behavior. Using focal-animal techniques on 21 males from free-ranging baboon troops, I collected locational data, accurate to within 1.6 m, over 15 months. I calculated the difference between baboon bearings and the sun's azimuth in angular degrees. Both linear and circular statistics indicate that baboons put significantly (P<0.01) more than 90° between their bearing and the sun's azimuth under certain conditions. Contrary to hypotheses based on the detrimental effects of insolation, baboons in the cool, lush season avoid the sun, while baboons in the hot, dry season do not. In the lush season, the extent to which baboons avoid the sun does not depend on their other behaviors. Dry-season baboons demonstrate stronger sun avoidance while resting than when engaged in other behaviors. Finally, in the dry season, temperature drives sun avoidance; humidity drives it in the lush season.

Pochron, Sharon T.

25

Tactics of Manipulation  

Microsoft Academic Search

Manipulation is one means by which environments are altered to correspond to characteristics of individuals. We conducted two studies to identify the manipulation tactics that people use to elicit and terminate the actions of others. Factor analyses of four instruments revealed six types of tactics: charm, silent treatment, coercion, reason, regression, and debasement. Tactics of manipulation showed strong individual difference

David M. Buss; Mary Gomes; Dolly S. Higgins; Karen Lauterbach

1987-01-01

26

mm-wave component tradeoffs for tactical systems  

Microsoft Academic Search

Future warfare scenarios include land and sea attacks occurring during weather conditions which will place defensive air support at a maximum disadvantage. In adverse weather, tactical air strike effectiveness can be severely reduced when the visual meteorological range falls below 2000 meters. Continuing research and development of the millimeter wavelength region, 30 to 300 GHz, is being carried out for

C. R. Seashore; D. R. Singh

1982-01-01

27

Tactical miniature crystal oscillator  

Microsoft Academic Search

The intended use for the Tactical Miniature Crystal Oscillator (TMXO) is as a reference frequency source in advanced tactical communications systems and in time ordered navigational systems. This effort, conducted in 2 phases, was a continuation by the authors of a previous study which defined particular problem areas. The TMXO as configured in this effort is an evacuated enclosure containing

H. M. Greenhouse; R. L. McGill; W. Fefel; H. Jackson; D. Brown; R. Bryan; T. Hawkins

1981-01-01

28

The DLR Project - Weather & Flying  

NASA Astrophysics Data System (ADS)

A project is introduced which aims at (a) providing timely, tailored and concise meteorological information especially for adverse weather as precisely as possible for air traffic control and management, airline operating centres, pilots, and airports, and (b) building automated flight control systems and evasion-manoeuvre methods to minimise the impact of adverse wind and wake conditions on the flight performance of an aircraft. Today ATM and ATC most of the time only react on adverse weather when the disruption has already happened or is just about to happen. A future air traffic management should pro-actively anticipate disruptive weather elements and their time scales well in advance to avoid or to mitigate the impact upon the traffic flow. But "weather” is not a technical problem that can be simply solved. Predicting the weather is a difficult and complex task and only possible within certain limits. It is therefore necessary to observe and forecast the changing state of the atmosphere as precisely and as rapidly as possible. Measures must be taken to minimise the impact of adverse weather or changing weather conditions on air traffic management and tactical manoeuvring, both on ground and onboard the aircraft. Weather and meteorological information (MET in short) is to be considered as an integral part of air traffic management. In 2008, DLR has initiated a major project "Wetter & Fliegen” (German for "Weather and Flying”) to address this inter¬disciplinary challenge. Its goal is to augment safety and efficiency of air transportation, thereby focusing on the two German hub airports in Frankfurt and München. This high-level goal shall be reached by two strands of work: a) The development of an Integrated Terminal Weather Systems (ITWS) for the air¬¬ports at Frankfurt and München to improve the detection and forecast of weather phenomena adversely affecting airport operations, including deep convection (thunderstorms, hail, wind), wake vortex, and winter weather conditions, and b) The development of on-board systems for automated control, surveillance and information and the specification of requirements for on-board sensors, to improve the behaviour of the aircraft when confronted with wind gusts, wake vortices and thunderstorms. The project design and first results will be presented.

Gerz, T.

2009-09-01

29

Simulating Virtual Terminal Area Weather Data Bases for Use in the Wake Vortex Avoidance System (Wake VAS) Prediction Algorithm  

NASA Technical Reports Server (NTRS)

During the research project, sounding datasets were generated for the region surrounding 9 major airports, including Dallas, TX, Boston, MA, New York, NY, Chicago, IL, St. Louis, MO, Atlanta, GA, Miami, FL, San Francico, CA, and Los Angeles, CA. The numerical simulation of winter and summer environments during which no instrument flight rule impact was occurring at these 9 terminals was performed using the most contemporary version of the Terminal Area PBL Prediction System (TAPPS) model nested from 36 km to 6 km to 1 km horizontal resolution and very detailed vertical resolution in the planetary boundary layer. The soundings from the 1 km model were archived at 30 minute time intervals for a 24 hour period and the vertical dependent variables as well as derived quantities, i.e., 3-dimensional wind components, temperatures, pressures, mixing ratios, turbulence kinetic energy and eddy dissipation rates were then interpolated to 5 m vertical resolution up to 1000 m elevation above ground level. After partial validation against field experiment datasets for Dallas as well as larger scale and much coarser resolution observations at the other 8 airports, these sounding datasets were sent to NASA for use in the Virtual Air Space and Modeling program. The application of these datasets being to determine representative airport weather environments to diagnose the response of simulated wake vortices to realistic atmospheric environments. These virtual datasets are based on large scale observed atmospheric initial conditions that are dynamically interpolated in space and time. The 1 km nested-grid simulated datasets providing a very coarse and highly smoothed representation of airport environment meteorological conditions. Details concerning the airport surface forcing are virtually absent from these simulated datasets although the observed background atmospheric processes have been compared to the simulated fields and the fields were found to accurately replicate the flows surrounding the airport where coarse verification data were available as well as where airport scale datasets were available.

Kaplan, Michael L.; Lin, Yuh-Lang

2004-01-01

30

Tactical visualization module  

NASA Astrophysics Data System (ADS)

The Tactical Visualization Module (TVM) research effort will develop and demonstrate a portable, tactical information system to enhance the situational awareness of individual warfighters and small military units by providing real-time access to manned and unmanned aircraft, tactically mobile robots, and unattended sensors. TVM consists of a family of portable and hand-held devices being advanced into a next- generation, embedded capability. It enables warfighters to visualize the tactical situation by providing real-time video, imagery, maps, floor plans, and 'fly-through' video on demand. When combined with unattended ground sensors, such as Combat- Q, TVM permits warfighters to validate and verify tactical targets. The use of TVM results in faster target engagement times, increased survivability, and reduction of the potential for fratricide. TVM technology can support both mounted and dismounted tactical forces involved in land, sea, and air warfighting operations. As a PCMCIA card, TVM can be embedded in portable, hand-held, and wearable PCs. Thus, it leverages emerging tactical displays including flat-panel, head-mounted displays. The end result of the program will be the demonstration of the system with U.S. Army and USMC personnel in an operational environment. Raytheon Systems Company, the U.S. Army Soldier Systems Command -- Natick RDE Center (SSCOM- NRDEC) and the Defense Advanced Research Projects Agency (DARPA) are partners in developing and demonstrating the TVM technology.

Kachejian, Kerry C.; Vujcic, Doug

1999-07-01

31

Definitions of Tactical and Strategic: An Informal Study  

NASA Technical Reports Server (NTRS)

Seventeen subject matter experts defined tactical and strategic within the aviation domain. They provided five verbs and a sentence describing both behaviors. The verbs for strategic behavior were Plan, Think, Arrange, Formulate, Intend, Devise, Anticipate, and Order. The verbs for tactical behavior were Act, Fly, Respond, Do, Avoid, Control, React, and Move. Verbs that were common to both were Get Information, Navigate, Know, Execute, Manage, Perceive, Understand, Direct, Concentrate, and Point. The responses highlight the difference between planning (strategic) and carrying out those plans (tactical). Tactical verbs are more action-oriented that change the state of the world after they have been accomplished. Strategic verbs are more prescriptive in that they do not change the state of the world but offer a procedure or program for changing the world. The pilot is in a tactical mode when actually moving the aircraft and in a strategic mode when thinking about moving it.

Schutte, Paul C.

2004-01-01

32

The Tactics of Hope  

ERIC Educational Resources Information Center

In this article, the author provides an intimate glimpse into the writing work that Joe Cytrynbaum did with students from Manley Career Academy High School in Chicago. The author's discussion of Joe's "tactics of hope" is layered and brought to life by Joe's poetry and the poetry of his students. The author presents Joe's poems and the insights of…

Cytrynbaum, Pamela

2010-01-01

33

Three Tactic Theorem Proving  

Microsoft Academic Search

We describe the key features of the proof description language of Declare, an experimental theorem prover for higher orderlogic. We take a somewhat radical approach to proof description: proofsare not described with tactics but by using just three expressive outlining constructs. The language is declarative because each step specifiesits logical consequences, i.e. the constants and formulae that are introduced,independently of

Don Syme

1999-01-01

34

Reliability for tactical cryocoolers  

NASA Astrophysics Data System (ADS)

For the past 18 years Carleton Life Support Systems has produced over 15,000 tactical cryogenic coolers that are primarily used in military infrared systems with excellent demonstrated reliability. As system reliability has improved, the cooler performance has emerged as a dominant component for reliability predictions. This has driven cooler reliability requirements to increase from a 1500-hour rotary cooler in chiefly ground applications to current requirements of 20,000 hours for linear coolers in advanced airborne applications. At the same time there is a push for improved cooldown time, lower power, lighter weight and smaller package. This paper reviews our progress on extending cooler life. It reviews recent product returns and contends that the majority of issues are not primarily related to reliability. It also reviews how system performance specifications are restrictive to the cooler designer in achieving higher reliability in tactical coolers.

Hoefelmeyer, Henry L.; Nelson, Randy; Nelson, Robert

2004-08-01

35

Tactical force protection  

NASA Astrophysics Data System (ADS)

The need for enhanced tactical force protection capabilities is evidenced from our recent experiences in Iraq and Afghanistan and occurs wherever U.S. Forces maintain a forward presence in a potentially hostile environment. Levels of force protection proficiency vary widely from combat units whose mission is to close with and destroy the enemy to combat support/combat service support units performing maintenance and logistics functions. We must provide force protection capabilities that are not only good enough to get the job done, but affordable for the entire force. Addressing the force protection challenge requires an investment in research and development to deliver affordable, scalable, modular and sustainable force protection equipment. This can be accomplished through an evolutionary acquisition strategy of capability upgrades in the near, mid and far-terms that leverage the Army's investments in unmanned ground sensors (UGS), unmanned ground vehicles (UGV) and surveillance radar and imaging technology. This approach addresses the field's immediate tactical force protection requirements, while working towards full integration with the Future Combat System. Futuristic Tactical Force Protection will consist of a fully integrated system of systems architecture that will include UGVs, UGS and Unmanned Aerial Vehicles (UAVs) that are networked with the Future Force.

Stockel, Eugene; Moneyhun, Jon C.

2004-09-01

36

Population avoidance in aimpoint selection  

Microsoft Academic Search

In most past studies of the effectiveness of tactical nuclear weapons vs the amount of collateral damage produced (civilian casualties), civilians have been congregated into idealized shaped towns and cities, and criteria for city avoidance were usually formulated in terms relating to a town's population. This treatment was sufficient in those studies where weapon yields were so large that great

1978-01-01

37

Innovation and tactical missiles  

NASA Astrophysics Data System (ADS)

Examples of design developments of tactical missiles are given to illustrate the contribution of new ideas to the improvement of military missiles. These developments include placing forward the propulsion section of antitank missiles to improve efficiency by automatically providing a standoff distance; the modification of the Exocet antiship missile to a Mach 2 velocity; an improved guiding system and a main propulsion assured by ramjet engine; and an antimissile missile with a very short reaction time combining rocket engine and aerodynamic forces to provide a high precision guiding system. The design and test facilities required are also discussed.

Comon, J. P.

38

Dynamic tactical targeting  

NASA Astrophysics Data System (ADS)

Today's Warfighter requires new capabilities that reduce the kill chain timeline. The capability to maintain track on mobile Time Sensitive Targets (TSTs) throughout the entire targeting cycle is a step towards that goal. Continuous tracking provides strike assets with high confident, actionable, targeting information, which reduces the time it takes to reacquire the target prior to prosecution. The Defense Advanced Research Program Agency (DARPA) Dynamic Tactical Targeting (DTT) program is developing new sensor resource management and data fusion technologies for continuous coordination of tactical sensor resources to detect and identify mobile ground targets and maintain track on these known high-value targets. An essential concept of the DTT approach is the need for the fusion system and the resource manager to operate as part of a closed loop process that produces optimum collection plans against the designated high value TSTs. In this paper, we describe this closed loop approach used within the DTT system. The paper also describes other aspects of the DTT program, including overall program status, the DTT distributed architecture, details of the fusion and dynamic sensor management components, and concludes with current evaluation results.

Hanselman, Phillip B.; Lawrence, Craig; Fortunato, Evan; Tenney, Robert R.; Blasch, Erik P.

2004-07-01

39

Polyandry and alternative mating tactics  

PubMed Central

Many species in the animal kingdom are characterized by alternative mating tactics (AMTs) within a sex. In males, such tactics include mate guarding versus sneaking behaviours, or territorial versus female mimicry. Although AMTs can occur in either sex, they have been most commonly described in males. This sex bias may, in part, reflect the increased opportunity for sexual selection that typically exists in males, which can result in a higher probability that AMTs evolve in that sex. Consequently, females and polyandry can play a pivotal role in governing the reproductive success associated with male AMTs and in the evolutionary dynamics of the tactics. In this review, we discuss polyandry and the evolution of AMTs. First, we define AMTs and review game theoretical and quantitative genetic approaches used to model their evolution. Second, we review several examples of AMTs, highlighting the roles that genes and environment play in phenotype expression and development of the tactics, as well as empirical approaches to differentiating among the mechanisms. Third, ecological and genetic constraints to the evolution of AMTs are discussed. Fourth, we speculate on why female AMTs are less reported on in the literature than male tactics. Fifth, we examine the effects of AMTs on breeding outcomes and female fitness, and as a source, and possibly also a consequence, of sexual conflict. We conclude by suggesting a new model for the evolution of AMTs that incorporates both environmental and genetic effects, and discuss some future avenues of research. PMID:23339236

Neff, Bryan D.; Svensson, Erik I.

2013-01-01

40

New Tactics in Human Rights  

NSDL National Science Digital Library

As this website explains in its Common Questions area, "Tactics consist of how to make a change", and given this statement, the site will be of great interest to those with a concern for international human rights. The New Tactics in Human Rights organization is primarily concerned with providing practitioners in the field with a package of practical tools, a worldwide symposium, and a number of other strategic planning resources. The project itself is coordinated by the Center for Victims of Torture and is overseen by a board of advisors that includes novelist Mario Vargas Llosa and the Right Honorable Kim Campbell, who is the former Prime Minister of Canada. The "Tools for Action" section is a real find as it contains a number of tactical notebooks taken from various case studies around the world, including work from Turkey, Hungary, Romania, and Albania. It is worth noting that many of the materials on the site are also available in Spanish and French.

41

Human inspiration for autonomous vehicle tactics  

E-print Network

Tactical control is needed in environments characterized by uncertainty and continuous, dynamic change. Given the likelihood of time constraints and high risks associated with poor tactical choices, current autonomous ...

Beaton, Jonathan Scott

2006-01-01

42

Tales of future weather  

NASA Astrophysics Data System (ADS)

Society is vulnerable to extreme weather events and, by extension, to human impacts on future events. As climate changes weather patterns will change. The search is on for more effective methodologies to aid decision-makers both in mitigation to avoid climate change and in adaptation to changes. The traditional approach uses ensembles of climate model simulations, statistical bias correction, downscaling to the spatial and temporal scales relevant to decision-makers, and then translation into quantities of interest. The veracity of this approach cannot be tested, and it faces in-principle challenges. Alternatively, numerical weather prediction models in a hypothetical climate setting can provide tailored narratives for high-resolution simulations of high-impact weather in a future climate. This 'tales of future weather' approach will aid in the interpretation of lower-resolution simulations. Arguably, it potentially provides complementary, more realistic and more physically consistent pictures of what future weather might look like.

Hazeleger, W.; van den Hurk, B. J. J. M.; Min, E.; van Oldenborgh, G. J.; Petersen, A. C.; Stainforth, D. A.; Vasileiadou, E.; Smith, L. A.

2015-02-01

43

Tactical high-energy laser  

Microsoft Academic Search

The Nautilus Project was started in 1995 as a joint US-Israel feasibility study for using laser systems to defend against short-range artillery rockets. It has now matured into a successful laser weapon demonstration program - the Tactical High Energy Laser (THEL) Advanced Concept Technology Demonstration (ACTD) Program. By now the THEL Demonstrator has engaged and destroyed a large number of

Josef Shwartz; Gerald T. Wilson; Joel M. Avidor

2002-01-01

44

Unaided tactical guidance flight test  

Microsoft Academic Search

A low cost midcourse guidance technique suitable for standoff tactical weapons uses the launch aircraft navigation system and Kalman filtering to align and calibrate a weapon contained, low cost strapdown navigation system. Post launch, the strapdown system provides unaided inertial guidance along the midcourse trajectory. The strapdown sensor chosen to implement this form of guidance is the low cost inertial

L. D. Perlmutter; C. K. Fitschen

1980-01-01

45

Tactical Underlife: Understanding Students' Perceptions  

ERIC Educational Resources Information Center

This article describes one urban classroom and the language and literacy practices jointly constructed by a veteran urban teacher, Lynn Gatto, and her 3rd grade students. Drawing from two ethnographic studies of Gattos 2nd-4th grade looped classroom, we argue that Gatto and her students use the interplay between strategies and tactics (De Certeau,…

Larson, Joanne; Gatto, Lynn Astarita

2004-01-01

46

Avoiding Snakebites  

MedlinePLUS

... Snakebites Avoiding Snakebites How can I avoid snakebites? Snakes are most active in the spring, early summer ... warm and outdoor activities are popular. Although most snakes are not poisonous, there are several kinds of ...

47

Evidence for tactical concealment in a wild primate.  

PubMed

Theory predicts that cheating individuals should alter their behaviour to avoid detection, yet empirical data for such 'deceptive' behaviour (and its putative consequence-punishment) is almost entirely absent from the literature. This dearth of evidence, particularly among primates, limits our understanding of the evolution of deception and punishment. Here, we quantify deception and punishment in a reproductive context in wild geladas (Theropithecus gelada). Individuals involved in extra-pair copulations (9% of observed copulations) exhibited behaviour consistent with tactical deception: they were less likely to vocalize and more likely to copulate when the cuckolded male was a sizable distance away (>20?m). Further, many extra-pair copulations (?20%) elicited post-copulatory aggression-likely, punishment-from cuckolded males. This rare empirical evidence of both tactical concealment and retaliatory aggression offers a potential model system for examining the co-occurrence of deception and punishment in natural settings. PMID:23403563

le Roux, Aliza; Snyder-Mackler, Noah; Roberts, Eila K; Beehner, Jacinta C; Bergman, Thore J

2013-01-01

48

Unaided tactical guidance flight test  

NASA Astrophysics Data System (ADS)

A low cost midcourse guidance technique suitable for standoff tactical weapons uses the launch aircraft navigation system and Kalman filtering to align and calibrate a weapon contained, low cost strapdown navigation system. Post launch, the strapdown system provides unaided inertial guidance along the midcourse trajectory. The strapdown sensor chosen to implement this form of guidance is the low cost inertial guidance subsystem (LCIGS), a modular strapdown package which uses embedded microprocessors, single degree of freedom gyroscopes, and pendulous mass accelerometers. Designed and built for use in tactical weapons, LCIGS features digital torque loops for the gyros and temperature compensation of all six sensors. Studies were conducted to project system performance, and the results indicate that through the alignment and calibration process the predominant LCIGS sensor errors can be reduced by an order of magnitude. A flight test program was structured to demonstrate performance. The unaided tactical guidance concept, the system hardware and software to be tested, the LCIGS and the preflight calibration features incorporated into its support equipment, unique laboratory testing to be performed on the system, and the planned flight tests are described.

Perlmutter, L. D.; Fitschen, C. K.

1980-10-01

49

Weather Watch  

ERIC Educational Resources Information Center

Suggests a number of ways in which Federal Aviation Agency weather report printouts can be used in teaching the weather section of meteorology. These weather sequence reports can be obtained free of charge at most major airports. (JR)

Bratt, Herschell Marvin

1973-01-01

50

Intelligent weather agent for aircraft severe weather avoidance  

E-print Network

with the existing Simplified Flight Management System and coupled with the heading command and hold autopilot of the nonlinear, non-real-time, six degrees-of-freedom Engineering Flight Simulator. Test cases consisting of stationary and moving thunderstorms are used...

Bokadia, Sangeeta

2012-06-07

51

The methods of reliability analysis and evaluation of tactical internet  

Microsoft Academic Search

As a military mobile ad-hoc wireless network, tactical internet is mainly used in the division, brigade and below combat command units of data communication. The concept and character of tactical Internet is expatiated, the reliability of tactical Internet is defined, the reliability parameters system of tactical Internet is established, and the reliability analysis and evaluation methods of tactical Internet are

Chunhua Yang; Zhenfu Zhu; Changfu Li; Tao Li

2009-01-01

52

Weather Information Communications (WINCOMM) Project: Dissemination of Weather Information for the Reduction of Aviation Weather-Related Accident Causal Factors  

NASA Technical Reports Server (NTRS)

Weather Information Communications (WINCOMM) is part of the Weather Accident Prevention (WxAP) Project, which is part of the NASA's Aviation Safety and Security Program. The goals of WINCOMM are to facilitate the exchange of tactical and strategic weather information between air and ground. This viewgraph presentation provides information on data link decision factors, architectures, validation goals. WINCOMM is capable of providing en-route communication air-to-ground, ground-to-air, and air-to-air, even on international or intercontinental flights. The presentation also includes information on the capacity, cost, and development of data links.

Jarrell, Michael; Tanger, Thomas

2004-01-01

53

Young Men’s Condom Use Resistance Tactics: A Latent Profile Analysis  

PubMed Central

Research suggests that many men have used a variety of tactics to avoid using a condom when having sex with a woman. Guided by previous work demonstrating that men’s use of coercive condom resistance tactics was predicted by negative attitudes toward women, inconsistent condom use, multiple partners, and sexual sensation seeking, the current study used latent profile analysis (LPA) to determine whether similar constructs were associated with a variety of resistance tactics. A community sample of 313 moderate drinking men participated, of whom 80% reported employing at least one condom use resistance tactic since adolescence. The LPA revealed three classes of men. In general, men with the least negative beliefs about women, low levels of sexual sensation seeking and impulsivity, and positive beliefs about condoms (Condom Positive/Low Hostility) reported less use of resistance tactics than men with moderate sexual sensation seeking and impulsivity, negative beliefs about condoms, and moderate (Condom Negative/Moderate Hostility) or high (Condom Negative/High Hostility) negative attitudes about women. The classes also differed in terms of their sexual behaviors. This study demonstrated that sexual risk behavior interventions should not only address the tactics through which men resist using condoms but also tailor these efforts to men’s individual characteristics. PMID:23548069

Davis, Kelly Cue; Stappenbeck, Cynthia A.; Norris, Jeanette; George, William H.; Jacques-Tiura, Angela J.; Schraufnagel, Trevor J.; Kajumulo, Kelly F.

2013-01-01

54

Weather Forecasting  

NSDL National Science Digital Library

Students consider how weather forecasting plays an important part in their daily lives. They learn about the history of weather forecasting — from old weather proverbs to modern forecasting equipment — and how improvements in weather technology have saved lives by providing advance warning of natural hazards.

Integrated Teaching and Learning Program,

55

UM Weather  

NSDL National Science Digital Library

Sponsored by The Weather Underground at the University of Michigan at Ann Arbor, UM Weather bills itself as the "Internet's premier source of weather information." The site offers several general audience tools such as the Fast Forecast for any city in the US, ski weather, and weather cams. But, it also provides access to over two dozen weather software packages, a new computer model forecasts page, and most impressively a list of close to 400 other weather related Web sites. Professionals and researchers will appreciate the non-technical feel of the site and the valuable information they can procure from it.

56

Prognostic Analysis of the Tactical Quiet Generator  

SciTech Connect

The U.S. Army needs prognostic analysis of mission-critical equipment to enable condition-based maintenance before failure. ORNL has developed and patented prognostic technology that quantifies condition change from noisy, multi-channel, time-serial data. This report describes an initial application of ORNL's prognostic technology to the Army's Tactical Quiet Generator (TQG), which is designed to operate continuously at 10 kW. Less-than-full power operation causes unburned fuel to accumulate on internal components, thereby degrading operation and eventually leading to failure. The first objective of this work was identification of easily-acquired, process-indicative data. Two types of appropriate data were identified, namely output-electrical current and voltage, plus tri-axial acceleration (vibration). The second objective of this work was data quality analysis to avoid the garbage-in-garbage-out syndrome. Quality analysis identified more than 10% of the current data as having consecutive values that are constant, or that saturate at an extreme value. Consequently, the electrical data were not analyzed further. The third objective was condition-change analysis to indicate operational stress under non-ideal operation and machine degradation in proportion to the operational stress. Application of ORNL's novel phase-space dissimilarity measures to the vibration power quantified the rising operational stress in direct proportion to the less-than-full-load power. We conclude that ORNL's technology is an excellent candidate to meet the U.S. Army's need for equipment prognostication.

Hively, Lee M [ORNL

2008-09-01

57

Meniere's disease: A surgeon's tactics  

NASA Technical Reports Server (NTRS)

Surgical procedures for treating Meniere's disease are discussed. Based on the results of 250 operations, it is concluded that interventions are sufficiently effective not only with vestibular dysfunction, but also with hearing disorders. In surgical treatment of Meniere's disease, it is expedient to adhere to by-stage tactics: to start with the simplest and least traumatic interventions - operations on the nerves of the tympanic cavity, and if these are ineffective to use more complex methods, including drainage or shunting of the endolymphatic sac.

Soldatov, I.

1980-01-01

58

Winter Weather  

NSDL National Science Digital Library

This project explores factors that help create severe winter weather. An interactive simulation provides hands-on experience, followed by guiding questions and resource exploration. Weather affects our everyday lives. Some days it's sunny and some days its not. The years weather is split up into seasons. 1. What are the four seasons? 2. What kind of weather do you see in the summer? 3. What kind of weather is unique to winter? 4. ...

Mrs. Bellows

2009-09-28

59

1 The evolution of alternative reproductive tactics: concepts and questions  

E-print Network

1 · The evolution of alternative reproductive tactics: concepts and questions MICHAEL TABORSKY, RUI adaptations to reproductive competition are mainly Alternative Reproductive Tactics, ed. Rui F. Oliveira

60

Automated Operator Instruction in Team Tactics.  

ERIC Educational Resources Information Center

The report discusses the applicability of available advanced training technologies to the training of Navy tactical teams. An experiment was conducted to test whether there is sufficient commonality in team tasks performed in existing team tactics trainers to warrant development of a team training system for specific advanced technologies. Data…

Daniels, R. W.; And Others

61

Tactical communication systems with the GOSIP architecture  

Microsoft Academic Search

The author proposes a solution to the issue of digital communications interoperability between tactical and strategic (or other) groups within an integrated communications architecture of the future. He proposes two significant changes that permit the tactical systems to be integrated into future communication systems. The first change requires a common set of communication protocols to be used over the communications

1992-01-01

62

Automatically Generating Game Tactics via Evolutionary Learning  

E-print Network

Automatically Generating Game Tactics via Evolutionary Learning Marc Ponsen H´ector Mu-controlled opponents in video games is called game AI. Adaptive game AI can improve the entertainment value of games to changes in human-player tactics. Dynamic scripting is a reinforcement learning approach to adap- tive game

Spronck, Pieter

63

The relative impact 1 Organizational socialization tactics  

E-print Network

is that organizational socialization facilitates the transmission of an organization's culture and provides newcomersThe relative impact 1 Organizational socialization tactics: Determining the relative impact the relationships between organizational socialization tactics and perceived fit. Using the same database, we made

Boyer, Edmond

64

Recent consideration in tactical medicine.  

PubMed

A philosophical approach to tactical and remote medicine should be reflected in the gear (e.g., equipment and technology) chosen as well as the protocols used. The gear needs to be lightweight and small volume. Asmuch as possible, it should have multiple uses, and there should be no redundancy with other items. When modern technology (e.g., hemostatic gauze, pulse oximeters, etc.) allows it to have unique applications, it should be used. Otherwise, if simple basic gear works, it should remain a staple (e.g., cravats). Protocols should reflect the goal to provide thorough care in an efficient manner. They should be straightforward and scaleable and be capable of being trained in a fashion that will allow them to become automatic under duress. These guiding principles establish a basis from which the Special Operations Forces/Tactical Medic or PJ can operate to maximal effectiveness. This article will describe current thinking in Pararescue as it relates to gear and protocols. PMID:23817879

Rush, Stephen

2013-01-01

65

Take Steps to Avoid Winter Falls  

MedlinePLUS

... please enable JavaScript. Take Steps to Avoid Winter Falls Check the traction of your boots, keep your ... Weather Emergencies SATURDAY, Jan. 17, 2015 (HealthDay News) -- Falls are a major cause of injuries during the ...

66

Mechanical Weathering  

NSDL National Science Digital Library

This activity was designed to give students an opportunity to realize that all rocks weather mechanically and each specific rock type has its own particular rate of weathering. Students discover that mechanical weathering is the process of breaking down bedrock into smaller fragments by physical as opposed to chemical means and that rock weathering, although it seems to occur slowly in human terms, is an extremely significant part of the rock cycle. They will learn that weathered rock materials are called sediments and are the structural basis for soils and can also be compacted into sedimentary rock. Students will realize that rock weathering rates vary widely depending on mineral content, texture, rock type, and climate and that differential weathering (varying weathering rates for two or more rock types in physical contact with each other) has given rise to some of the world's most breathtaking scenery.

67

Weathering Animation  

NSDL National Science Digital Library

Weathering is the term that describes all the processes that break down rocks in the environment near the Earth's surface. This module will help you to understand two weathering processes: mechanical and chemical.

2002-01-01

68

Winter Weather  

MedlinePLUS

... About CDC.gov . Natural Disasters and Severe Weather Earthquakes Being Prepared Emergency Supplies Home Hazards Indoor Safety ... What's New A - Z Index Disasters & Severe Weather Earthquakes Extreme Heat Floods Hurricanes Landslides Tornadoes Tsunamis Volcanoes ...

69

Tactical voting in plurality elections.  

PubMed

How often will elections end in landslides? What is the probability for a head-to-head race? Analyzing ballot results from several large countries rather anomalous and yet unexplained distributions have been observed. We identify tactical voting as the driving ingredient for the anomalies and introduce a model to study its effect on plurality elections, characterized by the relative strength of the feedback from polls and the pairwise interaction between individuals in the society. With this model it becomes possible to explain the polarization of votes between two candidates, understand the small margin of victories frequently observed for different elections, and analyze the polls' impact in American, Canadian, and Brazilian ballots. Moreover, the model reproduces, quantitatively, the distribution of votes obtained in the Brazilian mayor elections with two, three, and four candidates. PMID:20856800

Araújo, Nuno A M; Andrade, José S; Herrmann, Hans J

2010-01-01

70

Weather Odds  

NSDL National Science Digital Library

The Weather Odds site helps users learn about the odds of various weather happening at monthly and daily levels. The site relies on past climate data from thousands of locations and it's a fine resource. In the Quick Weather Data area, visitors can check out popular United States locations or use the search engine to breeze along to their preferred habitat. This version of Weather Odds is compatible with all operating systems.

2014-05-08

71

Information Management For Tactical Reconnaissance  

NASA Astrophysics Data System (ADS)

The expected battlefield tactics of the 1980's and 1990's will be fluid and dynamic. If tactical reconnaissance is to meet this challenge, it must explore all ways of accelerating the flow of information through the reconnaissance cycle, from the moment a tasking request is received to the time the mission results are delivered to the requestor. In addition to near real-time dissemination of reconnaissance information, the mission planning phase needs to be more responsive to the rapidly changing battlefield scenario. By introducing Artificial Intelligence (AI) via an expert system to the mission planning phase, repetitive and computational tasks can be more readily performed by the ground-based mission planning system, thereby permitting the aircrew to devote more of their time to target study. Transporting the flight plan, plus other mission data, to the aircraft is simple with the Fairchild Data Transfer Equipment (DTE). Aircrews are relieved of the tedious, error-prone, and time-consuming task of manually keying-in avionics initialization data. Post-flight retrieval of mission data via the DTE will permit follow-on aircrews, just starting their mission planning phase, to capitalize on current threat data collected by the returning aircrew. Maintenance data retrieved from the recently flown mission will speed-up the aircraft turn-around by providing near-real time fault detection/isolation. As future avionics systems demand more information, a need for a computer-controlled, smart data base or expert system on-board the aircraft will emerge.

White, James P.

1984-12-01

72

World Weather  

NSDL National Science Digital Library

What's going on in the world of weather? Are there storms around Sri Lanka? What about the snows of Kilimanjaro? These can be pressing questions, indeed, and the World Weather app is a great way to stay in touch with weather patterns around the globe. Users will find that they can just type in a city name to see the current weather and also zoom around the globe as they see fit. It's a remarkable addition to the world of existing weather tracking apps and is compatible with all operating systems.

Elias, Jaume S.

2014-02-20

73

Shade Avoidance  

PubMed Central

The presence of neighboring vegetation modifies the light environment experienced by plants, generating signals that are perceived by phytochromes and cryptochromes. These signals cause large changes in plant body form and function, including enhanced growth of the hypocotyl and petioles, a more erect position of the leaves and early flowering in Arabidopsis thaliana. Collectively, these so-called shade-avoidance responses tend to reduce the degree of current or future shade by neighbors. Shade light signals increase the abundance of PHYTOCHROME INTERACTING FACTOR 4 (PIF4) and PIF5 proteins, promote the synthesis and redirection of auxin, favor the degradation of DELLA proteins and increase the expression of auxin, gibberellins and brassinosteroid-promoted genes, among other events downstream the photoreceptors. Selectively disrupting these events by genetic or pharmacological approaches affects shade-avoidance responses with an intensity that depends on the developmental context and the environment. Shade-avoidance responses provide a model to investigate the signaling networks used by plants to take advantage of the cues provided by the environment to adjust to the challenges imposed by the environment itself. PMID:22582029

Casal, Jorge J.

2012-01-01

74

Trauma Ultrasound in Civilian Tactical Medicine  

PubMed Central

The term “tactical medicine” can be defined in more than one way, but in the nonmilitary setting the term tactical emergency medical services (TEMS) is often used to denote medical support operations for law enforcement. In supporting operations involving groups such as special weapons and tactics (SWAT) teams, TEMS entail executing triage, diagnosis, stabilization, and evacuation decision-making in challenging settings. Ultrasound, now well entrenched as a part of trauma evaluation in the hospital setting, has been investigated in the prehospital arena and may have utility in TEMS. This paper addresses potential use of US in the tactical environment, with emphasis on the lessons of recent years' literature. Possible uses of US are discussed, in terms of both specific clinical applications and also with respect to informing triage and related decision making. PMID:23243509

Whelan, Lori; Justice, William; Goodloe, Jeffrey M.; Dixon, Jeff D.; Thomas, Stephen H.

2012-01-01

75

Reproductive tactics in the American redstart.  

E-print Network

??The occurrence of three reproductive tactics in a population of American redstarts was estimated: extra-pair fertilization, egg-dumping, and male polyterritoriality. Using DNA fingerprinting we show… (more)

Perreault, Stéphane, 1967-

1994-01-01

76

Initial radiations from tactical nuclear weapons  

SciTech Connect

Neutron and gamma-ray free-field kermas and fluence spectra for ranges between 1 and 2 km are presented for three tactical nuclear weapons and are compared with nuclear radiations at Hiroshima. The three tactical weapons are modeled as near-surface bursts of a fusion explosive, a fission explosive, and a suppressed-neutron explosive represented by the Little Boy bomb used at Hiroshima.

Loewe, W.E.

1985-08-01

77

Shade avoidance.  

PubMed

The threat to plant survival presented by light limitation has driven the evolution of highly plastic adaptive strategies to either tolerate or avoid shading by neighbouring vegetation. When subject to vegetational shading, plants are exposed to a variety of informational signals, which include altered light quality and a reduction in light quantity. The former includes a decrease in the ratio of red to far-red wavelengths (low R : FR) and is detected by the phytochrome family of plant photoreceptors. Monitoring of R : FR ratio can provide an early and unambiguous warning of the presence of competing vegetation, thereby evoking escape responses before plants are actually shaded. The molecular mechanisms underlying physiological responses to alterations in light quality have now started to emerge, with major roles suggested for the PIF (PHYTOCHROME INTERACTING FACTOR) and DELLA families of transcriptional regulators. Such studies suggest a complex interplay between endogenous and exogenous signals, mediated by multiple photoreceptors. The phenotypic similarities between physiological responses habitually referred to as 'the shade avoidance syndrome' and other abiotic stress responses suggest plants may integrate common signalling mechanisms to respond to multiple perturbations in their natural environment. PMID:18537892

Franklin, Keara A

2008-01-01

78

Predicting Weather  

NSDL National Science Digital Library

By performing the activities presented in this website, fourth grade students can learn about weather instruments and data collection. This website, produced by the Government of Saskatchewan, also explores how the weather can impact local communities. Each activity presented here includes both objectives and assessment techniques for the lesson. Sixteen different activity suggestions provide students and teachers with ample opportunities to explore weather in the classroom.

2008-03-28

79

Weather Watch  

NSDL National Science Digital Library

The weather watch activity is designed to provide instruction on how to collect weather data from on-line databases. Following completion of this activity the user will be able to look up weather conditions for any city in North America, know what radar maps are used for and how to access them, and know how to access satellite images and make estimated guesses on cloud conditions for their area from them.

Hopson, R.

80

Weather Instruments  

NSDL National Science Digital Library

This Topic in Depth discusses the variety of instruments used to collect climate and weather data. The first two websites provide simple introductions to the many weather instruments. Bethune Academy's Weather Center (1) discusses the functions of psychrometers, anemometers, weather balloons, thermometers, and barometers. The Illinois State Water Survey (2) furnishes many images of various instruments that collect data daily for legal issues, farmers, educators, students, and researchers. The third website (3), created by the Center for Improving Engineering and Science Education (CIESE), provides a classroom activity to educate users on how to build and use weather instruments. By the end of the group project, students should know all about wind vanes, rain gauges, anemometers, and thermometers. Next, the Miami Museum of Science provides a variety of activities to help students learn about the many weather instruments including wind scales and wind chimes (4). Students can learn about the wind, air pressure, moisture, and temperature. At the fifth website, the Tyson Research Center at Washington University describes the devices it uses in its research (5). At the various links, users can find out the center's many projects that utilize meteorological data such as acid rain monitoring. The sixth website, a pdf document created by Dr. John Guyton at the Mississippi State University Extension Service, provides guidance to teachers about the education of weather patterns and instruments (6). Users can find helpful information on pressure systems, humidity, cloud patterns, and much more. Next, the University of Richmond discusses the tools meteorologists use to learn about the weather (7). While providing materials about the basic tools discussed in the other websites, this site also offers information about weather satellites, radar, and computer models. After discovering the many weather instruments, users can learn about weather data output and analysis at the Next Generation Weather Lab website (8). This expansive website provides an abundance of surface data and upper air data as well as satellite and radar images for the United States.

81

Weather Experiments  

NSDL National Science Digital Library

Looking for fun ways to learn about weather? Weather Wiz Kids has 39 fun weather related experiments for you to try. These experiments can be done in the classroom with your friends or even at home! Some of the experiments on the site include: tornado in a bottle, make lightning, make it rain, cloud in a bottle, what's in the wind, the Doppler Effect, and baking soda volcano.

2010-01-01

82

Wacky Weather  

ERIC Educational Resources Information Center

What do a leaf blower, water hose, fan, and ice cubes have in common? Ask the students who participated in an integrative science, technology, engineering, and mathematics (I-STEM) education unit, "Wacky Weather," and they will tell say "fun and severe weather"--words one might not have expected! The purpose of the unit…

Sabarre, Amy; Gulino, Jacqueline

2013-01-01

83

Weather Forecasting  

NSDL National Science Digital Library

This activity (on page 2 of the PDF) is a full inquiry investigation into meteorology and forecasting. Learners will research weather folklore, specifically looking for old-fashioned ways of predicting the weather. Then, they'll record observations of these predictors along with readings from their own homemade barometer, graphing the correct predictions for analysis. Relates to linked video, DragonflyTV: Forecasting.

2012-06-26

84

Weather Forecasting  

NSDL National Science Digital Library

Weather Forecasting is a set of computer-based learning modules that teach students about meteorology from the point of view of learning how to forecast the weather. The modules were designed as the primary teaching resource for a seminar course on weather forecasting at the introductory college level (originally METR 151, later ATMO 151) and can also be used in the laboratory component of an introductory atmospheric science course. The modules assume no prior meteorological knowledge. In addition to text and graphics, the modules include interactive questions and answers designed to reinforce student learning. The module topics are: 1. How to Access Weather Data, 2. How to Read Hourly Weather Observations, 3. The National Collegiate Weather Forecasting Contest, 4. Radiation and the Diurnal Heating Cycle, 5. Factors Affecting Temperature: Clouds and Moisture, 6. Factors Affecting Temperature: Wind and Mixing, 7. Air Masses and Fronts, 8. Forces in the Atmosphere, 9. Air Pressure, Temperature, and Height, 10. Winds and Pressure, 11. The Forecasting Process, 12. Sounding Diagrams, 13. Upper Air Maps, 14. Satellite Imagery, 15. Radar Imagery, 16. Numerical Weather Prediction, 17. NWS Forecast Models, 18. Sources of Model Error, 19. Sea Breezes, Land Breezes, and Coastal Fronts, 20. Soundings, Clouds, and Convection, 21. Snow Forecasting.

Nielsen-Gammon, John

1996-09-01

85

Certification of tactics and strategies in aviation  

NASA Technical Reports Server (NTRS)

The paper suggests that the 'tactics and strategies' notion is a highly suitable paradigm to describe the cognitive involvement of human operators in advanced aviation systems (far more suitable than classical functional analysis), and that the workload and situational awareness of operators are intimately associated with the planning and execution of their tactics and strategies. If system designers have muddled views about the collective tactics and strategies to be used during operation, they will produce sub-optimum designs. If operators use unproven and/or inappropriate tactics and strategies, the system may fail. The author wants to make a point that, beyond certification of people or system designs, there may be a need to go into more detail and examine (certify?) the set of tactics and strategies (i.e., the Operational Concept) which makes the people and systems perform as expected. The collective tactics and strategies determine the information flows and situational awareness which exists in organizations and composite human-machine systems. The available infrastructure and equipment (automation) enable these information flows and situational awareness, but are at the same time the constraining factor. Frequently, the tactics and strategies are driven by technology, whereas we would rather like to see a system designed to support an optimized Operational Concept, i.e., to support a sufficiently coherent, cooperative and modular set of anticipation and planning mechanisms. Again, in line with the view of MacLeod and Taylor (1993), this technology driven situation may be caused by the system designer's and operator job designer's over-emphasis on functional analysis (a mechanistic engineering concept), at the expense of a subject which does not seem to be well understood today: the role of the (human cognitive and/or automated) tactics and strategies which are embedded in composite human-machine systems. Research would be needed to arrive at a generally accepted 'planning theory' which can elevate the analysis, description and design of tactics and strategies from today's cottage industry methods to an engineering discipline. The available infrastructure and equipment (automation) enable these information flows and situational awareness, but are at the same time the constraining factor. Frequently, the tactics and strategies are driven by technology, whereas we would rather like to see a system designed to support an optimized Operational Concept, i.e., to support a sufficiently coherent, cooperative and modular set of anticipation and planning mechanisms. Again, in line with the view of MacLeod and Taylor (1993), this technology driven situation may be caused by the system designer's and operator job designer's over-emphasis on functional analysis (a mechanistic engineering concept), at the expense of a subject which does not seem to be well understood today: the role of the (human cognitive and/or automated) tactics and strategies which are embedded in composite human-machine systems. Research would be needed to arrive at a generally accepted 'planning theory' which can evaluate the analysis, description and design of tactics and strategies from today's cottage industry methods to an engineering discipline.

Koelman, Hartmut

1994-01-01

86

Weatherizing America  

ScienceCinema

As Recovery Act money arrives to expand home weatherization programs across the country, Zachary Stewart of Phoenix, Ariz., and others have found an exciting opportunity not only to start working again, but also to find a calling.

Stewart, Zachary; Bergeron, T.J.; Barth, Dale; Qualis, Xavier; Sewall, Travis; Fransen, Richard; Gill, Tony;

2013-05-29

87

Weatherizing America  

SciTech Connect

As Recovery Act money arrives to expand home weatherization programs across the country, Zachary Stewart of Phoenix, Ariz., and others have found an exciting opportunity not only to start working again, but also to find a calling.

Stewart, Zachary; Bergeron, T.J.; Barth, Dale; Qualis, Xavier; Sewall, Travis; Fransen, Richard; Gill, Tony

2009-01-01

88

Weather Creator  

NSDL National Science Digital Library

This project explores factors that help create severe winter weather. An interactive simulation provides hands-on experience, followed by guiding questions and resource exploration. Form groups of three. Explore the following simulation: Weather Maker Simulator Use the simulation to answer the following questions on paper. 1. In general, when are winds formed? 2. When winds are blowing, how can you get them to stop? 3. What can you do to make it rain or even snow? 4. Does it always snow when ...

Kshumway

2009-09-28

89

Weathering Experiment  

NSDL National Science Digital Library

After discussing weathering and erosion in class, students are asked to do a small amount of research on different types of chemical weathering, physical weathering, and erosion processes (mostly out of their textbook). Outside of class students then dirty at least four similar dishes with the same type, thickness and aerial extent of food, preferably baked on to ensure maximum stick. One dish is set aside as a control (no weathering or erosion will occur for that dish). For each of the remaining three dishes, students devise an experiment that mimics some sort of chemical weathering, physical weathering, or erosion process (freeze/thaw, sand abrasion, oxidation, etc.). Prior to the experiments, the thickness of food is measured. Experiments are timed, and at the end of the experiment each plate is turned over to determine how much which method removed the greatest aerial extent of food. Experimental results are compared to the control plate to determine the actual effectiveness. Erosion/weathering rates are determined by dividing the thickness of food removed by the experimental time. Students then calculate how long it would take to remove a pile of food the size of the Geology building (assume a 50 m radius sphere), and to remove an amount of food equivalent to the depth of the Grand Canyon. Students then compare these results to rock erosion and weathering rates, performing similar calculations using these "real" rates (see the full project description for details). Photos of each step and the scientists are encouraged in their 2-3 page writeup.

Stelling, Pete

90

Exploring Weather  

NSDL National Science Digital Library

Second Grade Standard 3: Students will develop an understanding of their environment. Objective 2: Observe and describe weather. Indicator a: Observe and describe patterns of change in weather. Monday, February 1st: Look at the five-day forecast for Salt Lake City, Utah at Five day forecasts. The high temperature for the day will be in red and the low temperature will be in blue. Make sure you look at the temperature listed in degrees Farenheit (F) not degrees Celcius (C). Make ...

Miss Emily

2010-01-29

91

Gravestone Weathering  

NSDL National Science Digital Library

In this activity (located on pages 9-14 of PDF), learners visit a cemetery to examine the distinguishing characteristics of rock weathering. After researching stone weathering and acid rain, learners apply their knowledge to collect data related to chemical decomposition and physical disintegration at a cemetery site. This detailed lesson guide includes tips for educators, pre/post activity suggestions, hands-outs, and background information.

Wiberg, Leanne; History, National M.

2000-01-01

92

ALTERNATIVE PEST CONTROL TACTICS IN PECAN  

Technology Transfer Automated Retrieval System (TEKTRAN)

We are developing entomopathogenic nematodes or fungi as alternative tactics for control of the pecan weevil. When the Italian strain of Steinernema carpocapsae was tested in the field, up to 80% weevil mortality was observed in 2004, but only 50% in 2005. To enhance weevil suppression superior ne...

93

Tactical Mobile Mesh Network System Design  

Microsoft Academic Search

Tactical mobile mesh systems are wireless communication networks characterized by: harsh propagation channels and interference, frequent and rapid changes in the network topology, the requirement for very robust, low latency multimedia information decimation, and no centralized network control. In this paper we describe a technology testbed designed to address these challenges. The testbed is based on advanced waveform technologies, modern

Adam Blair; Thomas Brown; Keith M. Chugg; Mark Johnson

2007-01-01

94

Tactical defense initiative for Western Europe  

Microsoft Academic Search

This article shows while the ABM Treaty does not address defensive systems capable of intercepting tactical ballistic missiles, the treaty's provisions if adhered to, would affect the capability of such an ABM system in important way. It is clear that some proposed systems, if deployed in an ATBM role, would violate the treaty. In essence, these systems include most of

Daalder

1987-01-01

95

Optimal sonar tactics over uncertain sediments  

NASA Astrophysics Data System (ADS)

Tactical patterns for monostatic sensors were developed during the Cold War for deep, uniform underwater environments, where a simple median detection range defined a fixed spacing between search ladder legs. Acoustic conditions in littoral environments are so complex that spatial variability of bottom sediment properties destroys the simple homogeneous assumption associated with standard tactical search concepts. Genetic algorithms (GAs) have been applied to this problem to produce near-optimal, non-standard search tracks for monostatic mobile sensors that maximize probability of detection in such inhomogeneous environments. The present work describes a new capability called SPEAR (search planning with environmentally adaptive response) that adds tactical adaptation to search paths in a complex, littoral environment, as new in situ backscattering and bottom loss information becomes available. This presentation reviews the GA approach and discusses tactical adaptation to uncertain bottom sediment properties. The results show that easily implemented dynamic changes in active pulse depression angles and frequencies can produce significant improvement in detection performance in a complex littoral area. [Work supported by NAVSEA.

Delbalzo, Donald R.; Powers, William J.; Cole, Bernie F.

2005-09-01

96

Airborne Tactical Free-Electron Laser  

SciTech Connect

The goal of 100 kilowatts (kW) of directed energy from an airborne tactical platform has proved challenging due to the size and weight of most of the options that have been considered. However, recent advances in Free-Electron Lasers appear to offer a solution along with significant tactical advantages: a nearly unlimited magazine, time structures for periods from milliseconds to hours, radar like functionality, and the choice of the wavelength of light that best meets mission requirements. For an Airborne Tactical Free-Electron Laser (ATFEL) on a platforms such as a Lockheed C-130J-30 and airships, the two most challenging requirements, weight and size, can be met by generating the light at a higher harmonic, aggressively managing magnet weights, managing cryogenic heat loads using recent SRF R&D results, and using FEL super compact design concepts that greatly reduce the number of components. The initial R&D roadmap for achieving an ATFEL is provided in this paper. Performing this R&D is expected to further reduce the weight, size and power requirements for the FELs the Navy is currently developing for shipboard applications, as well as providing performance enhancements for the strategic airborne MW class FELs. The 100 kW ATFEL with its tactical advantages may prove sufficiently attractive for early advancement in the queue of deployed FELs.

Roy Whitney; George Neil

2007-02-01

97

Attitudes towards questionable negotiation tactics in Turkey  

Microsoft Academic Search

Purpose – The purpose of this paper is to examine the impact of individualism-collectivism, trust, and ethical ideology on ethically questionable negotiation tactics, such as pretending, deceiving and lying, in Turkey. Design\\/methodology\\/approach – Survey questionnaires translated from English to Turkish were administered to 400 respondents, of whom 379 fully completed the questionnaires. Findings – The research empirically corroborated a classification

Ahmet Erku?; Moshe Banai

2011-01-01

98

Survival Tactics for the Warrior Librarian  

ERIC Educational Resources Information Center

In spite of nationwide budget cuts, the potential of school libraries to positively impact student achievement has never been higher. Schools cannot afford to do without strong school library programs. It is the professional responsibility of librarians to fight for their programs, using warrior tactics to survive and thrive through tough economic…

Collins, Cathy

2010-01-01

99

Graduating Tactics: theorizing plagiarism as consumptive practice  

Microsoft Academic Search

Plagiarism is a growing concern to educators in the tertiary sector, although currently its appearances in the higher education literature have predominantly been concerned with its prevention and management. This article draws on the poststructuralist theory of consumption developed by Michel de Certeau, to consider plagiarism as a tactic deployed by consumers in their attempts to negotiate the demands of

SUE SALTMARSH

2004-01-01

100

Space Weather  

NSDL National Science Digital Library

With three levels to choose from on each page - beginner, intermediate or advanced - this site provides information on Space Weather and the terms scientists use to describe the everchanging conditions in space. Explosions on the Sun create storms of radiation, fluctuating magnetic fields, and swarms of energetic particles. These phenomena travel outward through the Solar System with the solar wind. Upon arrival at Earth, they interact in complex ways with Earth's magnetic field, creating Earth's radiation belts and the Aurora. Some space weather storms can damage satellites, disable electric power grids, and disrupt cell phone communications systems. This site provides images, activities, and interesting facts about all of these events.

2004-02-06

101

Wild Weather  

NSDL National Science Digital Library

In this online, interactive module, students learn about severe weather (thunderstorms, hurricanes, tornadoes, and blizzards) and the key features for each type of "wild weather" using satellite images. The module is part of an online course for grades 7-12 in satellite meteorology, which includes 10 interactive modules. The site also includes lesson plans developed by teachers and links to related resources. Each module is designed to serve as a stand-alone lesson, however, a sequential approach is recommended. Designed to challenge students through the end of 12th grade, middle school teachers and students may choose to skim or skip a few sections.

102

Weather Forecasting  

NSDL National Science Digital Library

Weather Forecasting is one of several online guides produced by the Weather World 2010 project at the University of Illinois. These guides use multimedia technology and the dynamic capabilities of the web to incorporate text, colorful diagrams, animations, computer simulations, audio, and video to introduce topics and concepts in the atmospheric sciences. This module introduces forecast methods and the numerous factors one must consider when attempting to make an accurate forecast. Sections include forecasting methods for different scenarios, surface features affecting forecasting, forecasting temperatures for day and night, and factors for forecasting precipitation.

2010-01-01

103

Putting Weather into Weather Derivatives  

NASA Astrophysics Data System (ADS)

Just as weather forecasting has a colorful and often farsighted history within geophysics, financial mathematics has a long and turbulent history within mathematics. Thus it is no surprise that the intersection of real physics and real financial mathematics provides a rich source of problems and insight in both fields. This presentation targets open questions in one such intersection: quantifying ``weather risk.'' There is no accepted (operational) method for including deterministic information from simulation models (numerical weather forecasts, either best guess or by ensemble forecasting methods), into the stochastic framework most common within financial mathematics. Nor is there a stochastic method for constructing weather surrogates which has been proven successful in application. Inasmuch as the duration of employable observations is short, methods of melding short term, medium-range and long term forecasts are needed. On these time scales, model error is a substantial problem, while many methods of traditional statistical practice are simply inappropriate given our physical understanding of the system. A number of specific open questions, along with a smaller number of potential solutions, will be presented. >http://www.maths.ox.ac.uk/~lenny/WeatherRisk

Smith, L. A.; Smith, L. A.

2001-12-01

104

Winter Weather  

MedlinePLUS

... warm, sweet beverages. Avoid drinks with alcohol. Provide engineering controls such as radiant heaters. Types of Cold ... caused by the freezing of the skin and tissues. Frostbite can cause permanent damage to the body, ...

105

Wacky Weather  

NSDL National Science Digital Library

This 5-lesson unit gives students practice in using calculating, graphing and modeling skills to analyze varoius aspects of weather. Students calculate fractions of a set of rainfall data, graph damage costs of selected hurricanes, and make Venn diagrams to compare droughts and hurricanes. Visuals and student handouts are provided.

Barbara Chichetti

2002-01-01

106

Today's Weather  

NSDL National Science Digital Library

This activity is part of Planet Diary and contains an online exploration of weather maps. Students use current maps to learn about and locate different features such as low-pressure areas and fronts. They then explore how these are related to severe storms.

107

Wonderful Weather  

NSDL National Science Digital Library

In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind. These activities can be used individually or as a group for a lesson on weather. Note: boiling water is required for this activity; adult supervision required.

Mission Science Workshop

2013-01-01

108

Weather Stations  

NSDL National Science Digital Library

This is a series of seven brief activities about Jupiter's atmosphere and weather. Learners will look at Jupiter's distinct banded appearance, violent storms, and clouds of many different colors. The activities are part of Explore! Jupiter's Family Secrets, a series designed to engage children in space and planetary science in libraries and informal learning environments.

109

Tacoma Power Weatherization  

E-print Network

Tacoma Power Weatherization Specifications August 2009 KnowYourPower.com | #12;TACOMA POWER WEATHERIZATION SPECIFICATIONS 2009 edition Page 2 #12;TACOMA POWER WEATHERIZATION SPECIFICATIONS 2009 edition

110

Genetically modified plants for tactical systems applications  

NASA Astrophysics Data System (ADS)

Plants are ubiquitous in the environment and have the ability to respond to their environment physiologically and through altered gene expression profiles (they cannot walk away). In addition, plant genetic transformation techniques and genomic information in plants are becoming increasingly advanced. We have been performing research to express the jellyfish green fluorescent protein (GFP) in plants. GFP emits green light when excited by blue or UV light. In addition, my group and collaborators have developed methods to detect GFP in plants by contact instruments and at a standoff. There are several tactical uses for this technology. Some obvious applications are using plants as sentinels for detecting biological and chemical warfare agents or their derivatives from a remote platform, as well as detecting explosives. Another tactical application is covert monitoring using individual plants. Different methods to detect GFP in transgenic plants will be discussed.

Stewart, C. Neal, Jr.

2002-08-01

111

Operational space support to tactical forces  

NASA Astrophysics Data System (ADS)

The use of military spacecraft for supporting strategic forces is discussed emphasizing the requirements of ground mobile forces and the availability of space-based resources. Specific attention is given to the incompatibility of the Milsatcom communications network and military needs for combat situations. The need for assured access to tactical communications free of electronic jammers is identified, and the characteristics of tactical user equipment are set forth. The idea of a 'Space Hummer' is proposed which receives and processes multifrequency data in a high-mobility multipurpose wheeled vehicle. The proposed vehicle is described in terms of existing and deficient technologies required for its implementation, and scenarios for its use in covert and other operations are reviewed. Important technological challenges for the use of space support include reduced antenna sizes, data fusion, and wideband connectivity, and some of these areas are currently being investigated.

Jensen, Owen E.

112

INTELLIGENT AGENT FOR AIRCRAFT COLLISION AVOIDANCE  

E-print Network

authority lies with the air traffic controllers Enhancement of current Air Traffic Control (ATC) safety (GA) A new way of managing air traffic Departure from the highly structured system to a more flexible and avoid regions of severe weather Terrain Agent prevent Controlled Flight Into Terrain (CFIT) Traffic

Valasek, John

113

Provisioning tactical MILSATCOM through DVB augmentation  

Microsoft Academic Search

The past twenty years have seen exponential growth in tactical data exchange on the battlefield. The Information Exchange Requirements (IERs) of the dasianetwork enabledpsila soldier, when combined with the greater dispersion and mobility expected of land forces operations, threaten to overwhelm traditional line-of-sight (LoS) HF, VHF and UHF networks and the spectrum management systems needed to support them. Recent advances

Taj A. Sturman; Peter Dingley; Mark D. J. Bowyer; Neil R. Petfield; Martin Moseley; Godred Fairhurst

2008-01-01

114

Multiple Adaptive Agents for Tactical Driving  

Microsoft Academic Search

Recent research in automated highway systems has ranged from low-level vision-based controllers to high-level route-guidance software. However, there is currently no system for tactical-level reasoning. Such a system should address tasks such as passing cars, making exits on time, and merging into a traffic stream. Many previous approaches have attempted to hand construct large rule-based systems which capture the interactions

Rahul Sukthankar; Shumeet Baluja; John Hancock

1998-01-01

115

Multiple Adaptive Agents for Tactical Driving  

Microsoft Academic Search

Recent research in automated highway systems has ranged from low-level vision-based con- trollers to high-level route-guidance software. However, there is currently no system for tactical-level reasoning. Such a system should address tasks such as passing cars, making exits on time, and merging into a trac stream. Many previous approaches have attempted to hand construct large rule-based sys- tems which capture

Rahul Sukthankar; Shumeet Baluja; John Hancock

1998-01-01

116

Tactical Missile-Gse Design Interfaces  

Microsoft Academic Search

This paper discusses some of the design interfaces in the missile and ground support equipment, particularly the launcher, that must be considered if the tactical weapon system is to have the maximum effectiveness for the least expenditure. Typical illustrations of the trade-offs involved in surface-to-surface, surface-to-air, and air-to-surface weapon systems are presented, based upon preliminary design experience derived from many

John M. Allison

1963-01-01

117

Weather Cycles  

NSDL National Science Digital Library

We are professionals in the teaching profession. We designed this project for children ranging from 4th grade to 6th grade. This project explores factors that help create severe winter weather. An interactive simulation provides hands-on experience, followed by guiding questions and resource exploration. YOU WILL NEED: Paper with copied questions, Overhead projector and Students broken up into groups of 3. Form groups of three. Have each group explore the following simulation: Weather Maker Simulator Have students use the simulation to answer the following questions on paper. They should be discussing the questions in their groups. 1. In general, when are winds formed? 2. When winds are blowing, how can you get them to stop? 3. What ...

Mitchell, Mrs.

2010-09-23

118

Weather Watchers  

NSDL National Science Digital Library

Students are introduced to some essential meteorology concepts so they more fully understand the impact of meteorological activity on air pollution control and prevention. First, they develop an understanding of the magnitude and importance of air pressure. Next, they build a simple aneroid barometer to understand how air pressure information is related to weather prediction. Then, students explore the concept of relative humidity and its connection to weather prediction. Finally, students learn about air convection currents and temperature inversions. In an associated literacy activity, students learn how scientific terms are formed using Latin and Greek roots, prefixes and suffixes, and are introduced to the role played by metaphor in language development. Note: Some of these activities can be conducted simultaneously with the air quality activity (What Color Is Your Air Today?) of Air Pollution unit, Lesson 1.

Integrated Teaching And Learning Program

119

Weather Observations  

NSDL National Science Digital Library

We will be observing the weather in our enviornment. Post your observations. Take a hike! Tell us what you see! Make sure and note the date/time/season. Take a walk in your neighboorhood- what signs show you the current season? Vacation? Make observations about the place you visited. Make obseravtions every week! Keep a journal about the changes you observe! Winter Storm ImageSeasonal ChangesAround the WorldSeasonsSeasons of the Year ...

sarahnp

2011-07-18

120

From the laboratory to the soldier: providing tactical behaviors for Army robots  

NASA Astrophysics Data System (ADS)

The Army Future Combat System (FCS) Operational Requirement Document has identified a number of advanced robot tactical behavior requirements to enable the Future Brigade Combat Team (FBCT). The FBCT advanced tactical behaviors include Sentinel Behavior, Obstacle Avoidance Behavior, and Scaled Levels of Human-Machine control Behavior. The U.S. Army Training and Doctrine Command, (TRADOC) Maneuver Support Center (MANSCEN) has also documented a number of robotic behavior requirements for the Army non FCS forces such as the Infantry Brigade Combat Team (IBCT), Stryker Brigade Combat Team (SBCT), and Heavy Brigade Combat Team (HBCT). The general categories of useful robot tactical behaviors include Ground/Air Mobility behaviors, Tactical Mission behaviors, Manned-Unmanned Teaming behaviors, and Soldier-Robot Interface behaviors. Many DoD research and development centers are achieving the necessary components necessary for artificial tactical behaviors for ground and air robots to include the Army Research Laboratory (ARL), U.S. Army Research, Development and Engineering Command (RDECOM), Space and Naval Warfare (SPAWAR) Systems Center, US Army Tank-Automotive Research, Development and Engineering Center (TARDEC) and non DoD labs such as Department of Energy (DOL). With the support of the Joint Ground Robotics Enterprise (JGRE) through DoD and non DoD labs the Army Maneuver Support Center has recently concluded successful field trails of ground and air robots with specialized tactical behaviors and sensors to enable semi autonomous detection, reporting, and marking of explosive hazards to include Improvised Explosive Devices (IED) and landmines. A specific goal of this effort was to assess how collaborative behaviors for multiple unmanned air and ground vehicles can reduce risks to Soldiers and increase efficiency for on and off route explosive hazard detection, reporting, and marking. This paper discusses experimental results achieved with a robotic countermine system that utilizes autonomous behaviors and a mixed-initiative control scheme to address the challenges of detecting and marking buried landmines. Emerging requirements for robotic countermine operations are outlined as are the technologies developed under this effort to address them. A first experiment shows that the resulting system was able to find and mark landmines with a very low level of human involvement. In addition, the data indicates that the robotic system is able to decrease the time to find mines and increase the detection accuracy and reliability. Finally, the paper presents current efforts to incorporate new countermine sensors and port the resulting behaviors to two fielded military systems for rigorous assessing.

Knichel, David G.; Bruemmer, David J.

2008-04-01

121

The Use of Data-Mining for the Automatic Formation of Tactics   

E-print Network

As functions which further the state of a proof in automated theorem proving, tactics are an important development in automated deduction. This thesis describes a method to tackle the problem of tactic formation. Tactics ...

Duncan, Hazel

2007-01-01

122

Mountain Weather  

NSDL National Science Digital Library

Mountains can be awe-inspiring both for the vistas they provide and for the weather events and long-term climate systems they support. This interactive feature illustrates how a moisture-laden air mass interacts with a mountain slope to produce characteristic patterns of precipitation over the mountain and surrounding areas. Viewers can see how clouds and precipitation form as the air mass ascends the windward side of the peak, and observe the rain shadow created on the leeward side by the descending, warmed, and moisture-depleted air. A background essay and list of discussion questions supplement the interactive feature.

123

Enhanced Weather Radar (EWxR) System  

NASA Technical Reports Server (NTRS)

An airborne weather radar system, the Enhanced Weather Radar (EWxR), with enhanced on-board weather radar data processing was developed and tested. The system features additional weather data that is uplinked from ground-based sources, specialized data processing, and limited automatic radar control to search for hazardous weather. National Weather Service (NWS) ground-based Next Generation Radar (NEXRAD) information is used by the EWxR system to augment the on-board weather radar information. The system will simultaneously display NEXRAD and on-board weather radar information in a split-view format. The on-board weather radar includes an automated or hands-free storm-finding feature that optimizes the radar returns by automatically adjusting the tilt and range settings for the current altitude above the terrain and searches for storm cells near the atmospheric 0-degree isotherm. A rule-based decision aid was developed to automatically characterize cells as hazardous, possibly-hazardous, or non-hazardous based upon attributes of that cell. Cell attributes are determined based on data from the on-board radar and from ground-based radars. A flight path impact prediction algorithm was developed to help pilots to avoid hazardous weather along their flight plan and their mission. During development the system was tested on the NASA B757 aircraft and final tests were conducted on the Rockwell Collins Sabreliner.

Kronfeld, Kevin M. (Technical Monitor)

2003-01-01

124

The TACTIC atmospheric Cherenkov imaging telescope  

NASA Astrophysics Data System (ADS)

The TACTIC (TeV Atomospheric Cherenkov Telescope with Imaging Camera) ?-ray telescope, equipped with a light collector of area ˜9.5m and a medium resolution imaging camera of 349 pixels, has been in operation at Mt. Abu, India, since 2001. This paper describes the main features of its various subsystems and its overall performance with regard to (a) tracking accuracy of its two-axes drive system, (b) spot size of the light collector, (c) back-end signal processing electronics and topological trigger generation scheme, (d) data acquisition and control system and (e) relative and absolute gain calibration methodology. Using a trigger field-of-view of 11×11 pixels (˜3.4×3.4), the telescope records a cosmic ray event rate of ˜2.5Hz at a typical zenith angle of 15. Monte Carlo simulation results are also presented in the paper for comparing the expected performance of the telescope with actual observational results. The consistent detection of a steady signal from the Crab Nebula above ˜1.2TeV energy, at a sensitivity level of ˜5.0? in ˜25h, alongwith excellent matching of its energy spectrum with that obtained by other groups, reassures that the performance of the TACTIC telescope is quite stable and reliable. Furthermore, encouraged by the detection of strong ?-ray signals from Mrk 501 (during 1997 and 2006 observations) and Mrk 421 (during 2001 and 2005 2006 observations), we believe that there is considerable scope for the TACTIC telescope to monitor similar TeV ?-ray emission activity from other active galactic nuclei on a long-term basis.

Koul, R.; Tickoo, A. K.; Kaul, S. K.; Kaul, S. R.; Kumar, N.; Yadav, K. K.; Bhatt, N.; Venugopal, K.; Goyal, H. C.; Kothari, M.; Chandra, P.; Rannot, R. C.; Dhar, V. K.; Koul, M. K.; Kaul, R. K.; Kotwal, S.; Chanchalani, K.; Thoudam, S.; Chouhan, N.; Sharma, M.; Bhattacharyya, S.; Sahayanathan, S.

2007-08-01

125

Overview how adenocarcinoma cancer cells avoid immune- and chemotherapy-induced apoptosis  

Microsoft Academic Search

This review describes some aspects of uncontrolled tumor growth and development. In the past, it has been shown that colon adenocarcinomas use several tactics to avoid cell deletion and to maintain cell viability. In particular, colorectal cancer cells resist death ligands-induced apoptosis by expressing anti- apoptotic proteins. By direct interaction with FADD, the FLIP protein inhibits the signal transmission from

Pajak B; Orzechowski A

2006-01-01

126

An Antitrust Primer: How To Avoid Bid Rigging and Other Collusions.  

ERIC Educational Resources Information Center

Shows school business officials how to detect and avoid bid rigging, price fixing, and other types of unlawful collusion prohibited by the Sherman Antitrust Act. School administrators should expand the list of bidders, consolidate purchases as a defensive tactic, consider reletting the contract in tie-bid situations, recognize the elements of…

Connolly, Robert E.

1997-01-01

127

Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus)  

E-print Network

Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus) Bryan D tactics in bluegill sunfish (Lepomis macrochirus). Bluegill males are characterized by three alternative

Neff, Bryan D.

128

Influence points for tactical information in navigation meshes  

Microsoft Academic Search

Good artificial intelligence for strategy and first person shooter games requires tactical information. Tactical information assists agents in choosing appropriate places to place vulnerable resources, safe paths for moving through the world, and the most effective places to attack the enemy. Unfortunately, providing this information can be very expensive, as it typically requires keeping one or more full map arrays

Frederick W. P. Heckel; G. Michael Youngblood; D. Hunter Hale

2009-01-01

129

Skill and tactic analysis for table tennis matches  

Microsoft Academic Search

Due to complexity, multiplicity and randomness of table tennis matches, it is necessary to develop some skill and tactic diagnostic models especially an efficient scoring model to get some skill and tactics data for table tennis matches. A scoring model is developed for table tennis matches based on video image processing technology. An input match video is used to analysis

Ye-peng Guan; Yong Ye; Jing-jing Li; Jing Si; Hui Zhang

2011-01-01

130

AIMS taking on roles to support tactical information dominance  

Microsoft Academic Search

Military solutions to enable information sharing are being developed that will fundamentally change future concepts of operation. The development of sophisticated approaches to managing this information is a key element to reliably disseminate valued information to the tactical edge. This paper will describe the merging of two such systems to support these tactical edge users; the Air Force Research Laboratory

Philip Joseph Ceccio; Robert G. Hillman

2007-01-01

131

Research issues in autonomous control of tactical UAVs  

Microsoft Academic Search

This paper summarizes the enabling technologies for an autonomous tactical unmanned aerial vehicle (UAV). Current technologies are adequate for semi-autonomous UAVs that operate in a relatively structured environment. For tactical UAVs in a rapidly changing uncertain environment the present techniques are inadequate. The essence of autonomous control is rapid in-flight replanning under uncertainty. This is cast as a large optimization

P. R. Chandler; M. Pachter

1998-01-01

132

Behavioural Thermoregulatory Tactics in Lacustrine Brook Charr, Salvelinus fontinalis  

PubMed Central

The need to vary body temperature to optimize physiological processes can lead to thermoregulatory behaviours, particularly in ectotherms. Despite some evidence of within-population phenotypic variation in thermal behaviour, the occurrence of alternative tactics of this behaviour is rarely explicitly considered when studying natural populations. The main objective of this study was to determine whether different thermal tactics exist among individuals of the same population. We studied the behavioural thermoregulation of 33 adult brook charr in a stratified lake using thermo-sensitive radio transmitters that measured hourly individual temperature over one month. The observed behavioural thermoregulatory patterns were consistent between years and suggest the existence of four tactics: two “warm” tactics with both crepuscular and finer periodicities, with or without a diel periodicity, and two “cool” tactics, with or without a diel periodicity. Telemetry data support the above findings by showing that the different tactics are associated with different patterns of diel horizontal movements. Taken together, our results show a clear spatio-temporal segregation of individuals displaying different tactics, suggesting a reduction of niche overlap. To our knowledge, this is the first study showing the presence of behavioural thermoregulatory tactics in a vertebrate. PMID:21490935

Bertolo, Andrea; Pépino, Marc; Adams, Julie; Magnan, Pierre

2011-01-01

133

Toward Optimization of Multimodal User Interfaces for Tactical Audio Applications  

Microsoft Academic Search

Tactical audio uses audio feedback to facilitate the precise and accurate positioning of an object with respect to some other object. Existing solutions in pointing and trajectory based Human Computer Interface (HCI) tasks have primarily explored visual feedback, sometimes in rather limited conditions. In this paper we have examined different sonification paradigms for tactical audio to improve the accuracy of

Zeljko Obrenovic; Dusan Starcevic; Emil Jovanov

2002-01-01

134

Time for Europeans to Debate the Presence of Tactical Nukes  

ERIC Educational Resources Information Center

The superpowers are making decisions about tactical and nuclear weapons which may be immutable for Europe for the next 20 years. The maintenance of arsenals for tactical and nuclear weapons should be discussed by more than just the closed circle of professional strategists-by journalists, politicians, philosophers and thoughtful citizens. (BT)

Miettinen, Jorma K.

1976-01-01

135

The evolution of human intrasexual competition: Tactics of mate attraction  

Microsoft Academic Search

Darwin's theory of sexual selection suggests that individuals compete with members of their own sex for reproductively relevant resources held by members of the opposite sex. Four empirical studies were conducted to identify tactics of intrasexual mate competition and to test four evolution-based hypotheses. A preliminary study yielded a taxonomy of tactics. Study 1 used close-friend observers to report performance

David M. Buss

1988-01-01

136

AGATE: Adversarial Game Analysis for Tactical Evaluation  

NASA Technical Reports Server (NTRS)

AGATE generates a set of ranked strategies that enables an autonomous vehicle to track/trail another vehicle that is trying to break the contact using evasive tactics. The software is efficient (can be run on a laptop), scales well with environmental complexity, and is suitable for use onboard an autonomous vehicle. The software will run in near-real-time (2 Hz) on most commercial laptops. Existing software is usually run offline in a planning mode, and is not used to control an unmanned vehicle actively. JPL has developed a system for AGATE that uses adversarial game theory (AGT) methods (in particular, leader-follower and pursuit-evasion) to enable an autonomous vehicle (AV) to maintain tracking/ trailing operations on a target that is employing evasive tactics. The AV trailing, tracking, and reacquisition operations are characterized by imperfect information, and are an example of a non-zero sum game (a positive payoff for the AV is not necessarily an equal loss for the target being tracked and, potentially, additional adversarial boats). Previously, JPL successfully applied the Nash equilibrium method for onboard control of an autonomous ground vehicle (AGV) travelling over hazardous terrain.

Huntsberger, Terrance L.

2013-01-01

137

The Weather Dude  

NSDL National Science Digital Library

The Weather Dude is a weather education Web site offered by meteorologist Nick Walker of The Weather Channel. For kids, the site offers a great online textbook entitled Weather Basics, which explains everything from precipitation to the seasons, using simple text and fun graphics. Other fun things for kids include weather songs, questions and quizzes, weather proverbs, and more. Teachers are also provided with helpful resources such as weather activity sheets and printable blank maps, as well as many other links to weather forecasts and information that will help make teaching about weather fun.

Walker, Nick.

2002-01-01

138

External Resource: Mechanical Weathering  

NSDL National Science Digital Library

A student activity with teacher's sheet, to give the students an opportunity to realize that all rocks weather mechanically and each specific rock type has its own particular rate of weathering. Mechanical weathering is the process of breaking down bedroc

1900-01-01

139

Robot collision avoidance  

Microsoft Academic Search

Planning for collision avoidance is essential in any robot application, but for most single robot cells the ancillary equipment and tooling remain in fixed and known positions relative to the cell and thus collision avoidance strategies can be planned once only, at the start of program development. With multiple robot cells not only do the robots have to avoid the

Paul Brunn

1996-01-01

140

The root causes of the ``Black pad'' phenomenon and avoidance tactics  

NASA Astrophysics Data System (ADS)

The “black pad” phenomenon of Ni-P electroless plating has been one of the serious electronics failures in the market although this plating is known to be a useful barrier coating against oxidation. To understand the mechanism of this phenomenon, the weak interfaces of Ni-P plating soldered with leaded and lead-free solders have been analyzed with the aid of transmission-electron microscopy. Two causes of degradation are described in this paper. One is the initial degraded Ni-P plating covered with gold thin plating. In this case, the surface of the Ni-P plating was locally corroded to form a sparse amorphous oxide structure beneath the gold plating. The other is the extreme interface reaction between the Ni-P plating and solders. Based on the findings, it was concluded that the quality of the Au/Ni-P plating and the process conditions of soldering are to be carefully controlled.

Suganuma, Katsuaki; Kim, Kuen-Soo

2008-06-01

141

Controlling The Global Weather.  

NASA Astrophysics Data System (ADS)

the weather controller is extremely complex, the existence of the required technology is plausible in the time range of several decades.While the concept of controlling the weather has often appeared in science fiction literature, this statement of the problem provides a scientific basis and a system architecture to actually implement global weather control. Large-scale weather control raises important legal and ethical questions. The nation that controls its own weather will perforce control the weather of other nations. Weather "wars" are conceivable. An international treaty may be required, limiting the use of weather control technology.

Hoffman, Ross N.

2002-02-01

142

Enabling information management systems in tactical network environments  

NASA Astrophysics Data System (ADS)

Net-Centric Information Management (IM) and sharing in tactical environments promises to revolutionize forward command and control capabilities by providing ubiquitous shared situational awareness to the warfighter. This vision can be realized by leveraging the tactical and Mobile Ad hoc Networks (MANET) which provide the underlying communications infrastructure, but, significant technical challenges remain. Enabling information management in these highly dynamic environments will require multiple support services and protocols which are affected by, and highly dependent on, the underlying capabilities and dynamics of the tactical network infrastructure. In this paper we investigate, discuss, and evaluate the effects of realistic tactical and mobile communications network environments on mission-critical information management systems. We motivate our discussion by introducing the Advanced Information Management System (AIMS) which is targeted for deployment in tactical sensor systems. We present some operational requirements for AIMS and highlight how critical IM support services such as discovery, transport, federation, and Quality of Service (QoS) management are necessary to meet these requirements. Our goal is to provide a qualitative analysis of the impact of underlying assumptions of availability and performance of some of the critical services supporting tactical information management. We will also propose and describe a number of technologies and capabilities that have been developed to address these challenges, providing alternative approaches for transport, service discovery, and federation services for tactical networks.

Carvalho, Marco; Uszok, Andrzej; Suri, Niranjan; Bradshaw, Jeffrey M.; Ceccio, Philip J.; Hanna, James P.; Sinclair, Asher

2009-05-01

143

AIAA-2001-4232 Severe Weather Avoidance Using Informed  

E-print Network

. For general aviation aircraft, the only permissible action when a thunderstorm is in the flight path is to detour around the thunderstorm. In this paper, an algorithm is developed for general aviation aircraft, which takes a radar image of the thunderstorm as the input, and determines the safest path around

Valasek, John

144

Tactical network design and simulator with Wireless Mesh Network-based Backbone architecture  

Microsoft Academic Search

For tactical networks, rapid reconfiguration and recovery of network topology is highly required. In this paper, we propose an effective tactical network architecture with WMN(Wireless Mesh Network)-based backbone. To reduce the computational and maintenance complexities of tactical networks, a hierarchical architecture is considered in the proposed architecture. The proposed architecture is called called TMB (Tactical Mesh Backbone). In addition, we

Bosung Kim; Kwangsoo Kim; Hye-lim Koo; Byeong-hee Roh; Yu-Seon Kim; Jong-Sam Jin

2010-01-01

145

Sperm investment and alternative mating tactics in bluegill sunfish (Lepomis macrochirus)  

Microsoft Academic Search

Although alternative mating tactics are found in males of many species, little is known about tactic-specific adaptations to sperm competition and the mechanism by which fertilization success is obtained. We now report on the sperm investment patterns of males that use alternative mating tactics in bluegill sunfish (Lepomis macrochirus). Bluegill males are characterized by three alternative mating tactics: parentals, sneakers,

Bryan D. Neff; Peng Fu; Mart R. Grossb

2003-01-01

146

Step 1: Human System Integration Pilot-Technology Interface Requirements for Weather Management  

NASA Technical Reports Server (NTRS)

This document involves definition of technology interface requirements for Hazardous Weather Avoidance. Technology concepts in use by the Access 5 Weather Management Work Package were considered. Beginning with the Human System Integration (HIS) high-level functional requirement for Hazardous Weather Avoidance, and Hazardous Weather Avoidance technology elements, HSI requirements for the interface to the pilot were identified. Results of the analysis describe (1) the information required by the pilot to have knowledge of hazardous weather, and (2) the control capability needed by the pilot to obtain hazardous weather information. Fundamentally, these requirements provide the candidate Hazardous Weather Avoidance technology concepts with the necessary human-related elements to make them compatible with human capabilities and limitations. The results of the analysis describe how Hazardous Weather Avoidance operations and functions should interface with the pilot to provide the necessary Weather Management functionality to the UA-pilot system. Requirements and guidelines for Hazardous Weather Avoidance are partitioned into four categories: (1) Planning En Route (2) Encountering Hazardous Weather En Route, (3) Planning to Destination, and (4) Diversion Planning Alternate Airport. Each requirement is stated and is supported with a rationale and associated reference(s).

2005-01-01

147

Yaquina Bay Weather & Tides  

E-print Network

Yaquina Bay Weather & Tides Clay Creech Phil Barbour #12;HMSC Weather Station #12;Temp-Humidity Sensor at Library #12;http://weather.hmsc.oregonstate.edu #12;#12;#12;#12;#12;#12;Archived Data is Available every 15 mins. #12;#12;A pyranometer measures solar radiation #12;#12;National Weather Service

Wright, Dawn Jeannine

148

Future Weather Station  

NSDL National Science Digital Library

In this activity students build dioramas of futuristic weather stations to demonstrate their knowledge of weather forecasting. They will work in groups to research modern forecasting equipment and techniques, and then build a weather station that will do something we cannot do at present (such as stopping tornadoes). They will present their dioramas and then discuss the pros and cons of controlling the weather.

149

Tactical emergency medical services: an emerging subspecialty of emergency medicine.  

PubMed

Law enforcement agencies are recognizing the need to have emergency medical care available at the scene of any incident involving tactical operations. The potentially volatile and dangerous atmosphere surrounding tactical operations is conducive to severe injury to officers, hostages, suspects, and bystanders. This mandates the immediate availability of basic and advanced life support services. However, a purely traditional approach to emergency medical services in the tactical environment may not be feasible and may expose prehospital personnel to greater danger. It also may disrupt the law enforcement mission. These factors mandate a different set of field assessment and treatment priorities. To meet these needs, selected prehospital personnel and emergency physicians train to work with and support special weapons and tactics teams. PMID:8161047

Heiskell, L E; Carmona, R H

1994-04-01

150

On investigating social dynamics in tactical opportunistic mobile networks  

NASA Astrophysics Data System (ADS)

The efficiency of military mobile network operations at the tactical edge is challenging due to the practical Disconnected, Intermittent, and Limited (DIL) environments at the tactical edge which make it hard to maintain persistent end-to-end wireless network connectivity. Opportunistic mobile networks are hence devised to depict such tactical networking scenarios. Social relations among warfighters in tactical opportunistic mobile networks are implicitly represented by their opportunistic contacts via short-range radios, but were inappropriately considered as stationary over time by the conventional wisdom. In this paper, we develop analytical models to probabilistically investigate the temporal dynamics of this social relationship, which is critical to efficient mobile communication in the battlespace. We propose to formulate such dynamics by developing various sociological metrics, including centrality and community, with respect to the opportunistic mobile network contexts. These metrics investigate social dynamics based on the experimentally validated skewness of users' transient contact distributions over time.

Gao, Wei; Li, Yong

2014-06-01

151

Behavioral tactics, dominance, and copulatory success among male fox squirrels  

Microsoft Academic Search

The behavioral tactics and mating behavior of male fox squirrels (Sciurus niger) were studied in a small population of uniquely marked, free-ranging individuals during the winter breeding season in 1986 to 1990. Twelve mating bouts were observed with an average of 5.83 males. Two alternative male reproductive tactics were active pursuit and satellite. Active-pursuit males were the most dominant squirrels

John L. Koprowski

1993-01-01

152

Australian Severe Weather  

NSDL National Science Digital Library

The Australian Severe Weather Web site is maintained by self proclaimed severe weather enthusiasts Michael Bath and Jimmy Deguara. Other weatherphobes will fully appreciate what the authors have assembled. Everything from weather images, storm news, tropical cyclone data, bush fire and wild fire information, weather observation techniques, and even video clips and Web cam links. Although these other items make the site well rounded, the extensive amount of categorized weather pictures (which are quite extraordinary) are reason enough to visit.

153

Mixtures as a fungicide resistance management tactic.  

PubMed

ABSTRACT We have reviewed the experimental and modeling evidence on the use of mixtures of fungicides of differing modes of action as a resistance management tactic. The evidence supports the following conclusions. 1. Adding a mixing partner to a fungicide that is at-risk of resistance (without lowering the dose of the at-risk fungicide) reduces the rate of selection for fungicide resistance. This holds for the use of mixing partner fungicides that have either multi-site or single-site modes of action. The resulting predicted increase in the effective life of the at-risk fungicide can be large enough to be of practical relevance. The more effective the mixing partner (due to inherent activity and/or dose), the larger the reduction in selection and the larger the increase in effective life of the at-risk fungicide. 2. Adding a mixing partner while lowering the dose of the at-risk fungicide reduces the selection for fungicide resistance, without compromising effective disease control. The very few studies existing suggest that the reduction in selection is more sensitive to lowering the dose of the at-risk fungicide than to increasing the dose of the mixing partner. 3. Although there are very few studies, the existing evidence suggests that mixing two at-risk fungicides is also a useful resistance management tactic. The aspects that have received too little attention to draw generic conclusions about the effectiveness of fungicide mixtures as resistance management strategies are as follows: (i) the relative effect of the dose of the two mixing partners on selection for fungicide resistance, (ii) the effect of mixing on the effective life of a fungicide (the time from introduction of the fungicide mode of action to the time point where the fungicide can no longer maintain effective disease control), (iii) polygenically determined resistance, (iv) mixtures of two at-risk fungicides, (v) the emergence phase of resistance evolution and the effects of mixtures during this phase, and (vi) monocyclic diseases and nonfoliar diseases. The lack of studies on these aspects of mixture use of fungicides should be a warning against overinterpreting the findings in this review. PMID:25140387

van den Bosch, Frank; Paveley, Neil; van den Berg, Femke; Hobbelen, Peter; Oliver, Richard

2014-12-01

154

Terminal weather information management  

NASA Technical Reports Server (NTRS)

Since the mid-1960's, microburst/windshear events have caused at least 30 aircraft accidents and incidents and have killed more than 600 people in the United States alone. This study evaluated alternative means of alerting an airline crew to the presence of microburst/windshear events in the terminal area. Of particular interest was the relative effectiveness of conventional and data link ground-to-air transmissions of ground-based radar and low-level windshear sensing information on microburst/windshear avoidance. The Advanced Concepts Flight Simulator located at Ames Research Center was employed in a line oriented simulation of a scheduled round-trip airline flight from Salt Lake City to Denver Stapleton Airport. Actual weather en route and in the terminal area was simulated using recorded data. The microburst/windshear incident of July 11, 1988 was re-created for the Denver area operations. Six experienced airline crews currently flying scheduled routes were employed as test subjects for each of three groups: (1) A baseline group which received alerts via conventional air traffic control (ATC) tower transmissions; (2) An experimental group which received alerts/events displayed visually and aurally in the cockpit six miles (approx. 2 min.) from the microburst event; and (3) An additional experimental group received displayed alerts/events 23 linear miles (approx. 7 min.) from the microburst event. Analyses of crew communications and decision times showed a marked improvement in both situation awareness and decision-making with visually displayed ground-based radar information. Substantial reductions in the variability of decision times among crews in the visual display groups were also found. These findings suggest that crew performance will be enhanced and individual differences among crews due to differences in training and prior experience are significantly reduced by providing real-time, graphic display of terminal weather hazards.

Lee, Alfred T.

1990-01-01

155

Supporting tactical intelligence using collaborative environments and social networking  

NASA Astrophysics Data System (ADS)

Modern military environments place an increased emphasis on the collection and analysis of intelligence at the tactical level. The deployment of analytical tools at the tactical level helps support the Warfighter's need for rapid collection, analysis, and dissemination of intelligence. However, given the lack of experience and staffing at the tactical level, most of the available intelligence is not exploited. Tactical environments are staffed by a new generation of intelligence analysts who are well-versed in modern collaboration environments and social networking. An opportunity exists to enhance tactical intelligence analysis by exploiting these personnel strengths, but is dependent on appropriately designed information sharing technologies. Existing social information sharing technologies enable users to publish information quickly, but do not unite or organize information in a manner that effectively supports intelligence analysis. In this paper, we present an alternative approach to structuring and supporting tactical intelligence analysis that combines the benefits of existing concepts, and provide detail on a prototype system embodying that approach. Since this approach employs familiar collaboration support concepts from social media, it enables new-generation analysts to identify the decision-relevant data scattered among databases and the mental models of other personnel, increasing the timeliness of collaborative analysis. Also, the approach enables analysts to collaborate visually to associate heterogeneous and uncertain data within the intelligence analysis process, increasing the robustness of collaborative analyses. Utilizing this familiar dynamic collaboration environment, we hope to achieve a significant reduction of time and skill required to glean actionable intelligence in these challenging operational environments.

Wollocko, Arthur B.; Farry, Michael P.; Stark, Robert F.

2013-05-01

156

Weather Camp 2012 "Weather and Climate All Around Us"  

E-print Network

Weather Camp 2012 "Weather and Climate All Around Us" Are you interested in the weather? Come to Weather Camp at UNL What is Weather Camp? For more information Weather camp is a week long day camp for students who will be 11-14 years old at the time of the camp Most of the activities at Weather Camp 2012

Farritor, Shane

157

BUILDING A STOCHASTIC TERMINAL AIRSPACE CAPACITY FORECAST FROM CONVECTIVE WEATHER FORECASTS  

E-print Network

of airspace is affected by the presence of hazardous weather, since aircraft must avoid unstable regions. Under clear weather conditions, these expected capacities are fairly stable and tend to reflect reality. However, under stormy weather conditions, capacity is highly Corresponding author address: Diana Michalek

Gummadi, Ramakrishna

158

Pilot weather advisor  

NASA Technical Reports Server (NTRS)

The results of the work performed by ViGYAN, Inc., to demonstrate the Pilot Weather Advisor cockpit weather data system using a broadcast satellite communication system are presented. The Pilot Weather Advisor demonstrated that the technical problems involved with transmitting significant amount of weather data to an aircraft in-flight or on-the-ground via satellite are solvable with today's technology. The Pilot Weather Advisor appears to be a viable solution for providing accurate and timely weather information for general aviation aircraft.

Kilgore, W. A.; Seth, S.; Crabill, N. L.; Shipley, S. T.; Graffman, I.; Oneill, J.

1992-01-01

159

The Weather Man  

NSDL National Science Digital Library

This project is designed to let you be "The Weather Man" and control the weather through simulation, and hands on experience, followed by guided questioning and resource exploration. Form groups of three. Explore the following simulation: Weather Maker Simulator Use the simulation to answer the following questions on paper. 1. How does humility play a role in weather? How does more or less change weather? 2. What is water vapor? Where does it come from? 3. What happens when the weather drops below zero degrees? ...

Grasser, Mrs. E.

2012-09-27

160

It pays to cheat: tactical deception in a cephalopod social signalling system  

PubMed Central

Signals in intraspecific communication should be inherently honest; otherwise the system is prone to collapse. Theory predicts, however, that honest signalling systems are susceptible to invasion by cheats, the extent of which is largely mediated by fear of reprisal. Cuttlefish facultatively change their shape and colour, an ability that evolved to avoid predators and capture prey. Here, we show that this ability is tactically employed by male mourning cuttlefish (Sepia plangon) to mislead conspecifics during courtship in a specific social context amenable to cheating 39 per cent of the time, while it was never employed in other social contexts. Males deceive rival males by displaying male courtship patterns to receptive females on one side of the body, and simultaneously displaying female patterns to a single rival male on the other, thus preventing the rival from disrupting courtship. The use of tactical deception in such a complex communication network indicates that sociality has played a key role in the cognitive evolution of cephalopods. PMID:22764112

Brown, Culum; Garwood, Martin P.; Williamson, Jane E.

2012-01-01

161

Autocalibrating vision guided navigation of unmanned air vehicles via tactical monocular cameras in GPS denied environments  

NASA Astrophysics Data System (ADS)

This thesis presents a novel robotic navigation strategy by using a conventional tactical monocular camera, proving the feasibility of using a monocular camera as the sole proximity sensing, object avoidance, mapping, and path-planning mechanism to fly and navigate small to medium scale unmanned rotary-wing aircraft in an autonomous manner. The range measurement strategy is scalable, self-calibrating, indoor-outdoor capable, and has been biologically inspired by the key adaptive mechanisms for depth perception and pattern recognition found in humans and intelligent animals (particularly bats), designed to assume operations in previously unknown, GPS-denied environments. It proposes novel electronics, aircraft, aircraft systems, systems, and procedures and algorithms that come together to form airborne systems which measure absolute ranges from a monocular camera via passive photometry, mimicking that of a human-pilot like judgement. The research is intended to bridge the gap between practical GPS coverage and precision localization and mapping problem in a small aircraft. In the context of this study, several robotic platforms, airborne and ground alike, have been developed, some of which have been integrated in real-life field trials, for experimental validation. Albeit the emphasis on miniature robotic aircraft this research has been tested and found compatible with tactical vests and helmets, and it can be used to augment the reliability of many other types of proximity sensors.

Celik, Koray

162

Testing of Tactical Performance in Youth Elite Soccer  

PubMed Central

This is a twofold study with the goals of evaluating tactical oriented game test situations for 12-13-year old highly-talented soccer players and to analyze dynamic, intra-individual developments of the players. A cross-sectional design was carried in study 1, using game test situations to measure specific tactics and creative performance for 195 expert players. The results from five evaluation criteria show that both diagnostic instruments can be used for recording football-specific creativity and game intelligence in talented young players. They produced tactical indicators that can be described as objective and valid, exhibit a sufficient degree of differentiation and are easy to record. Study 2 uses a longitudinal design to present a dynamic performance diagnostic tool for analyzing intra-individual improvements of German Soccer Foundation talents according to football-specific creativity and game intelligence. The results with respect to divergent tactical thinking clearly show that very different change processes were observed in the German Soccer Foundation players. Finally, the practical implications for the training process are discussed on the basis of both studies. Key points With game test situations it is possible to assess tactical performance as game intelligence and creativity objective, valid, with a sufficient degree of differentiation, and economically. The results with respect to game intelligence and creativity show that very different change processes were observed in the German Soccer Foundation players dependend on the bases (trainers). Current literature on tactics for school sports as well as for children’s, youth and high performance soccer at the club level should place much more emphasis on individual and group-tactical requirements in soccer. PMID:24149686

2010-01-01

163

Time Saving Tactics: Preparation Is the Key.  

ERIC Educational Resources Information Center

Describes techniques to avoid the time crunch and safety hazards associated with fitting labs into 45-minute periods. The author presents information on organizing people and things, adapting labs, and cleanup management. The author cautions against rushing a science lab to the point of compromising safety or student understanding. (PR)

DeCoster, Patricia A.

1992-01-01

164

Tactical Conflict Detection in Terminal Airspace  

NASA Technical Reports Server (NTRS)

Air traffic systems have long relied on automated short-term conflict prediction algorithms to warn controllers of impending conflicts (losses of separation). The complexity of terminal airspace has proven difficult for such systems as it often leads to excessive false alerts. Thus, the legacy system, called Conflict Alert, which provides short-term alerts in both en-route and terminal airspace currently, is often inhibited or degraded in areas where frequent false alerts occur, even though the alerts are provided only when an aircraft is in dangerous proximity of other aircraft. This research investigates how a minimal level of flight intent information may be used to improve short-term conflict detection in terminal airspace such that it can be used by the controller to maintain legal aircraft separation. The flight intent information includes a site-specific nominal arrival route and inferred altitude clearances in addition to the flight plan that includes the RNAV (Area Navigation) departure route. A new tactical conflict detection algorithm is proposed, which uses a single analytic trajectory, determined by the flight intent and the current state information of the aircraft, and includes a complex set of current, dynamic separation standards for terminal airspace to define losses of separation. The new algorithm is compared with an algorithm that imitates a known en-route algorithm and another that imitates Conflict Alert by analysis of false-alert rate and alert lead time with recent real-world data of arrival and departure operations and a large set of operational error cases from Dallas/Fort Worth TRACON (Terminal Radar Approach Control). The new algorithm yielded a false-alert rate of two per hour and an average alert lead time of 38 seconds.

Tang, Huabin; Robinson, John E.; Denery, Dallas G.

2010-01-01

165

Weather Camp 2012: Weather and Climate All Around Us Are you interested in the weather?  

E-print Network

Weather Camp 2012: Weather and Climate All Around Us Are you interested in the weather? Come to Weather Camp at UNL! What is Weather Camp? For more information Weather camp is a week-long day camp for students who will be 11-14 years old at the time of the camp. Most of the activities at Weather Camp 2012

Farritor, Shane

166

Owlie Skywarn's Weather Book  

NSDL National Science Digital Library

This is an online activity book from the National Weather Service that teaches about hazardous weather. The site also includes links to kids sites for the Federal Emergency Management Agency (FEMA) and the National Oceanic and Atmospheric Agency (NOAA).

Cris Garcia

2001-06-22

167

Favorite Demonstration: Differential Weathering  

NSDL National Science Digital Library

In this inquiry-based demonstration, the consumption of a Baby Ruth candy bar is used to nurture students' interest in chemical and physical weathering. In addition, two other concepts can be illustrated: the difference between weathering and erosion and

Francek, Mark

2002-10-01

168

Weather and Road Management  

NSDL National Science Digital Library

Anticipating and dealing with weather and the hazards it creates is a real challenge for those in departments of transportation. This module gives road and highway managers a basic understanding of meteorology and weather hazards so that they can better interpret weather forecast information used to make road management decisions. The module also highlights web-based forecast products available from the National Weather Service that can help in the decision-making process.

Comet

2008-07-21

169

Weathering and Erosion  

NSDL National Science Digital Library

This unit provides an introduction for younger students to the concepts of weathering and erosion. Topics include types of weathering (physical versus chemical), rates of weathering, and weathering products (soil). The section on erosion explains the importance of water and gravity in the process, and discusses some of the more important erosional agents such as wind, water and ice, streams and glaciers. A vocabulary list and downloadable, printable student worksheets are provided.

Medina, Philip

2010-09-07

170

Stormfax Weather Services  

NSDL National Science Digital Library

This site offers links to a variety of weather information, including national, international and local weather maps and forecasts, satellite and radar imagery, and severe weather warnings. There are also links to diverse resources such as fire maps, glacier inventories, snow depths, storm surges and tropical storms. There are reports and advisories about El Nino and La Nina. The site also has a glossary of weather terms and conversion charts for temperature, wind speed and atmospheric pressure.

2002-06-10

171

Web Weather for Kids  

NSDL National Science Digital Library

This set of resources for younger students includes activities and information on thunderstorms, tornadoes, hurricanes, blizzards and clouds: how they form, and how they impact our lives. There are games about clouds, stories about extreme weather events, and a set of activities in which students create simulations of various weather phenomena such as fog, clouds, tornadoes, and others. The 'Recipe for Weather' segment provides an overview of four atmospheric properties (temperature, pressure, volume, and density) which drive most weather phenomena.

172

Tactical physical preparation: the case for a movement-based approach.  

PubMed

Progressive injury prevention and physical preparation programs are needed in military special operations to optimize mission success and Operator quality of life and longevity. While physical risk is inherent in Special Operations, non-traumatic injuries resulting from overuse, poor biomechanics, and arbitrary exercise selection can be alleviated with proper medical care and patient education. An integrated approach to physical readiness that recognizes the continuity between rehabilitation and performance training is advocated to ensure that physiological adaptations do not come at the expense of orthopedic health or movement proficiency. Movement quality should be regularly evaluated and enforced throughout the training process to minimize preventable injuries and avoid undermining previous rehabilitative care. While fitness and proper movement are not substitutes for Operator specific tasks, they are foundational to many tactically-relevant skills. In light of how much is at stake, sports medicine care in the military, especially special operations, should parallel that which is practiced in professional and collegiate athletics. PMID:23032319

Kechijian, Doug; Rush, Stephen

2012-01-01

173

Self-care at the margins: meals and meters in migrants' diabetes tactics.  

PubMed

Drawing on ethnographic fieldwork in 2006 and 2007, this article examines Turkish migrants' everyday practices of diabetes self-management in Berlin, Germany. To avoid diabetes complications, Turkish Berliners became self-carers who altered food choices, cooking and eating practices, and made their self-care practices visible with the help of blood sugar self-testing. Rather than representing the common image of the disadvantaged migrant patient they assumed the role of "expert patients" and their self-care was a deliberate practice to make their chronic illness experience manageable and tangible where formal support by the German healthcare system was inadequate. This article thus aims to interrogate both "self" and "care" in the context of "self-care at the margins" and draw on de Certeau's tactics of the ordinary person that make everyday life habitable. PMID:23361883

Guell, Cornelia

2012-12-01

174

A survey of customers of space weather information  

NASA Astrophysics Data System (ADS)

We present an analysis of the users of space weather information based on 2783 responses to an online survey among subscribers of NOAA's Space Weather Prediction Center e-mail services. The survey requested information focused on the three NOAA space weather scales: geomagnetic storms, solar radiation storms, and radio blackouts. Space weather information is most commonly obtained for reasons of human safety and continuity or reliability of operations. The information is primarily used for situational awareness, as aid to understand anomalies, to avoid impacts on current and near-future operations by implementing mitigating strategies, and to prepare for potential near-future impacts that might occur in conjunction with contingencies that include electric power outages or GPS perturbations. Interest in, anticipated impacts from, and responses to the three main categories of space weather are quite uniform across societal sectors. Approximately 40% of the respondents expect serious to very serious impacts from space weather events if no action were taken to mitigate or in the absence of adequate space weather information. The impacts of space weather are deemed to be substantially reduced because of the availability of, and their response to, space weather forecasts and alerts. Current and near-future space weather conditions are generally highly valued, considered useful, and generally, though not fully, adequate to avoid or mitigate societal impacts. We conclude that even among those receiving space weather information, there is considerable uncertainty about the possible impacts of space weather and thus about how to act on the space weather information that is provided.

Schrijver, C. J.; Rabanal, J. P.

2013-09-01

175

Winter Weather Introduction  

E-print Network

Winter Weather Management #12;Introduction · Campus Facilities Staff · Other Campus Organizations #12;Purpose · Organize and coordinate the campus response to winter weather events to maintain campus for use by 7 AM. · Response will be modified depending upon forecast and current weather conditions. #12

Taylor, Jerry

176

Aviation weather services  

NASA Technical Reports Server (NTRS)

The primary responsibilities of the National Weather Service (NWS) are to: provide warnings of severe weather and flooding for the protection of life and property; provide public forecasts for land and adjacent ocean areas for planning and operation; and provide weather support for: production of food and fiber; management of water resources; production, distribution and use of energy; and efficient and safe air operations.

Sprinkle, C. H.

1983-01-01

177

Weather Fundamentals: Meteorology. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series, for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes) looks at how meteorologists gather and interpret current weather data collected from sources…

1998

178

Severe Weather Perceptions.  

ERIC Educational Resources Information Center

Severe weather is an element of nature that cannot be controlled. Therefore, it is important that the general public be aware of severe weather and know how to react quickly and appropriately in a weather emergency. This study, done in the community surrounding the Southern Illinois University at Carbondale, was conducted to compile and analyze…

Abrams, Karol

179

Climate and Weather  

NSDL National Science Digital Library

This video discusses the differences between climate and weather by defining and presenting examples of each. When presenting examples of weather, the video focuses on severe events and how meteorologists predict and study the weather using measurement, satellites, and radar. The climate focus is primarily on an overview of climate zones.

Geographic, National

180

Hot Weather Tips  

MedlinePLUS

... Form - A A + A You are here Home HOT Weather Tips Printer-friendly version We all suffer in hot weather. However, for elderly and disabled people and ... stress and following these tips for dealing with hot weather. Wear cool clothing: See that the person ...

181

Weather Maps in Motion  

NSDL National Science Digital Library

In this activity, students learn to interpret current weather maps. They will observe weather map loop animations on the internet, learn the concept of Zulu time (Universal Time Coordinated, UTC) and visualize the movement of fronts and air masses. They will then analyze a specific weather station model, generate a meteogram from their observations, and answer a set of questions about their observations.

Charles Burrows

182

Weathering Grade Classification of Granite Stone Monument Using Reflectance Spectroscopy  

NASA Astrophysics Data System (ADS)

Stone monument has been placed in field and exposed to rain and wind. This outdoor environment and air pollution induced weathering of stone monument. Weathering grade classification is necessary to manage and conserve stone monuments. Visual interpretation by geologist and laboratory experiments using specimens fallen off from the monument to avoid damage on the monument have been applied to classify weathering grade conventionally. Rocks and minerals absorb some particular wavelength ranges of electromagnetic energy by electronic process and vibrational process of composing elements and these phenomena produce intrinsic diagnostic spectral reflectance curve. Non-destructive technique for weathering degree assessment measures those diagnostic absorption features of weathering products and converts the depths of features related to abundance of the materials to relative weathering degree. We selected granite outcrop to apply conventional six folded weathering grade classification method using Schmidt hammer rebound teste. The correlations between Schmidt hammer rebound values and absorption depths of iron oxides such as ferric oxide in the vicinity of 0.9 micrometer wavelength and clay minerals such as illite and kaolinite in the vicinity of 2.2 micrometer wavelength, representative weathering products of granite, were analyzed. The Schmidt hammer rebound value decreased according to increase of absorption depths induced from those weathering products. Weathering grade classification on the granite stone monument was conducted by using absorption depths of weathering products This research is supported from National Research Institute of Cultural Heritage and we appreciate for this.

Hyun, C.; Roh, T.; Choi, M.; Park, H.

2009-05-01

183

External Resource: Weathering and Erosion  

NSDL National Science Digital Library

This activity includes background information about weathering, as well as simple demonstrations/activities to model how weather conditions contribute to weathering and erosion. Topics include: chemical weathering, dunes, erosion, floods, glaciers, physi

1900-01-01

184

Weather affects us  

NSDL National Science Digital Library

2nd grade weather unit. The students will learn how weather affects us in our daily lives Read and view the video on meteorologists Kid Meteorologist Learn about clouds - watch S'cool Clouds All About Clouds Do scholastic: weather watch and game Weather Read winter storms Interactive Weather Web Pages Read a reason for the season A Reason for the Season Read about precipitation Precipitation Read and view video on flooding Flood: Farming and Erosion Read about air pressure It's a Breeze: How Air Pressure Affects You Read about Hurricanes Hurricanes Do the activities and read ...

Kimmy

2009-11-09

185

Proactive vehicle re-routing strategies for congestion avoidance  

E-print Network

showing the current traffic conditions to drivers because they can guide them as function of other factors such as historic traffic and current weather. However, these solutions do not try to avoid congestions explicitly to unstable global traffic behavior: when it happens, congestion is switched from one route to another

Borcea, Cristian

186

Reactive Collision Avoidance Algorithm  

NASA Technical Reports Server (NTRS)

The reactive collision avoidance (RCA) algorithm allows a spacecraft to find a fuel-optimal trajectory for avoiding an arbitrary number of colliding spacecraft in real time while accounting for acceleration limits. In addition to spacecraft, the technology can be used for vehicles that can accelerate in any direction, such as helicopters and submersibles. In contrast to existing, passive algorithms that simultaneously design trajectories for a cluster of vehicles working to achieve a common goal, RCA is implemented onboard spacecraft only when an imminent collision is detected, and then plans a collision avoidance maneuver for only that host vehicle, thus preventing a collision in an off-nominal situation for which passive algorithms cannot. An example scenario for such a situation might be when a spacecraft in the cluster is approaching another one, but enters safe mode and begins to drift. Functionally, the RCA detects colliding spacecraft, plans an evasion trajectory by solving the Evasion Trajectory Problem (ETP), and then recovers after the collision is avoided. A direct optimization approach was used to develop the algorithm so it can run in real time. In this innovation, a parameterized class of avoidance trajectories is specified, and then the optimal trajectory is found by searching over the parameters. The class of trajectories is selected as bang-off-bang as motivated by optimal control theory. That is, an avoiding spacecraft first applies full acceleration in a constant direction, then coasts, and finally applies full acceleration to stop. The parameter optimization problem can be solved offline and stored as a look-up table of values. Using a look-up table allows the algorithm to run in real time. Given a colliding spacecraft, the properties of the collision geometry serve as indices of the look-up table that gives the optimal trajectory. For multiple colliding spacecraft, the set of trajectories that avoid all spacecraft is rapidly searched on-line. The optimal avoidance trajectory is implemented as a receding-horizon model predictive control law. Therefore, at each time step, the optimal avoidance trajectory is found and the first time step of its acceleration is applied. At the next time step of the control computer, the problem is re-solved and the new first time step is again applied. This continual updating allows the RCA algorithm to adapt to a colliding spacecraft that is making erratic course changes.

Scharf, Daniel; Acikmese, Behcet; Ploen, Scott; Hadaegh, Fred

2010-01-01

187

Beyond the Weather Chart: Weathering New Experiences.  

ERIC Educational Resources Information Center

Describes an early childhood educator's approach to teaching children about rain, rainbows, clouds, precipitation, the sun, air, and wind. Recommends ways to organize study topics and describes experiments that can help children better understand the different elements of weather. (MOK)

Huffman, Amy Bruno

1996-01-01

188

Severe Weather 101: Winter Weather Basics  

MedlinePLUS

... Educators For Students For Everyone Severe Weather 101 Thunderstorms Basics Types Detection Forecasting FAQ Tornadoes Basics Types ... moisture. What we do: NSSL researchers studied winter thunderstorms and found that there is some evidence that ...

189

National Weather Service- Severe Weather Awareness  

NSDL National Science Digital Library

This website provides access to information designed to protect and prepare individuals from severe weather. Materials presented here include forecasts for aviation and marine interests and the general public, maps, statistical data, educational materials, publications, and links to related sites.

190

Reducing Aviation Weather-Related Accidents Through High-Fidelity Weather Information Distribution and Presentation  

NASA Technical Reports Server (NTRS)

In February 1997, the US President announced a national goal to reduce the fatal accident rate for aviation by 80% within ten years. The National Aeronautics and Space Administration established the Aviation Safety Program to develop technologies needed to meet this aggressive goal. Because weather has been identified (is a causal factor in approximately 30% of all aviation accidents, a project was established for the development of technologies that will provide accurate, time and intuitive information to pilots, dispatchers, and air traffic controllers to enable the detection and avoidance of atmospheric hazards. This project addresses the weather information needs of general, corporate, regional, and transport aircraft operators. An overview and status of research and development efforts for high-fidelity weather information distribution and presentation is discussed with emphasis on weather information in the cockpit.

Stough, H. Paul, III; Shafer, Daniel B.; Schaffner, Philip R.; Martzaklis, Konstantinos S.

2000-01-01

191

A testbed to emulate next-generation directional RF and free-space optical tactical networks  

Microsoft Academic Search

The tactical edge network emulation tool (TENET) hardware integration system (THIS) is designed to characterize higher layer responses to the dynamic physical layer topology of a tactical network utilizing directional communication links. THIS emulates the mobile, tactical, network environment using the hardware in a static infrastructure. MATLAB-based tools implement the TENET emulation to simulate mobility induced link fragility, and the

William M. Turner; Daniel J. Tebben; Jason R. Madsen; Anurag Dwivedi

2009-01-01

192

A Tactical Information Management Middleware for Resource-constrained Mobile P2P Networks*  

E-print Network

1 A Tactical Information Management Middleware for Resource-constrained Mobile P2P Networks* Bo Xu1 University of Science and Technology, USA Abstract-- In this paper we provide an architecture for Tactical-based data dissemination, and the use of a tactical information management query language. These ideas

Wolfson, Ouri E.

193

Scalability Analysis of Tactical Mobility Patterns Ertugrul Necdet Ciftcioglu Ram Ramanathan Thomas F. La Porta  

E-print Network

Scalability Analysis of Tactical Mobility Patterns Ertugrul Necdet Ciftcioglu Ram Ramanathan Thomas of mobility. In this work, we consider the scalability of real-world mobile tactical networks, including and scalability of a network con- sisting of two convoy groups moving according to the repeated traversal tactical

Ramanathan, Ram

194

Research on Tennis Technique and Tactics Decision Support Based on Theory of Association Data Mining  

Microsoft Academic Search

The result of tennis match were great influenced by the level of technique and tactics decision-making, and how to find the characteristics of athletes' technique and tactics from mass data is a urgent problem which is needed to be shoveled, in order to make up the insufficiency of traditional statistical method and provide scientific basis for tennis technique and tactics

Liang Chengjun; Yu Lijuan; Wang Jihong

2010-01-01

195

In Country with Tactical Iraqi: Trust, Identity, and Language Learning in a Military Video Game  

Microsoft Academic Search

This paper discusses Tactical Iraqi, a video game developed at the University of Southern California with funding from the U.S. military that is designed to accelerate a learner's acquisition of spoken Arabic to assist in the rapid deployment of soldiers into volatile tactical situations. This paper analyzes three distinct aspects of the Tactical Iraqi mission game: how \\

Elizabeth Losh

196

Density-dependent mating tactic expression is linked to stress hormone in Woodhouse's toad  

Microsoft Academic Search

The social environment can alter mating tactic expression through modulatory effects on the endocrine system. In anuran amphibians (frogs and toads), males often adopt noncalling mating tactics in response to increased chorus density, but the underlying physiological factors mediating this response are poorly understood. Recent models suggest that density-dependent expression of alternative mating tactics in anurans is associated with a

Christopher J. Leary; Apryl M. Garcia; Rosemary Knapp

2008-01-01

197

The Influence Tactic Preferred by Teaching Faculty: An Exploratory Case Study  

ERIC Educational Resources Information Center

This quantitative study was developed to determine the influence tactic used most often by teachers in a small college classroom. It was hypothesized that the rational persuasion tactic, which is defined as "using logical arguments and factual evidence to persuade the target". (Fu & Yukl, 2000, p. 252) would be the most commonly employed tactic by…

Rogers-Backus, Bonnie L.

2010-01-01

198

Aviation Weather Information Communications Study (AWIN). Phase 1 and 2  

NASA Technical Reports Server (NTRS)

This two part study examines the communication requirements to provide weather information in the cockpit as well as public and private communication systems available to address the requirements. Ongoing research projects combined with user needs for weather related information are used to identify and describe potential weather products that address decision support in three time frames: Far-Term Strategic, Near-Term Strategic and Tactical. Data requirements of these future products are identified and quantified. Communications systems and technologies available in the public as well as private sector are analyzed to identify potential solutions. Recommendations for further research identify cost, performance, and safety benefits to justify the investment. The study concludes that not all weather information has the same level of urgency to safety-of-flight and some information is more critical to one category of flight than another. Specific weather products need to be matched with communication systems with appropriate levels of reliability to support the criticality of the information. Available bandwidth for highly critical information should be preserved and dedicated to safety. Meanwhile, systems designed for in-flight-entertainment and other passenger/crew services could be used to support less critical information that is used only for planning and economic decision support.

Ball, J. W.; Herron, R. G.; Nozawa, E. T.; Thomas, E. A.; Witchey, R. D.

2000-01-01

199

Space Weathering of Rocks  

NASA Technical Reports Server (NTRS)

Space weathering discussions have generally centered around soils but exposed rocks will also incur the effects of weathering. On the Moon, rocks make up only a very small percentage of the exposed surface and areas where rocks are exposed, like central peaks, are often among the least space weathered regions we find in remote sensing data. However, our studies of weathered Ap 17 rocks 76015 and 76237 show that significant amounts of weathering products can build up on rock surfaces. Because rocks have much longer surface lifetimes than an individual soil grain, and thus record a longer history of exposure, we can study these products to gain a deeper perspective on the weathering process and better assess the relative impo!1ance of various weathering components on the Moon. In contrast to the lunar case, on small asteroids, like Itokowa, rocks make up a large fraction of the exposed surface. Results from the Hayabusa spacecraft at Itokowa suggest that while the low gravity does not allow for the development of a mature regolith, weathering patinas can and do develop on rock surfaces, in fact, the rocky surfaces were seen to be darker and appear spectrally more weathered than regions with finer materials. To explore how weathering of asteroidal rocks may differ from lunar, a set of ordinary chondrite meteorites (H, L, and LL) which have been subjected to artificial space weathering by nanopulse laser were examined by TEM. NpFe(sup 0) bearing glasses were ubiquitous in both the naturally-weathered lunar and the artificially-weathered meteorite samples.

Noble, Sarah

2011-01-01

200

Avoiding the Flu  

MedlinePLUS

... of this page please turn Javascript on. Feature: Flu Avoiding the Flu Past Issues / Fall 2009 Table of Contents Children ... should still get the 2009 H1N1 vaccine. H1N1 Flu: Who Should Be Vaccinated First The Centers for ...

201

Prioritizing tactical quality improvement : An action research study  

Microsoft Academic Search

Purpose – The purpose of this paper is to test a method for improving decision-making at a tactical level – i.e. at the shop floor level. This is done by testing the use of the binary sorting algorithm (BSA) to improve decisions concerning quality improvement efforts among machine operators in a plastics manufacturer. Design\\/methodology\\/approach – The method used was the

Douglas N. Hales; Samia M. Siha; V. Sridharan; Judith I. McKnew

2006-01-01

202

Choosing How to Compete: Strategies and Tactics in Standardization  

Microsoft Academic Search

In a network industry, each firm must decide whether or not it wants its product to be compatible with those of rivals. This horizontal compatibility strategy determines whether competition is a battle to establish a standard or the more conventional competition within a standard. The two forms of competition involve different tactics and may differ in the extent to which

Stanley M. Besen; Joseph Farrell

1994-01-01

203

Adaptive forwarding rate control for network coding in tactical manets  

Microsoft Academic Search

In this paper, we propose a novel packet forwarding scheme based on network coding that is resilient to jamming attack in a tactical area. Wireless communication is necessary in a battlefield, but it is fragile to jamming attacks from an adversary because of the wireless shared medium. Jamming attack is easily achieved by emitting continuous radio signals and it can

Y. O. Soon; Eun-Kyu Lee; Mario Gerla

2010-01-01

204

Teaching Tactics and Dialog in AutoTutor  

Microsoft Academic Search

The Tutoring Research Group at the University of Memphis has developed a computer tutor (called AutoTutor) that simulates the discourse patterns and pedagogical strategies of a typical human tutor. The dialog tactics were based on a previous project that dissected 100 hours of naturalistic tutoring sessions. AutoTutor is currently targeted for college students in introductory computer literacy courses, who learn

Arthur C. Graesser; Derek Harter

2001-01-01

205

Limitations on tactical missile defenses: Negotiated and otherwise  

Microsoft Academic Search

Partial contents: How SDI motivates the ATBM and ABM Treaty issues; The desirability of ATBM restrictions; Existing limitations, and the intent of those constraints; Classes of candidate rules for ATBM restriction; The scope of TBM\\/ATBM restriction; The scope of TBM\\/ATBM limitation; and Passive constraints and feasibility determinants of ATBM. Keywords: Antimissile defense systems; Tactical weapons; Arms control treaties; Conventional warfare;

1988-01-01

206

Tactic-specific differences in seminal fluid influence sperm performance  

PubMed Central

Seminal fluid often makes up a large part of an ejaculate, yet most empirical and theoretical studies on sperm competition have focused on how sperm characteristics (number and quality) affect fertilization success. However, seminal fluid influences own sperm performance and may potentially influence the outcome of sperm competition, by also affecting that of rivals. As a consequence males may be expected to allocate their investment in both sperm and seminal fluid in relation to the potential level of competition. Grass goby (Zosterisessor ophiocephalus) is an external fertilizer with guard-sneaker mating tactics, where sperm competition risk varies according to the tactic adopted. Here, we experimentally manipulated grass goby ejaculates by separately combining sperm and seminal fluid from territorial and sneaker males. While sperm of sneaker and territorial males did not differ in their performance when they interacted with their own seminal fluid only, sperm of sneakers increased their velocity and fertilization rate in the presence of territorial males' seminal fluid. By contrast, sneaker males' seminal fluid had a detrimental effect on the performance of territorial males' sperm. Sperm velocity was unaffected by the seminal fluid of males employing the same tactic, suggesting that seminal fluid's effect on rival-tactic sperm is not based on a self/non-self recognition mechanism. Our findings show that cross interactions of sperm and seminal fluid may influence the fertilization success of competing ejaculates with males investing in both sperm and seminal fluid in response to sperm competition risk. PMID:23363633

Locatello, Lisa; Poli, Federica; Rasotto, Maria B.

2013-01-01

207

Identification of non-specific tactical tasks in invasion games  

Microsoft Academic Search

Background and significance: The notion of transferability (i.e. sampling) has been put forward as one of four core pedagogical principles for games teaching. The sampling principle was based on the premise that it may be possible to show the existence of tactical similarities between apparently dissimilar games, leading to a much better overall understanding of games. However, research has yet

Daniel Memmert; Stephen Harvey

2010-01-01

208

Tactical combat casualty care 2007: evolving concepts and battlefield experience.  

PubMed

The Tactical Combat Casualty Care (TCCC) project begun by the Naval Special Warfare Command and continued by the U.S. Special Operations Command developed a set of tactically appropriate battlefield trauma care guidelines that were initially published in 1996. Transition of these guidelines into use throughout the Department of Defense has been ongoing since that time. The need for updates to the TCCC guidelines was recognized early on and has been carried out by the Committee on Tactical Combat Casualty Care established and operated by the Naval Operational Medicine Institute. The evolution of these guidelines from the 1996 recommendations to the present is described. Numerous reports in the medical literature and collected from combat first responders have documented that TCCC is saving lives on the battlefield and improving the tactical flow of missions on which casualties have occurred. Present challenges to the optimized implementation of TCCC in U.S. combat units include the need to expedite transition of new TCCC techniques and technologies to deploying units, to provide TCCC training for all U.S. combatants, and to ensure adequate funding for the Committee on TCCC. PMID:18154234

Butler, Frank K; Holcomb, John B; Giebner, Stephen D; McSwain, Norman E; Bagian, James

2007-11-01

209

Littoral environmental reconnaissance using tactical imagery from unmanned aircraft systems  

Microsoft Academic Search

The dynamic nature of littoral regions requires a reconnaissance approach that can rapidly quantify environmental conditions. Inadequate estimation of these conditions can have substantial impacts on the performance of Naval systems. Given that expeditionary warfare operations can occur over timescales on the order of hours, exploitation of video imagery from tactical vehicles such as Unmanned Aircraft Systems (UAS) has proved

K. Todd Holland; David M. Lalejini; Steven D. Spansel; Robert A. Holman

2010-01-01

210

Fostering Hooks and Shifts: Tutorial Tactics for Guided Mathematical Discovery  

E-print Network

Fostering Hooks and Shifts: Tutorial Tactics for Guided Mathematical Discovery Dor Abrahamson for enhancing, explaining, or evaluating their interaction strategy. Yet when they engage or ``hook-stepped discovery process as ``hooks and shifts'' (Abrahamson et al. 2011). The study reported in the current paper

Wilensky, Uri

211

Coastal Area Tactical-mapping System (CATS) Ramesh L. Shrestha  

E-print Network

Coastal Area Tactical-mapping System (CATS) Ramesh L. Shrestha University of Florida Department-TERM GOALS The long-term goals of the CATS project are: (1) to improve detection and identification of anti foliage. OBJECTIVES The overarching objective of the CATS project is to design, build, and demonstrate

Slatton, Clint

212

Coastal Area Tactical-mapping System (CATS) Ramesh L. Shrestha  

E-print Network

Coastal Area Tactical-mapping System (CATS) Ramesh L. Shrestha University of Florida Department-TERM GOALS The long-term goals of the CATS project are (1) to improve detection and identification of anti The overarching objective of the CATS project is to design, build, and demonstrate a low-power scanning airborne

Slatton, Clint

213

Strategies and Tactics for Community Mobilization. 1981 Latin America Seminars.  

ERIC Educational Resources Information Center

Three seminars examined strategies and tactics for community mobilization in Latin America. The sessions--which were held in Bogota, Columbia; Quito, Ecuador; and Recife, Brazil--involved a total of 75 participants from 27 organizations. Addressed during the seminars were development, leadership, mobilization, and learning in the context of…

Dobson, John R. A.

214

Tactical apologia: The American nursing association and assisted suicide  

Microsoft Academic Search

Studies of apologia have typically focused on powerful individuals and institutions responding to charges from equally powerful opponents, the struggles between elites and counter?elites. This essay argues that apologia may also be a tactic of resistance as subordinate groups answer the charges of superordinate groups. An examination of the American Nursing Association's response to research indicating many nurses had participated

Kendall R. Phillips

1999-01-01

215

Coq Tacticals and PVS Strategies: A Small Step Semantics  

NASA Technical Reports Server (NTRS)

The need for a small step semantics and more generally for a thorough documentation and understanding of Coq's tacticals and PVS's strategies arise with their growing use and the progressive uncovering of their subtleties. The purpose of the following study is to provide a simple and clear formal framework to describe their detailed semantics, and highlight their differences and similarities.

Kirchner, Florent

2003-01-01

216

Effectiveness of Relationship Marketing Tactics in a University Setting  

ERIC Educational Resources Information Center

We test the correlation between student perception of three university relationship-building tactics--commercial friendships, preferential treatment, and tangible rewards--with university student satisfaction. We also test whether two student characteristics--enduring involvement with education and sense of entitlement--have a moderating effect on…

Trocchia, Philip J.; Finney, R. Zachary; Finney, Treena Gillespie

2013-01-01

217

Design and evaluation of a tactical decision aid  

Microsoft Academic Search

Design considerations and a part-task evaluation methodology for a submarine weapon-employment aid are discussed. The domain of SALVO is submarine torpedo attack, specifically engagements in which multiple torpedoes are fired against multiple targets. The aid provides assessment and planning features. These features are included as modules in a software toolbox, which the decision maker can call upon as the tactical

C. D. Urban

1990-01-01

218

Tactical coalition voting and information in the laboratory  

Microsoft Academic Search

Tactical coalition voting (TCV) is a balancing strategy where voters choose to vote for their second preferred party in order to influence the policy direction of the government coalition formed. In this paper, we experimentally evaluate the extent voters in a PR system engage in TCV. We find significant evidence that voters in the laboratory, even those not experienced with

Brian McCuen; Rebecca B. Morton

2010-01-01

219

Employee attitudes toward questionable negotiation tactics: empirical evidence from Peru  

Microsoft Academic Search

This research investigates the influence of three theoretically valid independent variables – horizontal and vertical individualism–collectivism, ethical idealism and trust propensity – on employees' attitudes toward ethically questionable negotiation tactics in Peru. A total of 233 usable responses were collected from participants employed in various industries in the capital area, Lima. The results empirically corroborated a classification of three groups

Abraham Stefanidis; Moshe Banai; Ulf Henning Richter

2012-01-01

220

Tactical Intelligence Tools for Distributed Agile Control of Air Operations  

E-print Network

Tactical Intelligence Tools for Distributed Agile Control of Air Operations Shashi Phoha Applied.edu Abstract This paper presents an innovative architecture for engineering an agile distributed system's definition of agility [5], we define agile control as the collective ability of agents to continually adapt

Gautam, Natarajan

221

Summary of the psychological effects of tactical nuclear warfare  

Microsoft Academic Search

The psychological component of the response of combat troops to tactical nuclear warfare is a troublesome variable which plagues military planners and commanders responsible for the preparation of the armed forces for the eventuality that nuclear weapons might one day be used in armed conflict. The devastating physical effects of nuclear weapons have been extensively documented and the biological response

Sessions

1984-01-01

222

Image transmission in tactical radio frequency shared network propagation environments  

NASA Astrophysics Data System (ADS)

The need to transmit images across tactical radio frequency (rf) links has been identified in army digitization applications. For example, military doctrine requires that tactical functions like identification of battlefield entities as potential targets and battle damage assessment be performed by the soldier. Currently, a key input to these processes is imagery. Therefore, the quality and timeliness of the image directly impact tactical performance. The military is investigating the employment of remote sensors and advanced communications systems to meet this requirement as part of its digitization effort. Army communications systems exist that partially meet this requirement. However, many existing solutions employ these legacy systems in the context of a point-to-point communications architecture. Solutions to the problem of transmitting images across a rf network have not been fully explored. The term network implies that the rf transmission media is common to and shared by multiple subscribers. It is a suite of capabilities that collectively manage media access and information transfer for its subscribers thus providing substantial improvements in effectiveness, efficiency, and robustness. This paper discusses the challenges of transmitting images using one army legacy communications system in a tactical rf network, presents a conceptual framework for attacking the problem, and discusses one solution.

White, Kent H.; Wagner, Kerry A.; O'Hanian, Scott

1997-06-01

223

Borderline personality disorder features and mate retention tactics.  

PubMed

The purpose of the present study was to examine the association between features of borderline personality disorder (BPD) and mate retention tactics as a means of examining an evolutionary perspective on the association between BPD features and interpersonal problems and violence in romantic relationships. Two-hundred twenty-five college student participants completed the Personality Assessment Inventory for Borderlines (PAI-BOR; Morey, 1991) and the Mate Retention Inventory-Short Form (MRI-SF; Buss, Shackelford, & McKibbin, 2008) embedded within other measures. There was a strong association between BPD features and cost-inflicting mate retention tactics, including the specific tactics of vigilance, punishing mate's infidelity threat, intrasexual threats, and sexual inducements for both men and women. There were also gender-specific associations for additional tactics. These results contribute to our understanding of problems in romantic relationships among men and women with BPD features, including violence, and to our understanding of impulsive sexual behavior among individuals with BPD features by showing how these behaviors are used as extreme, maladaptive attempts at mate retention. PMID:22686222

Tragesser, Sarah L; Benfield, Jacob

2012-06-01

224

Innovative Tactic in Submandibular Salivary Gland Partial Resection  

PubMed Central

Summary: Adequate neck contour is one of the goals in facial rejuvenation. In some patients, treating the submandibular salivary gland (SMSG) ensures a satisfying result. Hematoma, sialoma, and paralysis of the depressors of the lower lip may occur when the deep neck is approached. The objective of this work is to present a new tactic to prevent the aforementioned complications. Two hundred forty consecutive neck lift patients with partial resection of the SMSG were studied. The tactic consisted of placing sutures to facilitate the retraction of the platysma muscle and the accompanying marginal mandibular and cervical branches of the facial nerve during the resection of the SMSG. It also included stitches that bring the platysma muscle in contact with the remaining SMSG, sealing the dissected area. The first 25 (control) subjects did not undergo the tactic; the remaining 215 (study group) did. The occurrence of paralysis of the depressors of the lower lip and of hematoma and sialoma originating from the SMSG resection was observed. When comparing the control group with the study group, the rates of hematoma (8% vs 0%) and sialoma (24% vs 0%) were significantly higher in the former. Paralysis of the depressors of the lower lip also had a higher rate in the control group (4% vs 0.9%) although this difference was not statistically significant. The surgical tactic described is efficient in preventing the occurrence of hematoma, sialoma, and paralysis of the depressors of the lower lip in neck lift with partial resection of the SMSG. PMID:25587508

Auersvald, André

2014-01-01

225

A novel impulse radio network for tactical military wireless communications  

Microsoft Academic Search

Two of the major concerns in tactical military wireless communication networks are covertness and throughput. Impulse radio is an ultra-wideband code division multiple access (UWB-CDMA) technique being considered as the physical layer for future networks. Impulse radio exhibits low power spectral density and relatively high immunity to fading but suffers from relatively long acquisition times. In traditional packet radio networks

Santosh S. Kolenchery; J. K. Townsend; J. A. Freebersyser

1998-01-01

226

Behavioral tactics of subadult female floaters in the tree swallow  

Microsoft Academic Search

There are large numbers of reproductively mature female tree swallows (Tachycineta bicolor) which do not breed due to limits of suitable nesting cavities. Many of these floaters are one-year-old females that have a distinctive subadult plumage. This study examines the behavioral tactics that these subadult female floaters use to obtain breeding opportunities. Early in the season, subadult floaters tended to

Bridget J. Stutchbury; Raleigh J. Robertson

1987-01-01

227

Cooperative organic mine avoidance path planning  

NASA Astrophysics Data System (ADS)

The JHU/APL Path Planning team has developed path planning techniques to look for paths that balance the utility and risk associated with different routes through a minefield. Extending on previous years' efforts, we investigated real-world Naval mine avoidance requirements and developed a tactical decision aid (TDA) that satisfies those requirements. APL has developed new mine path planning techniques using graph based and genetic algorithms which quickly produce near-minimum risk paths for complicated fitness functions incorporating risk, path length, ship kinematics, and naval doctrine. The TDA user interface, a Java Swing application that obtains data via Corba interfaces to path planning databases, allows the operator to explore a fusion of historic and in situ mine field data, control the path planner, and display the planning results. To provide a context for the minefield data, the user interface also renders data from the Digital Nautical Chart database, a database created by the National Geospatial-Intelligence Agency containing charts of the world's ports and coastal regions. This TDA has been developed in conjunction with the COMID (Cooperative Organic Mine Defense) system. This paper presents a description of the algorithms, architecture, and application produced.

McCubbin, Christopher B.; Piatko, Christine D.; Peterson, Adam V.; Donnald, Creighton R.; Cohen, David

2005-06-01

228

NOAA Daily Weather Maps  

NSDL National Science Digital Library

The charts on this website are the principal charts of the former Weather Bureau publication, "Daily Weather Map." They are the Surface Weather Map, the 500-Millibar Height Contours chart, the Highest and Lowest Temperatures chart, and the Precipitation Areas and Amounts chart. For each day, simple charts are arranged on a single page. These charts are the surface analysis of pressure and fronts, color shading, in ten degree intervals,of maximum and minimum temperature, 500-Millibar height contours, and color shaded 24-hour total precipitation. These charts act as links to their respective Daily Weather Map charts. All charts are derived from the operational weather maps prepared at the National Centers for Environmental Prediction, Hydrometeorological Prediction Center, National Weather Service.

Hydrometeorological Prediction Center

2011-01-01

229

Backyard Weather Stations  

NSDL National Science Digital Library

Learn how to build your own backyard weather station with complete directions provided by FamilyEducation.com's Web site, Backyard Weather Stations. The site shows exactly what you'll need and how to build the necessary components (e.g., rain gauge and barometer), as well as how to keep records of the data collected. Parents and teachers will enjoy watching the kids "learn the basics of scientific observation and record-keeping while satisfying their natural curiosity about weather."

Randall, Dennis.

230

Winter weather activity  

NSDL National Science Digital Library

This project explores factors that help create severe winter weather. An interactive simulation provides hands-on experience, followed by guiding questions and resource exploration. Weather Maker Simulator Use the weather simulation above to answer the following questions in complete sentences on paper. 1. In general, when are winds formed? 2. When winds are blowing, how can you get them to stop? 3. What usually happens when there is a large difference between the temperatures? 4. What happens when there is high ...

Frankovic, Whitney

2009-09-28

231

RBSP Space Weather data  

NASA Astrophysics Data System (ADS)

On August 23, 2012, NASA will launch two identical probes into the radiation belts to provide unprecedented insight into the physical processes and dynamics of near-Earth space. The RBSP mission in addition to the scientific data return, provides a 1Kbps real-time space weather broadcast data in support of real time space weather modeling, forecast and prediction efforts. Networks of ground stations have been identified to downlink the space weather data. The RBSP instrument suites have selected space weather data to be broadcast from their collected space data on board the spacecraft, a subset from measurements based on information normally available to the instrument. The data subset includes particle fluxes at a variety of energies, and magnetic and electric field data. This selected space weather data is broadcast at all times through the primary spacecraft science downlink antennas when an observatory is not in a primary mission-related ground contact. The collected data will resolve important scientific issues and help researchers develop and improve various models for the radiation belts that can be used by forecasters to predict space weather phenomena and alert astronauts and spacecraft operators to potential hazards. The near real-time data from RBSP will be available to monitor and analyze current environmental conditions, forecast natural environmental changes and support anomaly resolution. The space weather data will be available on the RBSP Science Gateway at http://athena.jhuapl.edu/ and will provide access to the space weather data received from the RBSP real-time space weather broadcast. The near real-time data will be calibrated and displayed on the web as soon as possible. The CCMC will ingest the RBSP space weather data into real-time models. The raw space weather data will be permanently archived at APL. This presentation will provide a first look at RBSP space weather data products.

Weiss, M.; Fox, N. J.; Mauk, B. H.; Barnes, R. J.; Potter, M.; Romeo, G.; Smith, D.

2012-12-01

232

Weather Radar Fundamentals  

NSDL National Science Digital Library

This 2-hour module presents the fundamental principles of Doppler weather radar operation and how to interpret common weather phenomena using radar imagery. This is accomplished via conceptual animations and many interactive radar examples in which the user can practice interpreting both radar reflectivity and radar velocity imagery. Although intended as an accelerated introduction to understanding and using basic Doppler weather radar products, the module can also serve as an excellent refresher for more experienced users.

COMET

2012-03-21

233

Everything Weather- Archived Data  

NSDL National Science Digital Library

Users can obtain current weather forecasts for their own areas by entering a ZIP code, or they can access a large archive of historic data on severe weather (tornadoes, hail, high winds, hurricanes). Materials presented in the archive include dates, times, and intensities of storms, a photo gallery, maps, radar and other satellite data, storm chaser reports, and links to other weather sites. Raw data can be found in several forms for teachers wishing to have unprocessed data to work with.

2001-01-01

234

National Weather Service  

NSDL National Science Digital Library

Sick and tired of the heat? Feel like it will never end? Then check out the National Weather Service's (NWS) Heat Wave, a site devoted to the extreme weather that is crippling the south. The NWS provides information on the heat index, heat's affect on the body, and how to beat the heat. For those who want an up-to-the-minute look at the weather, the site links to current conditions, forecasts, and watches and warnings.

235

Tactical Electronic Support Measures (ESM)/Imaging Sensor Synergism  

NASA Astrophysics Data System (ADS)

A nation cannot fight successfully without detailed and accurate knowledge of its potential enemies. When an Air Force crew is directed on an attack mission, it is neither prudent nor cost effective to simply fly to an area, select a target by observation and expend ordinance. The ESM/Imaging sensor combination will significantly contribute to the ability to be decisive in the event of conflict. The synergism of Tactical ESM data provided from a stand-off location and the high resolution image data provided from a stand-off location or overflight results in a sustained reconnaissance capability that can be used through all phases of military operation from peace time surveillance through actual combat operations. From stand-off ranges in excess of 200 nautical miles, the tactical ESM sensor will provide cues concerning the disposition, composition, and movement of adversaries through the interception of electromagnetic emissions. The cues can be used by the reconnaissance aircrew: (1) to swiftly focus a stand-off imaging sensor on the area of interest from ranges in excess of 50 nautical miles or (2) provide general target location and optimum ingress/egress route information for target overflight imaging. Therefore, the timely cuing and identification data provided by the Tactical ESM sensor will be combined with verification, positive ID, blind bombing accuracy data obtained from imaging sensors. Thus optimum results will be obtained by using cuing and verification sensors to provide timely, positive identification and accurate target locations. The synergism of Tactical ESM and imaging sensors will be particularly effective in the critical 20 - 300 kilometer region from a political border or forward edge of a battle area (FEBA). Limited ESM imaging sensor synergism' has already been operationally employed using the Tactical Electronic Reconnaissance Sensor (TEREC) for cuing and the UPD-4 Side Looking Radar (SLR) for verification. Although this synergism was performed manually, the basic utility of the concept was verified.

Post, Paul W.; Chambers, Richard E.

1985-12-01

236

Cockpit weather information needs  

NASA Technical Reports Server (NTRS)

The primary objective is to develop an advanced pilot weather interface for the flight deck and to measure its utilization and effectiveness in pilot reroute decision processes, weather situation awareness, and weather monitoring. Identical graphical weather displays for the dispatcher, air traffic control (ATC), and pilot crew should also enhance the dialogue capabilities for reroute decisions. By utilizing a broadcast data link for surface observations, forecasts, radar summaries, lightning strikes, and weather alerts, onboard weather computing facilities construct graphical displays, historical weather displays, color textual displays, and other tools to assist the pilot crew. Since the weather data is continually being received and stored by the airborne system, the pilot crew has instantaneous access to the latest information. This information is color coded to distinguish degrees of category for surface observations, ceiling and visibilities, and ground radar summaries. Automatic weather monitoring and pilot crew alerting is accomplished by the airborne computing facilities. When a new weather information is received, the displays are instantaneously changed to reflect the new information. Also, when a new surface or special observation for the intended destination is received, the pilot crew is informed so that information can be studied at the pilot's discretion. The pilot crew is also immediately alerted when a severe weather notice, AIRMET or SIGMET, is received. The cockpit weather display shares a multicolor eight inch cathode ray tube and overlaid touch panel with a pilot crew data link interface. Touch sensitive buttons and areas are used for pilot selection of graphical and data link displays. Time critical ATC messages are presented in a small window that overlays other displays so that immediate pilot alerting and action can be taken. Predeparture and reroute clearances are displayed on the graphical weather system so pilot review of weather along the route can be accomplished prior to pilot acceptance of the clearance. An ongoing multiphase test series is planned for testing and modifying the graphical weather system. Preliminary data shows that the nine test subjects considered the graphical presentation to be much better than their current weather information source for situation awareness, flight safety, and reroute decision making.

Scanlon, Charles H.

1992-01-01

237

Winter Storm (weather)  

NSDL National Science Digital Library

This project explores factors that help create severe winter weather. An interactive simulation provides hands-on experience, followed by guiding questions and resource exploration. First think about these questions: 1. What is your favorite aspect of winter weather? 2. How does the weather effect your everyday life? Form groups of THREE. Explore the following simulation: Weather Maker Simulator Use the simulation to answer the following questions on paper... 1. In general, when are winds formed? 2. When winds are blowing, how can you ...

Miller, Aubree

2009-09-28

238

Pilot Weather Advisor System  

NASA Technical Reports Server (NTRS)

The Pilot Weather Advisor (PWA) system is an automated satellite radio-broadcasting system that provides nearly real-time weather data to pilots of aircraft in flight anywhere in the continental United States. The system was designed to enhance safety in two distinct ways: First, the automated receipt of information would relieve the pilot of the time-consuming and distracting task of obtaining weather information via voice communication with ground stations. Second, the presentation of the information would be centered around a map format, thereby making the spatial and temporal relationships in the surrounding weather situation much easier to understand

Lindamood, Glenn; Martzaklis, Konstantinos Gus; Hoffler, Keith; Hill, Damon; Mehrotra, Sudhir C.; White, E. Richard; Fisher, Bruce D.; Crabill, Norman L.; Tucholski, Allen D.

2006-01-01

239

Aircraft wake turbulence avoidance  

NASA Technical Reports Server (NTRS)

Analytical studies and flight tests are used to describe the formation and severity of trailing vortices and the spatial extent of their influence. This information is then used to outline procedures for ready application by pilots, tower operators, and others concerned with the flow of traffic. The procedures provide the necessary appreciation of the physical attributes of trailing vortices, the potential hazards involved when encountering them, and how best to avoid the dangerous portions of the wake during flight operations.

Mcgowan, W. A.

1971-01-01

240

Astonishing Judo, first contact tactics: A Biomechanical evaluation of tactics at start of high level competitions  

E-print Network

This paper is focalized on the limit application of judo throws, by tactics at first contact time, with some astonishing information at a first seeing, but biomechanically grounded, not often applied or because against the sound common sense or out the old oral judo tradition. To do so we provide an appraisal of the grips concept and his consequences in the Olympic sport judo from a biomechanics perspective, we will try to deeper both the concept and the function of grips and define the potential application of some throws without grips. Broadening this situation we try to underline some specific throwing situation in which grips are or not at all applied or applied in non conventional way. We describe at first the problem from the theoretical point of view. And as second point we try to find practical application, original or already developed in high level competitions. The provocative words Judo without grips or throw without grips are connected to the limit application of some biomechanical tricks, ground...

Sacripanti, Attilio

2014-01-01

241

Towards a tactical nuclear weapons treaty? Is There a Role of IAEA Tools of Safeguards?  

SciTech Connect

In recent years, there is growing interest in formal negotiations on non-strategic or tactical nuclear weapons. With the negotiations of New START, there has been much speculation that a tactical nuclear weapons treaty should be included in the follow on to New START. This paper examines the current policy environment related to tactical weapons and some of the issues surrounding the definition of tactical nuclear weapons. We then map out the steps that would need to be taken in order to begin discussions on a tactical nuclear weapons treaty. These steps will review the potential role of the IAEA in verification of a tactical nuclear weapons treaty. Specifically, does IAEA involvement in various arms control treaties serve as a useful roadmap on how to overcome some of the issues pertaining to a tactical nuclear weapons treaty?

Saunders, Emily C. [Los Alamos National Laboratory; Rowberry, Ariana N. [Los Alamos National Laboratory; Fearey, Bryan L. [Los Alamos National Laboratory

2012-07-12

242

Weather and emotional state  

NASA Astrophysics Data System (ADS)

Introduction Given the proven effects of weather on the human organism, an attempt to examine its effects on a psychic and emotional level has been made. Emotions affect the bio-tonus, working ability and concentration, hence their significance in various domains of economic life, such as health care, education, transportation, tourism, etc. Data and methods The research has been made in Sofia City within a period of 8 months, using 5 psychological methods (Eysenck Personality Questionnaire (EPQ), State-Trait Anxiety Inventory (STAI), Test for Self-assessment of the emotional state (developed by Wessman and Ricks), Test for evaluation of moods and Test "Self-confidence - Activity - Mood" (developed by the specialists from the Military Academy in Saint Petersburg). The Fiodorov-Chubukov's complex-climatic method was used to characterize meteorological conditions because of the purpose to include in the analysis a maximal number of meteorological elements. 16 weather types are defined in dependence of the meteorological elements values according to this method. Abrupt weather changes from one day to another, defined by the same method, were considered as well. Results and discussions The results obtained by t-test show that the different categories of weather lead to changes in the emotional status, which indicates a character either positive or negative for the organism. The abrupt weather changes, according to expectations, have negative effect on human emotions but only when a transition to the cloudy weather or weather type, classified as "unfavourable" has been realized. The relationship between weather and human emotions is rather complicated since it depends on individual characteristics of people. One of these individual psychological characteristics, marked by the dimension "neuroticism", has a strong effect on emotional reactions in different weather conditions. Emotionally stable individuals are more "protected" to the weather influence on their emotions, while those who are emotionally unstable have a stronger dependence to the impacts of the weather.

Spasova, Z.

2010-09-01

243

Convective Weather Forecast Accuracy Analysis at Center and Sector Levels  

NASA Technical Reports Server (NTRS)

This paper presents a detailed convective forecast accuracy analysis at center and sector levels. The study is aimed to provide more meaningful forecast verification measures to aviation community, as well as to obtain useful information leading to the improvements in the weather translation capacity models. In general, the vast majority of forecast verification efforts over past decades have been on the calculation of traditional standard verification measure scores over forecast and observation data analyses onto grids. These verification measures based on the binary classification have been applied in quality assurance of weather forecast products at the national level for many years. Our research focuses on the forecast at the center and sector levels. We calculate the standard forecast verification measure scores for en-route air traffic centers and sectors first, followed by conducting the forecast validation analysis and related verification measures for weather intensities and locations at centers and sectors levels. An approach to improve the prediction of sector weather coverage by multiple sector forecasts is then developed. The weather severe intensity assessment was carried out by using the correlations between forecast and actual weather observation airspace coverage. The weather forecast accuracy on horizontal location was assessed by examining the forecast errors. The improvement in prediction of weather coverage was determined by the correlation between actual sector weather coverage and prediction. observed and forecasted Convective Weather Avoidance Model (CWAM) data collected from June to September in 2007. CWAM zero-minute forecast data with aircraft avoidance probability of 60% and 80% are used as the actual weather observation. All forecast measurements are based on 30-minute, 60- minute, 90-minute, and 120-minute forecasts with the same avoidance probabilities. The forecast accuracy analysis for times under one-hour showed that the errors in intensity and location for center forecast are relatively low. For example, 1-hour forecast intensity and horizontal location errors for ZDC center were about 0.12 and 0.13. However, the correlation between sector 1-hour forecast and actual weather coverage was weak, for sector ZDC32, about 32% of the total variation of observation weather intensity was unexplained by forecast; the sector horizontal location error was about 0.10. The paper also introduces an approach to estimate the sector three-dimensional actual weather coverage by using multiple sector forecasts, which turned out to produce better predictions. Using Multiple Linear Regression (MLR) model for this approach, the correlations between actual observation and the multiple sector forecast model prediction improved by several percents at 95% confidence level in comparison with single sector forecast.

Wang, Yao; Sridhar, Banavar

2010-01-01

244

Negative maternal or paternal effects on tactic inheritance under a conditional strategy.  

PubMed

Alternative behavioral and life-history tactics are common in animal populations. The conditional strategy model provides a powerful explanation for the evolution and persistence of such tactics, as it allows alternative tactics to be perpetuated even if there is tactic inheritance and tactics yield unequal mean fitness. In many biological systems negative maternal or paternal effects complicate the inheritance of condition and, hence, the inheritance of alternative tactics. Indeed, the inheritance of condition may result in the alternation of tactics across generations. In this paper, we show that the conditional strategy is robust to these effects on progeny condition. There is a unique and stable proportion of tactics under standard inheritance and unequal tactic fitness, and these two important properties of the conditional strategy hold even if negative maternal or paternal effects on progeny condition cause tactics to alternate across generations. However, the dynamics of tactic proportions pursuant to a perturbation of the equilibrium tactic proportions depend on the form of tactic inheritance. An application of our theoretical results to data from a population of smallmouth bass (Micropterus dolomieu) in which negative paternal effects dictate progeny condition reveals that age at first reproduction in males alternates regularly across generations. Furthermore, the model indicates that the population would return rapidly to equilibrium if the proportions of males that mature early or late in life were perturbed from the equilibrium within the system. This example shows how the model of the conditional strategy can be used to gain insight into tactic dynamics in situations where some of the model parameters are difficult or impossible to measure empirically. PMID:15341155

Wiegmann, Daniel D; Angeloni, Lisa M; Baylis, Jeffrey R; Newman, Steven P

2004-07-01

245

What Is Space Weather?  

NSDL National Science Digital Library

This resource provides a brief overview of the phenomenon known as space weather, which happens when energetic particles emitted by the Sun impact the Earth's magnetosphere. Users can view images, video clips, and animations of auroras and other types of space weather. A set of links to related websites is also provided.

246

People and Weather.  

ERIC Educational Resources Information Center

Provides: (1) background information on ways weather influences human lives; (2) activities related to this topic; and (3) a ready-to-copy page with weather trivia. Each activity includes an objective, list of materials needed, recommended age level(s), subject area(s), and instructional strategies. (JN)

NatureScope, 1985

1985-01-01

247

Mild and Wild Weather.  

ERIC Educational Resources Information Center

Presents background information and six activities that focus on clouds, precipitation, and stormy weather. Each activity includes an objective, recommended age level(s), subject area(s), and instructional strategies. Also provided are two ready-to-copy pages (a coloring page on lightning and a list of weather riddles to solve). (JN)

NatureScope, 1985

1985-01-01

248

Sedimentary Rocks and Weathering  

NSDL National Science Digital Library

This site contains 42 questions on the topic of sedimentary rocks and weathering including clast sizes, depositional environments, and products of weathering. This is part of the Principles of Earth Science course at the University of South Dakota. Users select an answer and are provided immediate feedback.

Heaton, Timothy

249

Home Weatherization Visit  

ScienceCinema

Secretary Steven Chu visits a home that is in the process of being weatherized in Columbus, OH, along with Ohio Governor Ted Strickland and Columbus Mayor Michael Coleman. They discuss the benefits of weatherization and how funding from the recovery act is having a direct impact in communities across America.

Chu, Steven

2013-05-29

250

Designing a Weather Station  

ERIC Educational Resources Information Center

The collection and analysis of weather data is crucial to the location of alternate energy systems like solar and wind. This article presents a design challenge that gives students a chance to design a weather station to collect data in advance of a large wind turbine installation. Data analysis is a crucial part of any science or engineering…

Roman, Harry T.

2012-01-01

251

Weather Fundamentals: Wind. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series, for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes) describes the roles of the sun, temperature, and air pressure in creating the incredible power…

1998

252

Weather Fundamentals: Clouds. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series, for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes) discusses how clouds form, the different types of clouds, and the important role they play in…

1998

253

Uncertain weather, uncertain climate  

E-print Network

of the Speckled Band" "Good-morning, madam," said Holmes cheerily. "My name is Sherlock Holmes. #12;222b Baker sit on the left-hand side of the driver." #12;Holmes' calculation D. Nychka Uncertain weather Maximize over vehicle #12;D. Nychka Uncertain weather, uncertain climate 8 Holmes' conclusion ­ the highest

Nychka, Douglas

254

Weathering and weathering rates of natural stone  

NASA Astrophysics Data System (ADS)

Physical and chemical weathering were studied as separate processes in the past. Recent research, however, shows that most processes are physicochemical in nature. The rates at which calcite and silica weather by dissolution are dependent on the regional and local climatic environment. The weathering of silicate rocks leaves discolored margins and rinds, a function of the rocks' permeability and of the climatic parameters. Salt action, the greatest disruptive factor, is complex and not yet fully understood in all its phases, but some of the causes of disruption are crystallization pressure, hydration pressure, and hygroscopic attraction of excess moisture. The decay of marble is complex, an interaction between disolution, crack-corrosion, and expansion-contraction cycies triggered by the release of residual stresses. Thin spalls of granites commonly found near the street level of buildings are generally caused by a combination of stress relief and salt action. To study and determine weathering rates of a variety of commercial stones, the National Bureau of Standards erected a Stone Exposure Test Wall in 1948. Of the many types of stone represented, only a few fossiliferous limestones permit a valid measurement of surface reduction in a polluted urban environment.

Winkler, Erhard M.

1987-06-01

255

Predicting the Weather  

NSDL National Science Digital Library

This Topic in Depth explores the science behind predicting the weather. First, the United States Search and Rescue Task Force describe the basic tools and knowledge used to create weather forecasts (1). Students can find concise, clear explanations of weather, fronts and air masses, high and low pressure, precipitation, and water vapor and humidity as well. By performing the activities presented in the second website, fourth grade students can learn about weather instruments and data collection (2). This website, produced by the Government of Saskatchewan, also explores how the weather can impact local communities. Third, Edheads offers a Macromedia Flash Player enhanced interactive module allowing students to predict the weather by examining weather maps (3 ). Through this website, users can become familiar with the concepts of warm and cold fronts, wind direction and speed, air pressure, and humidity. The fourth website, supplied by Annenberg / CPB, discusses weather satellites, Doppler radar, and additional tools forecasters use to predict the weather (4). Students can find a wind chill calculator along with a brief discussion of the history of forecasting and weather lore. Next, NOAA provides graphics for five forecast models: the ETA, the Global Forecast System (GFS), the Wave Watch III (WW3), the Nested Grid model (NGM), and the Rapid Update Cycle (RUC) (5). Outputs are available for North America, North Pacific, Western North Atlantic, and the Polar Ice Drift. Users can find links to detailed descriptions of the inputs and history of each model. Sixth, the British government's Met Office describes numerical modeling and its components (6). Students and educators can learn about the future in forecasting as well as educational opportunities with the Cooperative Program for Meteorology, Education, and Training (COMET).

256

Avoiding Death by Vacuum  

NASA Astrophysics Data System (ADS)

The two-Higgs doublet model (2HDM) can have two electroweak breaking, CP-conserving, minima. The possibility arises that the minimum which corresponds to the known elementary particle spectrum is metastable, a possibility we call the "panic vacuum". We present analytical bounds on the parameters of the softly broken Peccei-Quinn 2HDM which are necessary and sufficient conditions to avoid this possibility. We also show that, for this particular model, the current LHC data already tell us that we are necessarily in the global minimum of the theory, regardless of any cosmological considerations about the lifetime of the false vacua.

Barroso, A.; Ferreira, P. M.; Ivanov, I.; Santos, R.; Silva, João P.

2013-07-01

257

Environmental Education Tips: Weather Activities.  

ERIC Educational Resources Information Center

Provides weather activities including questions, on weather, heating the earth's surface, air, tools of the meteorologist, clouds, humidity, wind, and evaporation. Shows an example of a weather chart activity. (RT)

Brainard, Audrey H.

1989-01-01

258

Aircraft Weather Mitigation for the Next Generation Air Transportation System  

NASA Technical Reports Server (NTRS)

Atmospheric effects on aviation are described by Mahapatra (1999) as including (1) atmospheric phenomena involving air motion - wind shear and turbulence; (2) hydrometeorological phenomena - rain, snow and hail; (3) aircraft icing; (4) low visibility; and (5) atmospheric electrical phenomena. Aircraft Weather Mitigation includes aircraft systems (e.g. airframe, propulsion, avionics, controls) that can be enacted (by a pilot, automation or hybrid systems) to suppress and/or prepare for the effects of encountered or unavoidable weather or to facilitate a crew operational decision-making process relative to weather. Aircraft weather mitigation can be thought of as a continuum (Figure 1) with the need to avoid all adverse weather at one extreme and the ability to safely operate in all weather conditions at the other extreme. Realistic aircraft capabilities fall somewhere between these two extremes. The capabilities of small general aviation aircraft would be expected to fall closer to the "Avoid All Adverse Weather" point, and the capabilities of large commercial jet transports would fall closer to the "Operate in All Weather Conditions" point. The ability to safely operate in adverse weather conditions is dependent upon the pilot s capabilities (training, total experience and recent experience), the airspace in which the operation is taking place (terrain, navigational aids, traffic separation), the capabilities of the airport (approach guidance, runway and taxiway lighting, availability of air traffic control), as well as the capabilities of the airplane. The level of mitigation may vary depending upon the type of adverse weather. For example, a small general aviation airplane may be equipped to operate "in the clouds" without outside visual references, but not be equipped to prevent airframe ice that could be accreted in those clouds.

Stough, H. Paul, III

2007-01-01

259

Tactical lighting in special operations medicine: survey of current preferences.  

PubMed

Success in Special Operations Forces medicine (SOFMED) is dependent on maximizing visual capability without compromising the provider or casualty position when under fire. There is no single ideal light source suitable for varied SOFMED environments. We present the results of an online survey of Special Operations Medical Operators in an attempt to determine strengths and weaknesses of current systems. There was no consensus ideal hue for tactical illumination. Most Operators own three or more lights, and most lights were not night vision compatible. Most importantly, nearly 25% of respondents reported that lighting issues contributed to a poor casualty outcome; conversely, a majority (50 of 74) stated their system helped prevent a poor outcome. Based on the results of this initial survey, we can affirm that the design and choice of lighting is critical to SOFMED success. We are conducting ongoing studies to further define ideal systems for tactical applications including field, aviation, and marine settings. PMID:24227557

Calvano, Christopher J; Enzenauer, Robert W; Eisnor, Derek L; Laporta, Anthony J

2013-01-01

260

Artificial intelligence (AI) based tactical guidance for fighter aircraft  

NASA Technical Reports Server (NTRS)

A research program investigating the use of artificial intelligence (AI) techniques to aid in the development of a Tactical Decision Generator (TDG) for Within Visual Range air combat engagements is discussed. The application of AI programming and problem solving methods in the development and implementation of the Computerized Logic For Air-to-Air Warfare Simulations (CLAWS), a second generation TDG, is presented. The knowledge-based systems used by CLAWS to aid in the tactical decision-making process are outlined in detail, and the results of tests to evaluate the performance of CLAWS versus a baseline TDG developed in FORTRAN to run in real time in the Langley Differential Maneuvering Simulator, are presented. To date, these test results have shown significant performance gains with respect to the TDG baseline in one-versus-one air combat engagements, and the AI-based TDG software has proven to be much easier to modify and maintain than the baseline FORTRAN TDG programs.

Mcmanus, John W.; Goodrich, Kenneth H.

1990-01-01

261

Energy Efficient and Reliable Target Monitoring in the Tactical Battlefield  

NASA Astrophysics Data System (ADS)

In the tactical battlefield target monitoring it is crucial to take into account the energy efficiency and data reliability issues for the purpose of military decision making, especially in large scale sensor networks. However, due to the inherent nature of power constraint and wireless communication medium it is a challenging problem in the process of actual application. An efficient and reliable data aggregation scheme is proposed to enhance the performance of wireless sensor network used in the target monitoring. Firstly, the energy consumption model is presented and analyzed in the multihop WSNs. Then idea of mobile sinks, adaptive energy saving mechanism is introduced and the concept of multiple sinks cooperation is used to assure the reliability of the data aggregation. The simulation and the associated analysis show the improved results of the presented schema. At last the future discussion about the large scale tactical battlefield application is made to broaden the coming research scope.

Li, Yan-Xiao; Guan, Hua; Zhang, Yue-Ling

262

Measuring Experiential Avoidance in Adults: The Avoidance and Fusion Questionnaire  

ERIC Educational Resources Information Center

To date, general levels of experiential avoidance are primarily measured by the Acceptance and Action Questionnaire-II (AAQ-II), but it includes items of questionable comprehensibility. The Avoidance and Fusion Questionnaire for Youth (AFQ-Y), previously validated as a measure of experiential avoidance with children and adolescents, was…

Schmalz, Jonathan E.; Murrell, Amy R.

2010-01-01

263

Dynamic spectrum access in cognitive radio based tactical networks  

Microsoft Academic Search

In this paper, we investigate how cognitive radio (CR) enabled devices can self-organize to form a tactical mesh network and operate on non-dedicated (secondary) spectrum. Each node in the network constantly senses the environment and maintains an up-to-date spectrum usage report. This report is used by a central controller (CC) to initialize the network formation. Then the other CR nodes

Shamik Sengupta; Mainak Chatterjee; Kevin A. Kwiat

2009-01-01

264

Cross layer optimization in assured connectivity tactical mesh networks  

Microsoft Academic Search

Dynamic topology control schemes have been discussed earlier for continuously optimizing tactical mesh topologies to maximize the network connectivity. A dynamic optimization of the physical layer topology, however, is treated by layers-1 and 2 as a disruption and usually triggers re-computation of end-to-end paths. Higher layer routing algorithms may not always determine the same path as intended by the optimized

Jason R. Madsen; Daniel J. Tebben; Anurag Dwivedi; P. Harshavardhana; William Turner

2008-01-01

265

Tactical audio and acoustic rendering in biomedical applications  

Microsoft Academic Search

Complexity of biomedical data requires novel so- phisticated analysis and presentation methods. Sonification is used as a new information display in augmented reality systems to overcome problems of existing human-computer interface (e.g., opaque or heavy head-mounted displays, slow computer graphics, etc.). A novel taxonomy of sonification methods and techniques is introduced. We present our experience with tactical audio and acoustic

Emil Jovanov; Kristen Wegner; Vlada Radivojevic; Dusan Starcevic; M. S. Quinn; Daniel B. Karron

1999-01-01

266

Evolving an intelligent vehicle for tactical reasoning in traffic  

Microsoft Academic Search

Recent research in automated highway systems has ranged from low-level vision-based controllers to high-level route-guidance software. However there is currently no system for tactical-level reasoning. Such a system should address tasks such as passing cars, making exits on time, and merging into a traffic stream. Our approach to this intermediate-level planning combines a distributed reasoning system (PolySAPIENT) with a novel

Rahul Sukthankar; Shumeet Baluja; John Hancock

1997-01-01

267

[Selection of foraging tactics in leaf Warblers (phylloscopus)].  

PubMed

Aviary observations revealed particularities of foraging behavior in seven species of leaf warblers of the genus Phylloscopus, which sympatrically inhabit the middle-taiga Yenisei. The differences consist in the ratio of the tactics of each type, including the flight, frequency of using them, and selectivity with respect to maneuvers. The obtained results are discussed from the point of view of particularities of the external morphology of the species. PMID:21789995

Batova, O N

2011-01-01

268

Flight test of the YF-23A Advanced Tactical Fighter  

SciTech Connect

The paper describes the approach used in flight tests of the YF-23A Advanced Tactical Fighter (ATF), the fighter which was conceived as a replacement for the F-1 Eagle and which combines stealth techologies with a supercruise capability while retaining the agility necessary in an air superiority fighter. Special attention is given to the flight test concept, flight test preparations, and test objectives. The test methods, the problems encountered, and the test results are described.

Metz, P. (Northrop Corp., Aircraft Div., Los Angeles, CA (United States))

1992-02-01

269

A concurrent distributed system for aircraft tactical decision generation  

Microsoft Academic Search

A research program investigating the use of artificial intelligence (AI) techniques to aid in the development of a tactical decision generator (TDG) for within visual range (WVR) air combat engagements is discussed. The application of AI programming and problem-solving methods in the development and implementation of a concurrent version of the computerized logic for air-to-air warfare simulations (CLAWS) program, a

John W. McManus

1990-01-01

270

Technical-tactical analysis of youth olympic taekwondo combat.  

PubMed

The purpose of this study was to define the technical and tactical profiles of official youth taekwondo competitions played under the most recent rules of the International Taekwondo Federation. Tactical actions (i.e., attack, defense, and block), technical executions (from 1- to 4-point scores), kicking legs (i.e., front/rear and right/left), and overall technical effectiveness were investigated in relation to match outcome of semifinal and final competitions (n = 50) of youth (aged 13-14 years) black belt athletes during the Italian Taekwondo Cadet Championship. Differences (p < 0.001) were found among all action typologies (Attack: 50.9 ± 2.2%; Defense: 27.7 ± 1.5%; Block: 21.3 ± 1.6%), with winners showing fewer (p = 0.005) offensive actions and more (p = 0.001) defensive actions with respect to non-winners. Independently from match outcome, technical exchanges showed differences (p < 0.001) for technical executions. Winners resulted more efficient (p < 0.001) for both technical and tactical variables. In general, these findings showed that Cadets tend to adopt an offensive strategy. In considering that the adoption of the new electronic system requires athletes to execute correct technical actions to have a score assigned, coaches should emphasize the effectiveness of scoring techniques and help athletes to effectively improve their defense and counterattack capabilities. PMID:24077373

Tornello, Francesco; Capranica, Laura; Minganti, Carlo; Chiodo, Salvatore; Condello, Giancarlo; Tessitore, Antonio

2014-04-01

271

Soldier-worn augmented reality system for tactical icon visualization  

NASA Astrophysics Data System (ADS)

This paper describes the development and demonstration of a soldier-worn augmented reality system testbed that provides intuitive 'heads-up' visualization of tactically-relevant geo-registered icons. Our system combines a robust soldier pose estimation capability with a helmet mounted see-through display to accurately overlay geo-registered iconography (i.e., navigation waypoints, blue forces, aircraft) on the soldier's view of reality. Applied Research Associates (ARA), in partnership with BAE Systems and the University of North Carolina - Chapel Hill (UNC-CH), has developed this testbed system in Phase 2 of the DARPA ULTRA-Vis (Urban Leader Tactical, Response, Awareness, and Visualization) program. The ULTRA-Vis testbed system functions in unprepared outdoor environments and is robust to numerous magnetic disturbances. We achieve accurate and robust pose estimation through fusion of inertial, magnetic, GPS, and computer vision data acquired from helmet kit sensors. Icons are rendered on a high-brightness, 40°×30° field of view see-through display. The system incorporates an information management engine to convert CoT (Cursor-on-Target) external data feeds into mil-standard icons for visualization. The user interface provides intuitive information display to support soldier navigation and situational awareness of mission-critical tactical information.

Roberts, David; Menozzi, Alberico; Clipp, Brian; Russler, Patrick; Cook, James; Karl, Robert; Wenger, Eric; Church, William; Mauger, Jennifer; Volpe, Chris; Argenta, Chris; Wille, Mark; Snarski, Stephen; Sherrill, Todd; Lupo, Jasper; Hobson, Ross; Frahm, Jan-Michael; Heinly, Jared

2012-06-01

272

Paternal inheritance of growth in fish pursuing alternative reproductive tactics  

PubMed Central

In species with indeterminate growth, age-related size variation of reproductive competitors within each sex is often high. This selects for divergence in reproductive tactics of same-sex competitors, particularly in males. Where alternative tactics are fixed for life, the causality of tactic choice is often unclear. In the African cichlid Lamprologus callipterus, large nest males collect and present empty snail shells to females that use these shells for egg deposition and brood care. Small dwarf males attempt to fertilize eggs by entering shells in which females are spawning. The bourgeois nest males exceed parasitic dwarf males in size by nearly two orders of magnitude, which is likely to result from greatly diverging growth patterns. Here, we ask whether growth patterns are heritable in this species, or whether and to which extent they are determined by environmental factors. Standardized breeding experiments using unrelated offspring and maternal half-sibs revealed highly divergent growth patterns of male young sired by nest or dwarf males, whereas the growth of female offspring of both male types did not differ. As expected, food had a significant modifying effect on growth, but neither the quantity of breeding substrate in the environment nor ambient temperature affected growth. None of the environmental factors tested influenced the choice of male life histories. We conclude that in L. callipterus growth rates of bourgeois and parasitic males are paternally inherited, and that male and female growth is phenotypically plastic to only a small degree. PMID:23789072

Wirtz-Oca?a, Sabine; Schütz, Dolores; Pachler, Gudrun; Taborsky, Michael

2013-01-01

273

Tactical Defenses Against Systematic Variation in Wind Tunnel Testing  

NASA Technical Reports Server (NTRS)

This paper examines the role of unexplained systematic variation on the reproducibility of wind tunnel test results. Sample means and variances estimated in the presence of systematic variations are shown to be susceptible to bias errors that are generally non-reproducible functions of those variations. Unless certain precautions are taken to defend against the effects of systematic variation, it is shown that experimental results can be difficult to duplicate and of dubious value for predicting system response with the highest precision or accuracy that could otherwise be achieved. Results are reported from an experiment designed to estimate how frequently systematic variations are in play in a representative wind tunnel experiment. These results suggest that significant systematic variation occurs frequently enough to cast doubts on the common assumption that sample observations can be reliably assumed to be independent. The consequences of ignoring correlation among observations induced by systematic variation are considered in some detail. Experimental tactics are described that defend against systematic variation. The effectiveness of these tactics is illustrated through computational experiments and real wind tunnel experimental results. Some tutorial information describes how to analyze experimental results that have been obtained using such quality assurance tactics.

DeLoach, Richard

2002-01-01

274

Redefining Tactical Operations for MER Using Cloud Computing  

NASA Technical Reports Server (NTRS)

The Mars Exploration Rover Mission (MER) includes the twin rovers, Spirit and Opportunity, which have been performing geological research and surface exploration since early 2004. The rovers' durability well beyond their original prime mission (90 sols or Martian days) has allowed them to be a valuable platform for scientific research for well over 2000 sols, but as a by-product it has produced new challenges in providing efficient and cost-effective tactical operational planning. An early stage process adaptation was the move to distributed operations as mission scientists returned to their places of work in the summer of 2004, but they would still came together via teleconference and connected software to plan rover activities a few times a week. This distributed model has worked well since, but it requires the purchase, operation, and maintenance of a dedicated infrastructure at the Jet Propulsion Laboratory. This server infrastructure is costly to operate and the periodic nature of its usage (typically heavy usage for 8 hours every 2 days) has made moving to a cloud based tactical infrastructure an extremely tempting proposition. In this paper we will review both past and current implementations of the tactical planning application focusing on remote plan saving and discuss the unique challenges present with long-latency, distributed operations. We then detail the motivations behind our move to cloud based computing services and as well as our system design and implementation. We will discuss security and reliability concerns and how they were addressed

Joswig, Joseph C.; Shams, Khawaja S.

2011-01-01

275

Space Weather Now  

NSDL National Science Digital Library

The NOAA Space Weather Now website provides non-technical information and an assortment of images detailing current space weather. Visitors can find summaries describing auroras, plots of current auroral ovals on the poles, and viewing information for the Northern and Southern Hemispheres. The Real-Time Solar Wind Pages furnish dynamic plots of data, geomagnetic activity test product information, and resources about the four instruments used to collect data on geomagnetic storms. The website features Space Weather Scales to help the public understand the severity of environmental disturbances due to geomagnetic storms, solar radiation storms, and radio blackouts. Visitors can find the latest news, alerts, advisory bulletins, and much more.

276

Weather Observing Fundamentals  

NSDL National Science Digital Library

"Weather Observing Fundamentals" provides guidance for U.S. Navy Aerographer's Mates, Quartermasters, and civilian observers tasked with taking and reporting routine, special, and synoptic observations. Although the focus of this lesson is on shipboard observations, much of the content applies to land-based observing and reporting as well. The lesson details standard procedures for taking accurate weather observations and for encoding those observations on COMNAVMETOCCOM Report 3141/3. Exercises throughout the lesson and four weather identification drills at the end provide learners with opportunities to practice and build their skills. The lesson covers a large amount of content. You may wish to work through the material in multiple sessions.

2014-09-14

277

World Weather Information Service  

NSDL National Science Digital Library

The World Meteorological Organization Web site offers the World Weather Information Service page. Here, visitors will find official weather forecasts and climatological information for selected cities worldwide. Users choose a particular continent and country, and are then presented with a list of various cities they can get information on. This includes the date and time of the current forecast, minimum and maximum temperatures for that day, a general cloud description, and a monthly review of various data for that city. If for nothing else, the site does a good job of providing a very straightforward and easy way to find weather information from hundreds of cities around the globe.

278

Weather Map Assignment  

NSDL National Science Digital Library

I gave this assignment so that students could relate real-time weather changes to mid-latitude cyclones and air mass movement. Basically, by the time I assigned the project, we have discussed all the necessary weather phenomena and this project gives the students a way to apply what we have discussed to "reality" by explaining why the weather occurred the way it did over a short time period. It also provides me with a way to assess how well they are able to tie all the major concepts together, which is one of the goals of the course.

Brueseke, Matt

279

Weather and Climate  

NSDL National Science Digital Library

This unit introduces younger students to the concepts of weather and climate. Topics include the structure of the atmosphere, the definitions of weather and climate, and temperature and how it is measured. There are also discussions of heat transfers (radiation, conduction, convection), air pressure, wind, and the Coriolis effect. Other topics include types of storms, larger-scale weather systems such as pressure systems and fronts, and factors (insolation, land-sea breezes, orographic effect) that influence the climate in a given region. A vocabulary list and downloadable, printable student worksheets are provided.

Medina, Philip

280

Extreme Weather Sourcebook 2001  

NSDL National Science Digital Library

Originally reviewed in the February 26, 1999 Scout Report, the latest version of the National Center for Atmospheric Research (NCAR) Extreme Weather Sourcebook offers easy access to updated data on the economic damage from hurricanes, floods, and tornadoes in the United States and its territories. Time spans for each type of extreme weather vary, with hurricane data covering 1900-99, tornadoes 1950-99, floods 1955-1999, and lightning 1959-1994; however, all damage data are reported in constant 1999 dollars to simplify comparisons. The data are offered by weather event and state by rank or alphabetically.

2001-01-01

281

WeatherTracker  

NSDL National Science Digital Library

WeatherTracker is the ideal desktop application for anyone who always wants to know what the weather outside is like. The temperature, barometric pressure, humidity, winds, and current conditions can be displayed in three different formats, updated hourly for North American Cities. The local forecasts, climate data and near shore marine forecasts can be displayed in other windows and are available for select North American cities. Other cities are limited to temperature and current conditions. WeatherTracker is shareware with a fee of $20.00.

282

Avoiding dangerous climate change  

SciTech Connect

In 2005 the UK Government hosted the Avoiding Dangerous Climate Change conference to take an in-depth look at the scientific issues associated with climate change. This volume presents the most recent findings from the leading international scientists that attended the conference. The topics addressed include critical thresholds and key vulnerabilities of the climate system, impacts on human and natural systems, socioeconomic costs and benefits of emissions pathways, and technological options for meeting different stabilisation levels of greenhouse gases in the atmosphere. Contents are: Foreword from Prime Minister Tony Blair; Introduction from Rajendra Pachauri, Chairman of the IPCC; followed by 41 papers arranged in seven sections entitled: Key Vulnerabilities of the Climate System and Critical Thresholds; General Perspectives on Dangerous Impacts; Key Vulnerabilities for Ecosystems and Biodiversity; Socio-Economic Effects; Regional Perspectives; Emission Pathways; and Technological Options. Four papers have been abstracted separately for the Coal Abstracts database.

Hans Joachim Schellnhuber; Wolfgang Cramer; Nebojsa Nakicenovic; Tom Wigley; Gary Yohe (eds.)

2006-02-15

283

Preventing avoidable asthma deaths.  

PubMed

The UK has one of the highest death rates in Europe from asthma, with more than 20 people dying from the disease each week. Across the UK there is a five-fold variation in the number of hospital admissions for asthma almost certainly explained in part by variations in delivery, uptake and organisation of care. Deaths from asthma are frequently avoidable the findings from the National Review of Asthma Deaths have confirmed. A total of 276 cases were considered by the confidential enquiry panels and 195 confirmed as asthma deaths. Major avoidable factors were judged to be present in 60% of cases. Key findings from the report include: Almost half the patients (45%) died without seeking medical help or before help could be provided; 10% died within 28 days of discharge from hospital; 21% had attended A&E with asthma in the previous year; and only 23% had a personal asthma action plan. Over-prescription of short-acting bronchodilators and under-prescription of preventer inhalers was common. Every general practice should have a designated, named clinical lead for asthma services. Patients with asthma should be referred to a specialist asthma service if they have required more than two courses of systemic corticosteroids, oral or injected, in the previous 12 months or management using BTS steps 4 or 5 to achieve control. Any patient admitted to hospital or attending A&E with asthma should be reviewed, and control optimised, within a week of discharge. All asthma patients should have a written personal asthma action plan and should have a structured review by a healthcare professional with training. in asthma at least annually. PMID:25588282

Griffiths, Chris; Levy, Mark L

2014-09-01

284

Building a Weather-Ready Nation Winter Weather Safety  

E-print Network

-Ready Nation Flooding Winter Weather Safety www.weather.gov · Flooding is possible due to snowmelt, ice jams and coastal storms such as Nor'easters. · Ice jams are common during the winter. · As ice moves downstream www.weather.gov · Snow/Ice · Blizzards · Flooding · Cold Temperatures #12;Building a Weather

285

Weathering of Martian Evaporites  

NASA Technical Reports Server (NTRS)

Evaporites in martian meteorites contain weathering or alteration features that may provide clues about the martian near-surface environment over time. Additional information is contained in the original extended abstract.

Wentworth, S. J.; Velbel, M. A.; Thomas-Keprta, K. L.; Longazo, T. G.; McKay, D. S.

2001-01-01

286

Weathering in a Cup.  

ERIC Educational Resources Information Center

Two easy student activities that demonstrate physical weathering by expansion are described. The first demonstrates ice wedging and the second root wedging. A list of the needed materials, procedure, and observations are included. (KR)

Stadum, Carol J.

1991-01-01

287

Waste glass weathering  

SciTech Connect

The weathering of glass is reviewed by examining processes that affect the reaction of commercial, historical, natural, and nuclear waste glass under conditions of contact with humid air and slowly dripping water, which may lead to immersion in nearly static solution. Radionuclide release data from weathered glass under conditions that may exist in an unsaturated environment are presented and compared to release under standard leaching conditions. While the comparison between the release under weathering and leaching conditions is not exact, due to variability of reaction in humid air, evidence is presented of radionuclide release under a variety of conditions. These results suggest that both the amount and form of radionuclide release can be affected by the weathering of glass.

Bates, J.K.; Buck, E.C.

1993-12-31

288

Pareto Meta-heuristics for Generating Safe Flight Trajectories Under Weather Hazards  

Microsoft Academic Search

Abstract This paper compares ant colony optimization (ACO) and evolutionary multi-objective optimization (EMO) for the weather avoidance in a free flight environment. The problem involves a number,of potentially conflicting objectives such as minimizing deviations, weather avoidance, minimizing distance traveled and hard constraints like aircraft performance. Therefore, we modeled the problem as a multi-objective problem with the aim of finding a

Sameer Alam; Lam Thu Bui; Hussein A. Abbass; Michael Barlow

2006-01-01

289

TypoWeather  

NSDL National Science Digital Library

The TypoWeather application is a great way to stay on top of the latest weather conditions. This handy device presents users with a five day outlook and an hourly breakdown that is updated based on data from the National Meteorological Service. Visitors can customize their layout to include alerts about certain meteorological conditions, such as wind patterns, humidity, and more. This version is compatible with all operating systems.

2014-03-13

290

Wonderful World of Weather  

NSDL National Science Digital Library

This standards-based unit has been created for use by students in the elementary grades to investigate weather phenomena both locally as well as in other places around the world. By using hands-on activities and real-time data investigations, students develop a basic understanding of how weather can be described in measurable quantities. The lesson plans have been designed to allow teachers to select the ones which fit into their curriculum, and to allow for flexibility in implementation.

2011-01-01

291

Rates of Chemical Weathering  

NSDL National Science Digital Library

In this activity, students will investigate the weathering of rocks by chemical processes. They will use effervescent cleansing tablets as a model for rock, and vary surface area, temperature, and acidity to see how rapidly the "rock" dissolves. This investigation will help them understand three of the factors that affect the rate of chemical weathering and develop better understanding of how to design controlled experiments by exploring only one experimental variable at a time.

Passow, Michael

292

Weathering and Erosion  

NSDL National Science Digital Library

In this multi-station lab, learners conduct a series of experiments to explore the processes and effects of weathering and erosion. Using the results from these explorations, learners design and conduct an experiment comparing the rate of erosion in different biomes. Use this activity to teach weathering and erosion, and also to illustrate how scientists often use the results of one experiment to inspire another. This activity is intended to be conducted over multiple meetings.

Whitfield, Lise

2010-01-01

293

Extreme Weather Sourcebook: Tornadoes  

NSDL National Science Digital Library

The Extreme Weather Sourcebook is a database maintained by the Societal Impacts Program (SIP) at NCAR of statistics on extreme weather events. The Sourcebook is intended as a resource for researchers, policy makers, the media, and the general public, among other users. This page from the Sourcebook showcases data on tornado damages as total losses for the years 1950-2009 in the United States.

University Consortium for Atmospheric Research (UCAR)

294

Cockpit weather information system  

NASA Technical Reports Server (NTRS)

Weather information, periodically collected from throughout a global region, is periodically assimilated and compiled at a central source and sent via a high speed data link to a satellite communication service, such as COMSAT. That communication service converts the compiled weather information to GSDB format, and transmits the GSDB encoded information to an orbiting broadcast satellite, INMARSAT, transmitting the information at a data rate of no less than 10.5 kilobits per second. The INMARSAT satellite receives that data over its P-channel and rebroadcasts the GDSB encoded weather information, in the microwave L-band, throughout the global region at a rate of no less than 10.5 KB/S. The transmission is received aboard an aircraft by means of an onboard SATCOM receiver and the output is furnished to a weather information processor. A touch sensitive liquid crystal panel display allows the pilot to select the weather function by touching a predefined icon overlain on the display's surface and in response a color graphic display of the weather is displayed for the pilot.

Tu, Jeffrey Chen-Yu (Inventor)

2000-01-01

295

A QOS framework design based on DiffServ and SNMP for tactical networks  

Microsoft Academic Search

In the theater of war, mission-critical information is delivered over tactical networks, and a brigade dynamically conducts close combats and tactical operations on the basis of the military information. Therefore, the quality of service (QoS) of military information should be guaranteed to successfully perform tactical operations in the battle field. In this paper, the concern is a QoS framework design,

Bong Chan Kim; Youngchul Bang; Yongi Kim; Jae Young Lee; Dong Gu Kwak; Hwang Soo Lee; Joong Soo Ma

2008-01-01

296

2012 Severe Weather Awareness Guide  

E-print Network

Florida's 2012 Severe Weather Awareness Guide 2012 Severe Weather Awareness Guide F L O R I D A D I of Emergency Management #12;Florida's Severe Weather Awareness Guide 2 Florida is affected by many natural. That is why I am proud to present the 2012 Severe Weather Awareness Guide. By reading this guide you can learn

Meyers, Steven D.

297

Affective Decision-Making and Tactical Behavior of Under-15 Soccer Players  

PubMed Central

Affective decision-making is a type of Executive Function related to cost benefit analysis in situations where gains and losses imply direct consequences for the subject. The purpose of this study was to explore the influence of the affective decision-making on tactical behavior in soccer players under the age of 15 years old. The System of Tactical Assessment in Soccer (FUT-SAT) was used to assess tactical behavior. To evaluate affective decision-making, we used the neuropsychological test called The Iowa Gambling Task (IGT). The values of the offensive, defensive and game tactical behavior of participants were used to create performance groups. The low (?25%) and high (?75%) groups, according to offensive, defensive and game tactical behavior, were compared and shown to be different. The values of the IGT net score of the participants with low and high tactical behavior were compared using the non-parametric Mann-Whitney test. Statistically significant differences between the groups were observed for Defensive Tactical Behavior (Z?=??3.133; p?=?0.002; r?=??0.355) and Game Tactical Behavior (Z?=??2.267; p?=?0.023; r?=??0.260). According to these results, it is possible to state that affective decision-making can influence the tactical behavior of under-15 soccer players. PMID:24978030

Gonzaga, Adeilton dos Santos; Albuquerque, Maicon Rodrigues; Malloy-Diniz, Leandro Fernandes; Greco, Pablo Juan; Teoldo da Costa, Israel

2014-01-01

298

Mating Tactics and Reproductive Success in Male Columbian Ground Squirrels (Urocitellus columbianus) .  

E-print Network

??The widespread discovery of multiple mating tactics, particularly among males, highlights the diverse ways sexual selection may operate within a population. In polygynandrous populations, multiple… (more)

Balmer, Adele

2010-01-01

299

CAT altitude avoidance system  

NASA Technical Reports Server (NTRS)

A method and apparatus are provided for indicating the altitude of the tropopause or of an inversion layer wherein clear air turbulence (CAT) may occur, and the likely severity of any such CAT, includes directing a passive microwave radiometer on the aircraft at different angles with respect to the horizon. The microwave radiation measured at a frequency of about 55 GHz represents the temperature of the air at an ""average'' range of about 3 kilometers, so that the sine of the angle of the radiometer times 3 kilometers equals the approximate altitude of the air whose temperature is measured. A plot of altitude (with respect to the aircraft) versus temperature of the air at that altitude, can indicate when an inversion layer is present and can indicate the altitude of the tropopause or of such an inversion layer. The plot can also indicate the severity of any CAT in an inversion layer. If CAT has been detected in the general area, then the aircraft can be flown at an altitude to avoid the tropopause or inversion layer.

Gary, B. L. (inventor)

1982-01-01

300

Coal Field Fire Fighting - Practiced methods, strategies and tactics  

NASA Astrophysics Data System (ADS)

Subsurface coal fires destroy millions of tons of coal each year, have an immense impact to the ecological surrounding and threaten further coal reservoirs. Due to enormous dimensions a coal seam fire can develop, high operational expenses are needed. As part of the Sino-German coal fire research initiative "Innovative technologies for exploration, extinction and monitoring of coal fires in Northern China" the research team of University of Wuppertal (BUW) focuses on fire extinction strategies and tactics as well as aspects of environmental and health safety. Besides the choice and the correct application of different extinction techniques further factors are essential for the successful extinction. Appropriate tactics, well trained and protected personnel and the choice of the best fitting extinguishing agents are necessary for the successful extinction of a coal seam fire. The chosen strategy for an extinction campaign is generally determined by urgency and importance. It may depend on national objectives and concepts of coal conservation, on environmental protection (e.g. commitment to green house gases (GHG) reductions), national funding and resources for fire fighting (e.g. personnel, infrastructure, vehicles, water pipelines); and computer-aided models and simulations of coal fire development from self ignition to extinction. In order to devise an optimal fire fighting strategy, "aims of protection" have to be defined in a first step. These may be: - directly affected coal seams; - neighboring seams and coalfields; - GHG emissions into the atmosphere; - Returns on investments (costs of fire fighting compared to value of saved coal). In a further step, it is imperative to decide whether the budget shall define the results, or the results define the budget; i.e. whether there are fixed objectives for the mission that will dictate the overall budget, or whether the limited resources available shall set the scope within which the best possible results shall be achieved. For an effective and efficient fire fighting optimal tactics are requiered and can be divided into four fundamental tactics to control fire hazards: - Defense (digging away the coal, so that the coal can not begin to burn; or forming a barrier, so that the fire can not reach the not burning coal), - Rescue the coal (coal mining of a not burning seam), - Attack (active and direct cooling of burning seam), - Retreat (only monitoring till self-extinction of a burning seam). The last one is used when a fire exceeds the organizational and/or technical scope of a mission. In other words, "to control a coal fire" does not automatically and in all situations mean "to extinguish a coal fire". Best-practice tactics or a combination of them can be selected for control of a particular coal fire. For the extinguishing works different extinguishing agents are available. They can be applied by different application techniques and varying distinctive operating expenses. One application method may be the drilling of boreholes from the surface or covering the surface with low permeability soils. The mainly used extinction agents for coal field fire are as followed: Water (with or without additives), Slurry, Foaming mud/slurry, Inert gases, Dry chemicals and materials and Cryogenic agents. Because of its tremendous dimension and its complexity the worldwide challenge of coal fires is absolutely unique - it can only be solved with functional application methods, best fitting strategies and tactics, organisation and research as well as the dedication of the involved fire fighters, who work under extreme individual risks on the burning coal fields.

Wündrich, T.; Korten, A. A.; Barth, U. H.

2009-04-01

301

MEST- avoid next extinction  

NASA Astrophysics Data System (ADS)

Asteroid 2011 AG5 will impact on Earth in 2040. (See Donald K. Yoemans, ``Asteroid 2011 AG5 - A Reality Check,'' NASA-JPL, 2012) In 2011, The author say: the dark hole will take the dark comet to impact our solar system in 20 years, and give a systemic model between the sun and its companion-dark hole to explain why were there periodicity mass extinction on earth. (see Dayong Cao, BAPS.2011.CAL.C1.7, BAPS.2011.DFD.LA.24, BAPS.2012.APR.K1.78 and BAPS.2011.APR.K1.17) The dark Asteroid 2011 AG5 (as a dark comet) is made of the dark matter which has a space-time (as frequence-amplitude square) center- a different systemic model from solar systemic model. It can asborb the space-time and wave. So it is ``dark.'' When many dark matters hit on our earth, they can break our atom structure and our genetic code to trigger the Mass Extinction. In our experiments, consciousness can change the systematic model and code by a life-informational technology. So it can change the output signals of the solar cell. (see Dayong Cao, BAPS.2011.MAR.C1.286 and BAPS.2012.MAR.P33.14) So we will develop the genetic code of lives to evolution and sublimation, will use the dark matter to change the systemic model between dark hole and sun and will avoid next extinction.

Cao, Dayong

2012-11-01

302

Oceans, Climate and Weather  

NSDL National Science Digital Library

What is the difference between weather and climate? What do the oceans have to do with them? Weather is the day-to-day state of the atmosphere and its short-term (minutes to weeks) variation. Climate is typically described by the regional patterns of seasonal temperature and precipitation over 30 years. The averages of annual temperature, rainfall, cloud cover, and depth of frost penetration are all typical climate-related statistics. The oceans influence the worlds climate by storing solar energy and distributing it around the planet through currents and atmospheric winds.This publication is all about developing your students understandings of earths oceans and the major effect they have on climate. Understanding and interpreting local weather data and understanding the relationship between weather and climate are important first steps to understanding larger-scale global climate changes. Activities that ask students to collect and analyze local weather data as well as analyze global data can be found in the Lessons and Activities section. Analyzing and interpreting data is a major focus of this publication. Numerous data sets can be found in the Sources for Real Data section. The Background Information section and the article Tomorrows Forecast will help reinforce your own content knowledge.

Lightle, Kimberly

2006-01-01

303

United States army tactical high-energy laser program  

NASA Astrophysics Data System (ADS)

The tactical high energy laser (THEL) program, conducted from 1996 to 2005, successfully demonstrated the capability of a high-energy laser to counter rockets, artillery, and mortars. The program was a US/Israeli cooperative research and development effort that was designated by the Secretary of Defense as an advanced concept technology demonstration with Presidential interest. The THEL system was designed and built under an SMDC/ARSTART prime contract awarded to TRW (now, Northrop Grumman Corporation), jointly managed by the Israel Ministry of Defence Directorate of Defence Research & Development. We summarize the effort and highlight some of the "firsts" of the THEL program.

Wachs, John J.; Wilson, Gerald T.

2013-02-01

304

Small molecule unlocks key prostate cancer survival tactic  

Cancer.gov

The most recent in a series of studies from a team at the UC Davis Comprehensive Cancer Center has shown that a single molecule is at the heart of one of the most basic survival tactics of prostate cancer cells. A paper published by the Public Library of Science identifies a microRNA called miR-125b as a potential target for treatments designed to stop the proliferation of prostate cancer cells, particularly in patients who have developed a late-stage form of the disease resistant to androgen deprivation therapy.

305

Broadband terahertz spectroscopy of polypropylenes with different tacticities  

NASA Astrophysics Data System (ADS)

We apply Fourier transform terahertz spectroscopy to an investigation of polypropylenes (PPs) with different tacticities. Terahertz (THz) absorption spectra were measured for isotactic, syndiotactic, and atactic samples over a frequency range of 1–11 THz. A clear difference in the spectra of the isotactic and syndiotactic PPs was observed, while that of the atactic PP did not display any clear characteristic absorption peaks. The spectral differences are thought to originate from not only the primary structure but also intermolecular vibrations of the well-packed PP-chains in the crystal structure. Broadband THz spectroscopy offers a nondestructive, noninvasive inspection technique for general-purpose plastics.

Ariyoshi, S.; Hiroshiba, N.; Tanzawa, Y.; Ichikawa, Y.; Bae, J.

2014-12-01

306

Large-Scale Weather  

NSDL National Science Digital Library

In the previous chapter, we dealt with how the properties of air and water affected small-scale weather such as the formation of clouds, the formation of fog, and how comfortable you feel at different times of the year. In this chapter, we're going to go global, talking about major interactions between the Sun and Earth, the resulting effects on large air masses, and how these major interactions help us figure out what the weather's going to be tomorrow. As discussed earlier in the book, when science concepts are applied to the real world, things don't always work out exactly as expected. However, it is possible to get an overall picture of what's happening in large-scale weather.

Robertson, William C.

2005-01-01

307

Delicious Differential Weathering  

NSDL National Science Digital Library

Students are asked to place a Baby Ruth candy bar in their mouths but are asked not to bite it. Once they have sucked off all the chocolate and caramel the students are given permission to bite the peanuts. After lecturing on the differences between chemical and physical weathering students are asked to list the order of ingredients they tasted. Each group is given a sample of granite. Students are asked to list three visible minerals in the granite. Relate the minerals of the granite (hornblende, feldspar, and quartz) to the ingredients of the candy bar. Explain Bowen's reaction series and how different minerals will weather first and how climate will affect weathering rates.

Gorte, Mary

308

Weather Station Model  

NSDL National Science Digital Library

This lesson instructs students on how to read station models, the symbols used on weather maps to show data (temperature, wind speed and direction, barometeric pressure, etc.) for a given reporting station. It includes a diagram of a station model, an explanation of the data conveyed by the numbers and symbols, and a table of definitions for the graphic symbols used with models. There is also a set of interactive station models students can use for practice at interpretation, and an interactive exercise in which students use real-time weather data to interpret models.

309

Reading Weather Maps  

NSDL National Science Digital Library

From the University of Illinois at Urbana-Champaign's Department of Atmospheric Sciences comes the Reading Weather Maps Web site. Visitors learn how to convert their local time to the standard used by all meteorologists; to tell the difference between Kelvin, Celsius, and Fahrenheit temperatures; and how to read maps with weather data collected on and above the Earth's surface. For example, wind bards, which are flag-like symbols that indicate wind direction and wind speed, always point in the direction the wind is blowing "from." Other interesting facts, descriptions, and illustrations are available on the site.

1969-12-31

310

Weather and Climate  

NSDL National Science Digital Library

This background chapter reviews the basic principles of meteorology that educators need to guide inquiry activities in the classroom. Topics include structure of the atmosphere, Coriolis effect, water cycle, greenhouse effect, cyclones, anticyclones, and jet streams. This is chapter 2 of Meteorology: An Educator's Resource for Inquiry-Based Learning for Grades 5-9. The guide includes a discussion of learning science, the use of inquiry in the classroom, instructions for making simple weather instruments, and more than 20 weather investigations ranging from teacher-centered to guided and open inquiry investigations.

311

Weather and Health  

NSDL National Science Digital Library

This course will help meteorologists and others broaden their understanding of the impacts of weather and climate on public health, including the impacts of heat waves and cold temperatures, winter storms and thunderstorms, flooding, drought, poor air quality, tornadoes, hurricanes, wildfire, UV radiation, and others. This course is directed to broadcast meteorologists, in particular, who play a critical role in the community by helping the public to protect against weather-related health threats and by promoting good health. The course also describes the public health communication system, providing information about reliable public health services, tools, and resources.

Comet

2008-11-25

312

Wonderful World of Weather  

NSDL National Science Digital Library

This standards-based module uses hands-on activities and real-time data investigations to allow students in the elementary grades to investigate weather phenomena both locally as well as in other places around the world. By using hands-on activities and real-time data investigations, the students will develop a basic understanding of how weather can be described in measurable quantities, such as temperature, wind and precipitation. The lesson plans which make up this module have been designed to allow teachers to select the ones which fit into their curriculum to allow for flexibility in implementation

2003-01-01

313

The Effect of NEXRAD Image Looping and National Convective Weather Forecast Product on Pilot Decision Making in the Use of a Cockpit Weather Information Display  

NASA Technical Reports Server (NTRS)

This experiment investigated improvements to cockpit weather displays to better support the hazardous weather avoidance decision-making of general aviation pilots. Forty-eight general aviation pilots were divided into three equal groups and presented with a simulated flight scenario involving embedded convective activity. The control group had access to conventional sources of pre-flight and in-flight weather products. The two treatment groups were provided with a weather display that presented NEXRAD mosaic images, graphic depiction of METARs, and text METARs. One treatment group used a NEXRAD image looping feature and the second group used the National Convective Weather Forecast (NCWF) product overlaid on the NEXRAD display. Both of the treatment displays provided a significant increase in situation awareness but, they provided incomplete information required to deal with hazardous convective weather conditions, and would require substantial pilot training to permit their safe and effective use.

Burgess, Malcolm A.; Thomas, Rickey P.

2004-01-01

314

Efficiency of multiparty networking protocols over mobile tactical radios on VHF bands  

Microsoft Academic Search

Multiparty routing protocols for resource constraint VHF Mobile Tactical Networks are studied by employing a modeling platform that integrates VHF tactical radio signal measurement data and practical network deployment scenarios. The standard approach of Simplified Multicast Forwarding based on the 2-hop neighborhood information and a typical alternative using 1-hop network clustering are compared to examine their overhead cost and their

Li Li; Thomas Kunz

2010-01-01

315

Efficient assignment of multicast groups to publish-subscribe information topics in tactical networks  

Microsoft Academic Search

A key challenge in a network-centric tactical environment is disseminating information related to sensors, situational awareness, and command and control to the appropriate receivers in a timely, reliable and efficient fashion. IP multicast is the transport mechanism used for information dissemination. It is typically the case in tactical networks that the number of IP multicast addresses available for use is

Shobha Erramilli; Shrirang Gadgil; Narayanan Natarajan

2008-01-01

316

An experimental approach to altering mating tactics in male horseshoe crabs (Limulus polyphemus)  

Microsoft Academic Search

Alternative reproductive tactics are often correlated with phenotype, density, environment, or social context. Male horseshoe crabs (Limulus polyphemus) have two mating tactics that are associated with phenotype. Males in good condition arrive at the nesting beach and spawn while attached to females, whereas those in poorer condition come ashore unattached and crowd around the nesting couples as satellites, fertilizing eggs

H. Jane Brockmann

2002-01-01

317

Control of a Tactical Vehicle Using Gain Scheduled Fast Output Sampling Technique  

Microsoft Academic Search

The tactical vehicle is an inherently unstable system which makes a stabilizing controller mandatory. This paper presents a strategy for the stabilization of the trajectory of a tactical vehicle. A nonlinear pitch plane vehicle model has been considered for this purpose. This model has been linearised about various operating points in the vehicle tra- jectory to obtain a set of

S. Janardhanan; B. Bandyopadhyay

318

Male reproductive tactics in the mallard, Anas platyrhynchos : social and hormonal mechanisms  

Microsoft Academic Search

It has been proposed that pair status is a proximate cue influencing the mating tactics adopted by male waterfowl. Specifically, it is thought that, compared to unpaired males, paired males are more likely to force extra-pair copulations, but are less likely to court females. Currently, it is unclear how social cues interact with physiological mechanisms affecting male mating tactics. Because

Ellen S. Davis

2002-01-01

319

Tactics and Strategies of Relationship-Based Practice: Reassessing the Institutionalization of Community Literacy  

ERIC Educational Resources Information Center

This essay revises Paula Mathieu's call for relationship-based tactics of engagement over institution-based strategies. Because engaged scholars operate within institutional contexts, they should utilize both tactics and strategies to make the academic institutional paradigm more conducive to relationship-based engagement. In supporting this…

Feigenbaum, Paul

2011-01-01

320

The Use and Acceptance of Sexually Aggressive Tactics in College Men  

ERIC Educational Resources Information Center

This study extended the findings of Cleveland, Koss, and Lyon's (1999) research on rape tactics to a sample of college men by examining the use and acceptance of sexually aggressive tactics. Participants included 297 male undergraduate students who filled out instruments assessing for a history of sexual aggression and other personality…

Warkentin, Jennifer B.; Gidycz, Christine A.

2007-01-01

321

The Impact of Feminine Identity and Soft Influence Tactics on Leadership Style  

Microsoft Academic Search

Using sex identity theory, the paper studies the impact of feminine identity and soft influence tactics on leadership styles, specifically task oriented and participative. Earlier researchers have documented difference in the working and leadership styles of men and women and tactics used for securing compliance from team members. Yet there are few studies which have proceeded beyond an understanding of

Asha Kaul; Jithesh K. Kumar

322

Fertilization dynamics of sperm from different male mating tactics in bluegill (Lepomis macrochirus)  

E-print Network

Fertilization dynamics of sperm from different male mating tactics in bluegill (Lepomis macrochirus (Lepomis macrochirus Rafinesque, 1819) mâles en fonction de deux tactiques d'accouplement, celles de l the fertilization dynamics of alternative mating tactics (cuckolders and parentals) of male bluegill (Lepomis

Schulte-Hostedde, Albrecht

323

The Palace of Memory: Virtual Tourism and Tours of Duty in Tactical Iraqi and Virtual Iraq  

Microsoft Academic Search

This paper discusses two projects developed at the University of Southern California with funding from the U.S. military: Tactical Iraqi, a videogame that is designed to accelerate a learner's acquisition of spoken Arabic to assist in the rapid deployment of soldiers into volatile tactical situations, and Virtual Iraq, a virtual reality simulation intended to lessen the effects of Post-Traumatic Stress

Elizabeth Losh

2006-01-01

324

11 . Alternative reproductive tactics In amphibians KELLY R . ZAMUDIO AND LAURE  

E-print Network

11 . Alternative reproductive tactics In amphibians KELLY R . ZAMUDIO AND LAURE CHAPTER SUMMARY Frogs and salamanders, the two most diverse lin~agcs of amphibians, differ significantly in reproductive of alternative reproductive tactics. However, OUf understanding of the evolution of amphibian alternative

Zamudio, Kelly R.

325

Pragmatic tactics in diplomatic communication: a case study of Ola Rotimi's Ovonramwen Nogbaisi  

Microsoft Academic Search

This paper describes the features of pragmatic tactics in diplomatic communication in Ola Rotimi's play, Ovonramwen Nogbaisi. The paper observes that even though some major characters employ various pragmatic tactics to achieve successful communication in the play, the tragic conclusion of the play derives mainly from a breakdown in communication between some other major characters. Using relevant extracts of dialogue

Wale Adegbite

2005-01-01

326

Tactical information management sys-tems increasingly run in net-centric  

E-print Network

presents an overview of DDS that is geared to software architects. We also discuss the DDS QoS policies tactical information management in net-centric systems like the GIG ­ the OMG has adopted the DDS-centric tactical information management systems [2]. DDS is used in a wide range of military and commercial systems

Tucci, Sara

327

The use of genetic markers to estimate the frequency of successful alternative reproductive tactics  

Microsoft Academic Search

This paper outlines a method for estimating rates of successful alternative reproductive tactics from parental exclusions known through the use of genetic markers. We review a method for calculating the probability of excluding a putative father when he is not the actual father. We adapt this method to model two mating tactics of concern to sociobiologists: extrapair copulations (EPCs) and

David F. Westneat; Peter C. Frederick; R. Haven Wiley

1987-01-01

328

Net-centric communities for the tactical environment  

NASA Astrophysics Data System (ADS)

Tactical net-centric systems must support the exchange of multi-media information among traditional and non-traditional partners in a highly complex and dynamic environment across the full spectrum of operations. These systems also need to support the establishment of both static and dynamic groups of users able to get the right information, to the right person, at the right time, with adequate information assurance - all without compromising the ability of others to use the limited network resources to do the same. We refer to these dynamic groups of users as Communities of Interest (CoIs). CoIs provide a conceptual framework in which these capabilities can be implemented whilst ensuring usability, agility, security and an overall management approach that abstracts away the complexities and challenges of the operational environment. This paper introduces several system technologies in the areas of networking, security and information management and puts them into an evolutionary system context that realizes maximum returns on investments, facilitating the achievement of net-centricity in the tactical environment.

Adcock, Mark; Crocker, Mel; Morton, Cindy; Stein, Fred

2008-04-01

329

Engineering a responsive, low cost, tactical satellite, TACSAT-1  

NASA Astrophysics Data System (ADS)

The Secretary of Defense's Office of Force Transformation (OFT) is currently undertaking an initiative to develop a low-cost, responsive, operationally relevant space capability using small satellites. The Naval Research Laboratory (NRL) is tasked to be program manger for this initiative, which seeks to make space assets and capabilities available to operational users. TacSat-1 is the first in a series of small satellites that will result in rapid, tailored, and operationally relevant experimental space capabilities for tactical forces. Components of the resulting tactical architecture include a highly automated small satellite bus, modular payloads, common launch and payload interfaces, tasking and data dissemination using the SIPRNET (Secret Internet Protocol Routing Network), and low cost, rapid response launches. The overall goal of TacSat-1 is to demonstrate the utility of a broader complementary business model and provide a catalyst for energizing DoD and industry in the operational space area. This paper first provides a brief overview of the TacSat- 1 experiment and then discusses the engineering designs and practices used to achieve the aggressive cost and schedule goals. Non-standard approaches and engineering philosophies that allowed the TacSat-1 spacecraft to be finished in twelve months are detailed and compared with "normal" satellite programs where applicable. Specific subsystem design, integration and test techniques, which contributed to the successful completion of the TacSat-1 spacecraft, are reviewed. Finally, lessons learned are discussed.

Hurley, M.; Duffey, T.; Huffine, Christopher; Weldy, Ken; Clevland, Jeff; Hauser, Joe

2004-11-01

330

Integrated strategic and tactical biomass-biofuel supply chain optimization.  

PubMed

To ensure effective biomass feedstock provision for large-scale biofuel production, an integrated biomass supply chain optimization model was developed to minimize annual biomass-ethanol production costs by optimizing both strategic and tactical planning decisions simultaneously. The mixed integer linear programming model optimizes the activities range from biomass harvesting, packing, in-field transportation, stacking, transportation, preprocessing, and storage, to ethanol production and distribution. The numbers, locations, and capacities of facilities as well as biomass and ethanol distribution patterns are key strategic decisions; while biomass production, delivery, and operating schedules and inventory monitoring are key tactical decisions. The model was implemented to study Miscanthus-ethanol supply chain in Illinois. The base case results showed unit Miscanthus-ethanol production costs were $0.72L(-1) of ethanol. Biorefinery related costs accounts for 62% of the total costs, followed by biomass procurement costs. Sensitivity analysis showed that a 50% reduction in biomass yield would increase unit production costs by 11%. PMID:24508904

Lin, Tao; Rodríguez, Luis F; Shastri, Yogendra N; Hansen, Alan C; Ting, K C

2014-03-01

331

Airborne Tactical Intent-Based Conflict Resolution Capability  

NASA Technical Reports Server (NTRS)

Trajectory-based operations with self-separation involve the aircraft taking the primary role in the management of its own trajectory in the presence of other traffic. In this role, the flight crew assumes the responsibility for ensuring that the aircraft remains separated from all other aircraft by at least a minimum separation standard. These operations are enabled by cooperative airborne surveillance and by airborne automation systems that provide essential monitoring and decision support functions for the flight crew. An airborne automation system developed and used by NASA for research investigations of required functionality is the Autonomous Operations Planner. It supports the flight crew in managing their trajectory when responsible for self-separation by providing monitoring and decision support functions for both strategic and tactical flight modes. The paper focuses on the latter of these modes by describing a capability for tactical intent-based conflict resolution and its role in a comprehensive suite of automation functions supporting trajectory-based operations with self-separation.

Wing, David J.; Vivona, Robert A.; Roscoe, David A.

2009-01-01

332

Artificial Intelligence (AI) Based Tactical Guidance for Fighter Aircraft  

NASA Technical Reports Server (NTRS)

A research program investigating the use of Artificial Intelligence (AI) techniques to aid in the development of a Tactical Decision Generator (TDG) for Within Visual Range (WVR) air combat engagements is discussed. The application of AI programming and problem solving methods in the development and implementation of the Computerized Logic For Air-to-Air Warfare Simulations (CLAWS), a second generation TDG, is presented. The Knowledge-Based Systems used by CLAWS to aid in the tactical decision-making process are outlined in detail, and the results of tests to evaluate the performance of CLAWS versus a baseline TDG developed in FORTRAN to run in real-time in the Langley Differential Maneuvering Simulator (DMS), are presented. To date, these test results have shown significant performance gains with respect to the TDG baseline in one-versus-one air combat engagements, and the AI-based TDG software has proven to be much easier to modify and maintain than the baseline FORTRAN TDG programs. Alternate computing environments and programming approaches, including the use of parallel algorithms and heterogeneous computer networks are discussed, and the design and performance of a prototype concurrent TDG system are presented.

McManus, John W.; Goodrich, Kenneth H.

1990-01-01

333

Graphical user interface concepts for tactical augmented reality  

NASA Astrophysics Data System (ADS)

Applied Research Associates and BAE Systems are working together to develop a wearable augmented reality system under the DARPA ULTRA-Vis program†. Our approach to achieve the objectives of ULTRAVis, called iLeader, incorporates a full color 40° field of view (FOV) see-thru holographic waveguide integrated with sensors for full position and head tracking to provide an unobtrusive information system for operational maneuvers. iLeader will enable warfighters to mark-up the 3D battle-space with symbologic identification of graphical control measures, friendly force positions and enemy/target locations. Our augmented reality display provides dynamic real-time painting of symbols on real objects, a pose-sensitive 360° representation of relevant object positions, and visual feedback for a variety of system activities. The iLeader user interface and situational awareness graphical representations are highly intuitive, nondisruptive, and always tactically relevant. We used best human-factors practices, system engineering expertise, and cognitive task analysis to design effective strategies for presenting real-time situational awareness to the military user without distorting their natural senses and perception. We present requirements identified for presenting information within a see-through display in combat environments, challenges in designing suitable visualization capabilities, and solutions that enable us to bring real-time iconic command and control to the tactical user community.

Argenta, Chris; Murphy, Anne; Hinton, Jeremy; Cook, James; Sherrill, Todd; Snarski, Steve

2010-04-01

334

Avoidance of the Alcoholic Client.  

ERIC Educational Resources Information Center

Explores the widespread avoidance of the identification and treatment of alcoholism by the social work profession. Examines the underlying causes of this avoidance and suggests guidelines to overcome the organizational and the professional barriers that have kept alcoholics from seeking social work treatment. (Author/JAC)

Googins, Bradley

1984-01-01

335

Collision Avoidance Radar for UAV  

Microsoft Academic Search

A critical sensor characteristic for obstacle awareness and avoidance for UAV is assessed with the compliance of the equivalent level of safety regulation. Based on the assessment of the obstacle awareness and collision avoidance sensor, the small-sized, light-weighted radar sensor is proposed for the suitable candidate in meeting with the system requirement as well as operational requirement of smart unmanned

Young K Kwag; Min S Choi; Chul H Jung; Kwang Y Hwang

2006-01-01

336

Weatherization Works: An interim report of the National Weatherization Evaluation  

SciTech Connect

The National Weatherization Evaluation is the first comprehensive evaluation of the Weatherization Assistance Program since 1984. The evaluation was designed to accomplish the following goals: Estimate energy savings and cost effectiveness; Assess nonenergy impacts; Describe the weatherization network; Characterize the eligible population and resources; and Identify factors influencing outcomes and opportunities for the future. As a national program, weatherization incorporates considerable diversity due to regional differences. Therefore, evaluation results are presented both in aggregate and for three climate regions: cold, moderate and hot.

Brown, M.A.; Berry, L.G. [Oak Ridge National Lab., TN (United States); Kinney, L.F. [Synertech Systems Corp., Syracuse, NY (United States)

1993-11-01

337

Mate retention tactics in Spain: personality, sex differences, and relationship status.  

PubMed

Mate retention is an important problem in romantic relationships because of mate poachers, infidelity, and the risk of outright defection. The current study (N=892) represents the first study of mate retention tactics conducted in Spain. We tested hypotheses about the effects of gender, relationship commitment status, and personality on mate retention tactics. Women and men differed in the use of resource display, appearance enhancement, intrasexual violence, and submission/self-abasement as mate retention tactics. Those in more committed relationships reported higher levels of resource display, appearance enhancement, love, and verbal signals of possession. Those in less committed relationships more often reported intentionally evoking jealousy in their partner as a mate retention tactic. Personality characteristics, particularly Neuroticism and Agreeableness, correlated in coherent ways with mate retention tactics, supporting two evolution-based hypotheses. Discussion focuses on the implications, future research directions, and interdisciplinary syntheses emerging between personality and social psychology and evolutionary psychology. PMID:21534964

de Miguel, Adelia; Buss, David M

2011-06-01

338

Effects of expert testimony and interrogation tactics on perceptions of confessions.  

PubMed

Evidence obtained through the process of interrogation is frequently undermined by what can be perceived as overzealous interrogation tactics. Although the majority of psychologically oriented tactics are legally permissible, they nonetheless contribute to innocent suspects confessing to crimes they did not commit. The present study examined the effect of expert testimony and interrogation tactics on perceptions of a confession. 182 undergraduates read a transcript of a homicide trial that varied based on interrogation tactic: implicit threat of punishment (maximization) or leniency (minimization) and expert witness testimony (presence or absence of expert testimony). Analysis indicated that the type of interrogation tactic used in obtaining the confession affected participants' perceptions of the coerciveness of the interrogation process. PMID:17564233

Moffa, Morgan S; Platania, Judith

2007-04-01

339

Cold Weather Pet Safety  

MedlinePLUS

... him/her with a warm, solid shelter against wind. Make sure that they have unlimited access to ... the shelter should be positioned away from prevailing winds. Space heaters and heat lamps should be avoided ...

340

Rainy Weather Science.  

ERIC Educational Resources Information Center

Presents ideas on the use of rainy weather for activities in the earth, life, and physical sciences. Topics include formation and collision of raindrops, amount and distribution of rain, shedding of water by plants, mapping puddles and potholes, rainbow formation, stalking storms online, lightning, and comparing particles in the air before and…

Reynolds, Karen

1996-01-01

341

Weathering and mass wasting  

NSDL National Science Digital Library

This class exercise is an opportunity for students to apply textbook information about weathering and mass wasting to local and nationally-recognized surface features, such as Stone Mountain (GA), Half Dome (CA), and others. It also serves as an introduction to the use of Google Earth as an analytical tool for calculating distances, slopes, and evaluating landforms. Designed for a geomorphology course

Clayton, Jordan

342

Microbial Weathering of Olivine  

NASA Technical Reports Server (NTRS)

Controlled microbial weathering of olivine experiments displays a unique style of nanoetching caused by biofilm attachment to mineral surfaces. We are investigating whether the morphology of biotic nanoetching can be used as a biosignature. Additional information is contained in the original extended abstract.

McKay, D. S.; Longazo, T. G.; Wentworth, S. J.; Southam, G.

2002-01-01

343

Weathering the Double Whammy.  

ERIC Educational Resources Information Center

Discusses how governing boards can help their institutions weather the "double-whammy" of doing more with less: identify the institution's short-term and long-term challenges; refocus the institution's mission, planning, and programming; assess and integrate the institution's tuition, aid, and outreach strategies; redouble the institution's…

Wellman, Jane V.

2002-01-01

344

Rocks and Weathering  

NSDL National Science Digital Library

Sedimentary, igneous and metamorphic rocks, weathering, erosion and transport, and the rock cycle are explained in this resource for students through written content, interactive content, audio, video and games. A multiple choice test is included. Students may score their tests and the correct responses will be given.

345

Gulf of Maine: Weather  

NSDL National Science Digital Library

Lessons and activities from the Gulf of Maine Research Institute (formerly Gulf of Maine Aquarium), focused on hurricanes, El Nino, fog, and volcanic eruptions. Emphasis on important hurricanes of the past. Resources include lessons, guides for simple experiments, and a student weather network. Downloadable materials and additional webpages also provided.

2010-08-04

346

Weather and emotional state  

Microsoft Academic Search

Introduction Given the proven effects of weather on the human organism, an attempt to examine its effects on a psychic and emotional level has been made. Emotions affect the bio-tonus, working ability and concentration, hence their significance in various domains of economic life, such as health care, education, transportation, tourism, etc. Data and methods The research has been made in

Z. Spasova

2010-01-01

347

Weather Stations: Storms  

NSDL National Science Digital Library

In this activity, learners test how cornstarch and glitter in water move when disturbed. Learners compare their observations with videos of Jupiter's and Earth's storm movements. This activity is one station that can be combined with other stations for an hour and half lesson on weather patterns on Jupiter and Earth.

Institute, Lunar A.; Nasa

2011-01-01

348

Blogging About the Weather  

NSDL National Science Digital Library

Since the majority of the content standards related to weather focus on forecasting, elementary students often spend a lot of time studying cloud types, fronts, storms, and using a barometer to read air pressure. Although this allows students to "do" scie

Kyle Evans

2010-04-01

349

Weather and the Sky  

NSDL National Science Digital Library

This self-contained module on weather and objects in the sky includes a range of fun activities that students can perform in the classroom and at home with family members. They impart important concepts such as observation, identification, measurement, and differentiation.

Houghton Mifflin Science

350

Sunspots and Space Weather  

NSDL National Science Digital Library

This activity is part of Planet Diary and is an online investigation for students in how sunspots impact space weather between the Sun and Earth. Students research solar maximum and minimum as well as recent sunspot numbers to determine a connection between the numbers and solar activity. This page is accompanied by a page of websites for further resources.

351

METEOROLOGICAL Weather and Forecasting  

E-print Network

AMERICAN METEOROLOGICAL SOCIETY Weather and Forecasting EARLY ONLINE RELEASE This is a preliminary it is available. © 2010 American Meteorological Society #12;Generated using version 3.0 of the official AMS LATEX template Multidisciplinary Analysis of an Unusual Tornado: Meteorology,1 Climatology, and the Communication

352

Weather, Climate, and You.  

ERIC Educational Resources Information Center

Information from the American Institute of Medical Climatologists on human responses to weather and climatic conditions, including clouds, winds, humidity, barometric pressure, heat, cold, and other variables that may exert a pervasive impact on health, behavior, disposition, and the level of efficiency with which individuals function is reviewed.…

Blai, Boris, Jr.

353

Uncertain weather, uncertain climate  

E-print Network

Adventure of the Speckled Band" "Good-morning, madam," said Holmes cheerily. "My name is Sherlock Holmes, and then only when you sit on the left-hand side of the driver." #12;Holmes' calculation D. Nychka Uncertain of vehicle Maximize over vehicle #12;D. Nychka Uncertain weather, uncertain climate 8 Holmes' conclusion

Nychka, Douglas

354

Space Weather Action Center  

NSDL National Science Digital Library

The Space Weather Action Center is a computer-based activity that allows students to track, from their classroom, the development and progress of solar storms. The activity incorporates online NASA data and addresses national education standards in science, technology and math. Students rotate through four space weather learning stations and are challenged to answer the following questions: Do sunspot regions exist today that could be a source of solar storms?; Have radio signals been recorded today from a flare or coronal mass ejection that could affect Earth?; Has there been a measurable disturbance in the Earth's magnetic field?; and Have auroras been seen within the last 24 hours because of a solar storm? A setup guide is provided to show how to create a Space Weather Action Center in the classroom, including recommendations, diagrams, and the necessary list of materials. The instructional guide features background and evaluation materials, alignments to national standards, extension activities, and instructions on how to read, analyze and record space weather data.

355

Weather and Flight Testing  

NASA Technical Reports Server (NTRS)

This viewgraph document reviews some of the weather hazards involved with flight testing. Some of the hazards reviewed are: turbulence, icing, thunderstorms and winds and windshear. Maps, pictures, satellite pictures of the meteorological phenomena and graphs are included. Also included are pictures of damaged aircraft.

Wiley, Scott

2007-01-01

356

A reliable and hybrid multi-path routing protocol for multi-interface tactical ad hoc networks  

Microsoft Academic Search

Reliable communication in the tactical area networks is critical because successful exchange of tactical information plays a vital role in achievement of military missions. However, this is an extremely challenging task due to several detrimental factors, such as low signal strength, interference and jamming. To increase communication reliability in tactical ad hoc networks, a robust and adaptive routing protocol can

Sung-Won Lee; Ji Yong Choi; Keun Woo Lim; Young-Bae Ko; Byeong-Hee Roh

2010-01-01

357

When winter weather disrupts work.  

PubMed

Paul Beevers, of the BVA's legal helpline, explains the implications for employers of travel disruption resulting from bad weather and offers a few pointers on dealing with exceptional weather conditions. PMID:25556140

2015-01-01

358

External Resource: Erosion and Weathering  

NSDL National Science Digital Library

This is a Teachers' Domain photo essay with images that depict surface features on Earth that result from weathering and erosion, as well as measures designed to mitigate their unwanted effects. Topics: weathering, erosion, sediments, dunes, deltas, glaci

1900-01-01

359

Space Weather Impacts on Aviation  

NSDL National Science Digital Library

Space Weather Impacts on Aviation examines the effects of solar flares, coronal mass ejections, and other solar phenomena on aviation operations. The module builds on background science knowledge taught in the course prerequisite, Space Weather Basics, 2nd Edition. The content gives aviation forecasters and others an overview of the information and products available from NOAA's Space Weather Prediction Center and provides practice interpreting and using those products for decision support during space weather events.

Comet

2012-06-12

360

Real-Time Weather Data  

NSDL National Science Digital Library

This website provides real-time and forecast weather maps and data for the United States. The Satellite section contains satellite weather images from the GOES 8 and GOES 10 satellites, the Radar section contains radar weather images from NEXRAD radars, the Surface Data section contains plots of various weather conditions (temperatures, winds, pressure, precipitation), and the Upper Air section plots winds and temperatures across the United States.

361

Postcopulatory inbreeding avoidance in guppies.  

PubMed

In many species, the negative fitness effects of inbreeding have facilitated the evolution of a wide range of inbreeding avoidance mechanisms. Although avoidance mechanisms operating prior to mating are well documented, evidence for postcopulatory mechanisms of inbreeding avoidance remain scarce. Here, we examine the potential for paternity biases to favour unrelated males when their sperm compete for fertilizations though postcopulatory inbreeding avoidance mechanisms in the guppy, Poecilia reticulata. To test this possibility, we used a series of artificial inseminations to deliver an equal number of sperm from a related (either full sibling or half sibling) and unrelated male to a female while statistically controlling for differences in sperm quality between rival ejaculates. In this way, we were able to focus exclusively on postcopulatory mechanisms of inbreeding avoidance and account for differences in sperm competitiveness between rival males. Under these carefully controlled conditions, we report a significant bias in paternity towards unrelated males, although this effect was only apparent when the related male was a full sibling. We also show that sperm competition generally favours males with highly viable sperm and thus that some variance in sperm competitiveness can be attributed to difference in sperm quality. Our findings for postcopulatory inbreeding avoidance are consistent with prior work on guppies, revealing that sperm competition success declines linearly with the level of relatedness, but also that such effects are only apparent at relatedness levels of full siblings or higher. These findings reveal that postcopulatory processes alone can facilitate inbreeding avoidance. PMID:25387854

Fitzpatrick, J L; Evans, J P

2014-12-01

362

Road Weather and Transportation Systems  

E-print Network

Road Weather and Transportation Systems Rhonda Young, P.E., PhD Associate Professor Dept. of Civil & Arch. Engineering Portland State University April 18, 2014 #12;Engineering Perspective of Road Weather · How does weather impact transportation systems? · As engineers, is there anything we can do

Bertini, Robert L.

363

Spring Break-Weathering Homework  

NSDL National Science Digital Library

Students are asked to photograph something that shows either physical or chemical weathering. They must be in the photograph for purposes of scale. They must then write up their description of the weathering feature and explain the actual weathering processes. This assignment can also be expanded to include mass wasting and mass wasting prevention.

Farthing, Dori

364

Weather Forecasting for Radio Astronomy  

E-print Network

Weather Forecasting for Radio Astronomy Part I: The Mechanics and Physics Ronald J Maddalena August 1, 2008 #12;Outline Part I Background -- research inspirations and aspirations Vertical weather, .... Part II Results on refraction & air mass (with Jeff Paradis) Part III Results on opacity, weather

Groppi, Christopher

365

Science Sampler: Clever with weather  

NSDL National Science Digital Library

In eighth-grade Earth science at Louisville Middle School in Louisville, Colorado, students learn how large-scale weather patterns such as the jet stream and weather fronts interact to generate local weather conditions. The authors have developed a modeli

David Crowder

2011-02-01

366

Weather Fundamentals: Climate & Seasons. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes), describes weather patterns and cycles around the globe. The various types of climates around…

1998

367

Differences Between Climate and Weather  

NSDL National Science Digital Library

In this activity, students collect weather data over several days or weeks, graph temperature data, and compare the temperature data collected with long-term climate averages from where they live. Understanding the difference between weather and climate and interpreting local weather data are important first steps to understanding larger-scale global climate changes.

Research, National C.

368

Seasonal Extreme Weather Forecasts  

NSDL National Science Digital Library

Forecasts for UK winter gales and severe gales, North Atlantic and US landfalling hurricanes, Northwest Pacific and Far East landfalling typhoons, Southwest Pacific and Australian landfalling cyclones, and US Cooling Degree Days are available at this site from the Benfield Greig Hazard Research Centre at University College, London. Forecast summaries, descriptions of forecasting methodology, and graphics of historical and predicted events through time are presented in .pdf format for each weather subcategory. This site also tells users when the next predictions are to be released and has links to press releases and other extreme weather Websites. This is a good site for those interested in methods of climatology or those who want to prepare for that next big typhoon.

369

Human system integration considerations for tactical head-mounted displays  

NASA Astrophysics Data System (ADS)

As computer-use propagates across the battlefield, the necessity to effectively integrate such system components challenges the system developer to find a balance between added functionality and system usability. The most significant challenge is ruggedizing and integrating these technologies in an acceptable manner that does not impede the users' combat capability, but instead significantly enhances it . In this paper, researchers at the Air Force Research Laboratory's Battlespace Acoustics Branch explored alternative Head Mounted Display (HMD) concepts, investigating field of view as well as ease of use concerns. Special Operations personnel prosecute mission objectives in dynamic environments requiring an agile integration solution that is equally accommodating. This report describes the research process as well as the unique concerns and results of integrating tactical HMDs for special operation forces. Issues involving variable use-cases, as well as cable management are also addressed.

Burnett, Gregory M.; Hoover, Jeffery L.; Racine, Matthew S.; Sedillo, Michael R.

2010-04-01

370

[Surgical treatment tactics for acute varicothrombophlebitis atypical forms].  

PubMed

Changes of phlebohemodynamics under control of ultrasonographic investigation were registered in 237 patients, suffering an acute varicothrombophlebitis (AVTH) of superficial veins of lower extremities (LE). In 21 patients atypical forms of AVTH were revealed, including reflux toward a big subcutaneous vein (BSV) of the leg and/or small subcutaneous vein (SSV); reflux toward insufficient indirect veins on hip and shin; reflux toward insufficient direct perforant veins. For atypical forms of AVTH the urgent operations on hip and shin were performed: crossectomy, short or long stripping, phlebectomy and/or scleroobliteration of tributaries; open subfascial resection (mini-Linton); deferred operations: phlebectomy of the BSV/SSV tributaries, open scleroobliteration, subfascial resection (mini-Linton). Systematization of the AVTH forms in accordance to the LE segments have permitted to determine strategy and tactics of the patients treatment, what have important practical significance. PMID:25252552

Rusyn, V I; Riashko, M I; Sirchak, S S; Lopit, V M; Krasnopol's'ka, O S

2014-06-01

371

Multiple Application Propfan Study (MAPS): Advanced tactical transport  

NASA Technical Reports Server (NTRS)

This study was conducted to ascertain potential benefits of a propfan propulsion system application to a blended wing/body military tactical transport. Based on a design cruise Mach no. of 0.75 for the design mission, the results indicate a significant advantage in various figures of merit for the propfan over those of a comparable technology turbofan. Although the propfan has a 1.6 percent greater takeoff gross weight, its life cycle cost is 5.3 percent smaller, partly because of a 27 percent smaller specific fuel consumption. When employed on alternate missions, the propfan configuration offers significantly improved flexibility and capability: an increase in sea level penetration distance of more than 100 percent, or in time-on-station of 24 percent, or in deployment payload of 38 percent.

Newton, F. C.; Liebeck, R. H.; Mitchell, G. H.; Mooiweer, A.; Platte, M. M.; Toogood, T. L.; Wright, R. A.

1986-01-01

372

Repetition avoidance in human language  

E-print Network

Repetition is avoided in countless human languages and at a variety of grammatical levels. In this dissertation I ask what it is that makes repetition so bad. I propose that at least three distinct biases against repetition ...

Walter, Mary Ann, Ph. D. Massachusetts Institute of Technology

2007-01-01

373

Avoiding character collisions in games  

E-print Network

that solves this problem for situations with at least thirty characters. A program was written to test and demonstrate the method. This method might also contribute to the solution of collision avoidance problems in robotics....

Calderon, Manuel

2012-06-07

374

Weather Stations: Winds  

NSDL National Science Digital Library

In this activity, learners use a toaster to generate wind and compare the appliance's heat source to Jupiter's own hot interior. Learners discover that convection drives wind on Jupiter and on Earth. This activity is one station that can be combined with other stations for an hour and half lesson on weather patterns on Jupiter and Earth. For safety reasons, this activity should be facilitated by an adult or used as a demonstration only.

Institute, Lunar A.; Nasa

2011-01-01

375

National Weather Service Glossary  

NSDL National Science Digital Library

This glossary contains information on more than 2000 terms, phrases and abbreviations used by the National Weather Service (NWS). Many of these terms and abbreviations are used by NWS forecasters to communicate between each other and have been in use for many years; the glossary will aid users in better understanding NWS products. The glossary is searchable by keyword or browsable by letter of the alphabet.

376

Space Weathering of Lunar Rocks  

NASA Technical Reports Server (NTRS)

All materials exposed at the lunar surface undergo space weathering processes. On the Moon, boulders make up only a small percentage of the exposed surface, and areas where such rocks are exposed, like central peaks, are often among the least space weathered regions identified from remote sensing data. Yet space weathered surfaces (patina) are relatively common on returned rock samples, some of which directly sample the surface of larger boulders. Because, as witness plates to lunar space weathering, rocks and boulders experience longer exposure times compared to lunar soil grains, they allow us to develop a deeper perspective on the relative importance of various weathering processes as a function of time.

Noble, S. K.; Keller, L. P.; Christoffersen, R.; Rahman, Z.

2012-01-01

377

Fracture characteristics in weathered granites  

NASA Astrophysics Data System (ADS)

The variability of weathered materials is an important factor in the geotechnical characterization of rock for engineering purposes. Most engineering rock mass classifications include weathering schemes that separate the weathering profile into zones or grades that depend upon the engineering and geological properties of the rock. Many geotechnical characteristics, including weathering, are controlled by the density and arrangement of fractures within the rock, but the relationships between fracture patterns and weathering grades are typically not addressed. Fracture characteristics were investigated in 13 exposures in five study areas in weathered granite in eastern Asia. All weathering grades were present, but never in the same exposure. Two approaches were used to evaluate the field data: (1) joint spacings were tabulated and examined within each weathering grade (tabulated classification); and (2) each exposure was classified according to the dominant weathering grade (visual classification). Mean and median joint spacings and joint spacing frequency distributions were analyzed and compared statistically for each approach. The box fractal dimensions for joint spacing were calculated for exposures classified visually in each weathering grade. Three-dimensional models of fresh and weathered granite were also generated and sampled for comparison to the field data. Mean joint spacing is usually 25% or more closer in weathered granite than it is in fresh granite, and the difference between the mean spacings for weathered granite and fresh granite tend to be statistically significant. There are no significant differences between any distribution medians. The joint spacing distributions for weathered granite and fresh granite are also not statistically significantly different, and there are no significant differences among the joint spacing frequency distributions for the different grades of weathered granite. Fractal analysis of joint spacings, however, suggests spacing characteristics of fresh and slightly weathered (SW) granite are very different from those in moderately, highly, and completely weathered granite, and sampling of three-dimensional models for weathered and fresh granite supports this. In an engineering context, this suggests that joint spacing relationships in the various grades of weathered granite can be treated as the same regardless of weathering grade and that joint patterns in fresh granite must be evaluated separately. This knowledge could result in significant time and cost savings in the geotechnical characterization of these materials.

Ehlen, Judy

1999-12-01

378

Effects of lake warming on behavioural thermoregulatory tactics in a cold-water stenothermic fish.  

PubMed

Despite some evidence of within-population phenotypic variation in fish thermal behaviour, the occurrence of alternative tactics of this behaviour is rarely explicitly considered when studying natural populations. Brook charr provide an example of within-population variability in behavioural thermoregulation as revealed by a recent study on a lacustrine population of this species. The objectives of the present study were (i) to determine the influence of natural variability in the lake's thermal profiles on the expression of thermoregulatory tactics, and (ii) to determine the vertical and horizontal movements of individuals at different periods of the day to better understand the spatio-temporal behaviour associated with each thermoregulatory tactic. During summer 2010, 30 adult brook charr were equipped with thermo-sensitive radio transmitters to monitor their selected temperatures and daily movements. These individuals exhibited the same four behavioural thermoregulatory tactics observed in 2003 and 2005, but the expression of two of these was weaker in 2010. This result was associated with lake warming, which constrained the expression of two thermoregulatory tactics: brook charr significantly decreased their selected temperatures and daily movements when the mean daily epilimnion temperature was above 22.4°C. This study shows for the first time that the expression of behavioural thermoregulatory tactics is related to the lake's thermal regime and that the tactics are plastic through time. PMID:24663489

Goyer, Katerine; Bertolo, Andrea; Pépino, Marc; Magnan, Pierre

2014-01-01

379

Kazakhstan Space Weather Initiative  

NASA Astrophysics Data System (ADS)

Kazakhstan experimental complex is a center of experimental study of space weather. This complex is situated near Almaty, Kazakhstan and includes experimental setup for registration of cosmic ray intensity (neutron monitor) at altitude of 3340 m above sea level, geomagnetic observatory and setup for registration of solar flux density with frequency of 1 and 3 GHz with 1 second time resolution. Results of space environment monitoring in real time are accessible via Internet. This experimental information is used for space weather investigations and different cosmic ray effects. Almaty mountain cosmic ray station is one of the most suitable and sensitive stations for investigation and forecasting of the dangerous situations for satellites; for this reason Almaty cosmic ray station is included in the world-wide neutron monitor network for the real-time monitoring of the space weather conditions and European Database NMDB (www.nmdb.eu). All data are represented on the web-site of the Institute of Ionosphere (www.ionos.kz) in real time. Since July, 2006 the space environment prediction laboratory represents the forecast of geomagnetic activity every day on the same site (www.ionos.kz/?q=en/node/21).

Kryakunova, Olga

2012-07-01

380

Vision-based obstacle avoidance  

DOEpatents

A method for allowing a robot to avoid objects along a programmed path: first, a field of view for an electronic imager of the robot is established along a path where the electronic imager obtains the object location information within the field of view; second, a population coded control signal is then derived from the object location information and is transmitted to the robot; finally, the robot then responds to the control signal and avoids the detected object.

Galbraith, John (Los Alamos, NM)

2006-07-18

381

Predator Avoidance in Extremophile Fish  

PubMed Central

Extreme habitats are often characterized by reduced predation pressures, thus representing refuges for the inhabiting species. The present study was designed to investigate predator avoidance of extremophile populations of Poecilia mexicana and P. sulphuraria that either live in hydrogen sulfide-rich (sulfidic) springs or cave habitats, both of which are known to have impoverished piscine predator regimes. Focal fishes that inhabited sulfidic springs showed slightly weaker avoidance reactions when presented with several naturally occurring predatory cichlids, but strongest differences to populations from non-sulfidic habitats were found in a decreased shoaling tendency with non-predatory swordtail (Xiphophorus hellerii) females. When comparing avoidance reactions between P. mexicana from a sulfidic cave (Cueva del Azufre) and the adjacent sulfidic surface creek (El Azufre), we found only slight differences in predator avoidance, but surface fish reacted much more strongly to the non-predatory cichlid Vieja bifasciata. Our third experiment was designed to disentangle learned from innate effects of predator recognition. We compared laboratory-reared (i.e., predator-naïve) and wild-caught (i.e., predator-experienced) individuals of P. mexicana from a non-sulfidic river and found no differences in their reaction towards the presented predators. Overall, our results indicate (1) that predator avoidance is still functional in extremophile Poecilia spp. and (2) that predator recognition and avoidance reactions have a strong genetic basis. PMID:25371337

Bierbach, David; Schulte, Matthias; Herrmann, Nina; Zimmer, Claudia; Arias-Rodriguez, Lenin; Indy, Jeane Rimber; Riesch, Rüdiger; Plath, Martin

2013-01-01

382

Green Bank Weather Dana S. Balser  

E-print Network

Green Bank Weather Dana S. Balser #12;Weather Resources 1. Weather Stations 2. Weather Forecasts (NOAA/Maddalena) 3. Pyrgeometer 4. 86 GHz Tipping Radiometer 5. 12 GHz Interferometer #12;Weather Parameters 1 May 2004 to 1 March 2007 speedwindousInstantaneV :Hz)(12StationWeather e

Balser, Dana S.

383

ASSESSING THE RISK OF SALT WEATHERING IN SANDSTONE BY INSTRU-MENTED MONITORING OF THE ELECTRICAL IMPEDANCE  

E-print Network

ASSESSING THE RISK OF SALT WEATHERING IN SANDSTONE BY INSTRU- MENTED MONITORING OF THE ELECTRICAL, Pfaffenwaldring 2b, 70569 Stuttgart, Germany frank.lehmann@mpa.uni-stuttgart.de ABSTRACT Salt weathering of salts and salt mixtures within the material re- quires adequate measures to avoid further deterioration

Boyer, Edmond

384

Winter Weather: Hypothermia  

MedlinePLUS

... Children Safe From Drowning in Flooded Areas Avoiding Carbon Monoxide Poisoning During a Power Outage Driving Through Water After a Disaster Preventing Trench Foot or Immersion Foot Identification and Treatment of Hypothermia Related to Exposure While Working in Cold Water General Information about ...

385

Winter Weather: Frostbite  

MedlinePLUS

... Children Safe From Drowning in Flooded Areas Avoiding Carbon Monoxide Poisoning During a Power Outage Driving Through Water After a Disaster Preventing Trench Foot or Immersion Foot Identification and Treatment of Hypothermia Related to Exposure While Working in Cold Water General Information about ...

386

Fire Weather Products for Public and Emergency Use: Extending Professional Resources to the Public  

NASA Astrophysics Data System (ADS)

Large wildfires require significant resources to combat, including dedicated meteorological support to provide accurate and timely forecasts to assist incident commanders in making decisions for logistical and tactical firefighting operations. Smaller fires often require the same capabilities for understanding fire and the fire weather environment, but access to needed resources and tools is often limited due to technical, training, or education limitations. Providing fire weather information and training to incident commanders for smaller wildfires should prove to enhance firefighting capabilities and improve safety for both firefighters and for the public as well. One of the premier tools used to support fire weather forecasting for the largest wildfires is the FX-Net product, a thin-client version of the Advanced Weather Interactive Processing System used by NWS incident meteorologists (IMETs) deployed to large wildfires. We present results from an ongoing project to extend the sophisticated products available from FX-Net to more accessible and mobile software platforms, such as Google Earth. The project involves input from IMETs and fire commanders to identify the key parameters used in fighting wildfires, and involves a large training component for fire responders to utilize simplified products to improve understanding of fire weather in the context of firefighting operations.

Rogers, M. A.; Schranz, S.; Kriederman, L.

2012-12-01

387

Dynamic routing control in heterogeneous tactical networks with multiple traffic priorities  

NASA Astrophysics Data System (ADS)

To efficiently use alternate paths during periods of congestion, we have devised prioritized Dynamic Routing Control Agent (pDRCA) that (1) selects best links to meet the bandwidth and delay requirements of traffic, (2) provides load-balancing and traffic prioritization when multiple topologies are available, and (3) handles changes in link quality and traffic demand, and link outages. pDRCA provides multiplatform load balancing to maximize SATCOM (both P2P and multi-point) and airborne links utilization. It influences link selection by configuring the cost metrics on a router's interface, which does not require any changes to the routing protocol itself. It supports service differentiation of multiple traffic priorities by providing more network resources to the highest priority flows. pDRCA does so by solving an optimization problem to find optimal links weights that increase throughput and decrease E2E delay; avoid congested, low quality, and long delay links; and exploit path diversity in the network. These optimal link weights are sent to the local agents to be configured on individual routers per traffic priority. The pDRCA optimization algorithm has been proven effective in improving application performance. We created a variety of different test scenarios by varying traffic profile and link behavior (stable links, varying capacity, and link outages). In the scenarios where high priority traffic experienced significant loss without pDRCA, the average loss was reduced from 49.5% to 13% and in some cases dropped to 0%. Currently, pDRCA is integrated with an open-source software router and priority queues on Linux as a component of Open Tactical Router (OTR), which is being developed by ONR DTCN program.

Fecko, Mariusz A.; Wong, Larry; Kang, Jaewong; Cichocki, Andrzej; Kaul, Vikram; Samtani, Sunil

2012-05-01

388

Severe Weather Forecast Decision Aid  

NASA Technical Reports Server (NTRS)

This report presents a 15-year climatological study of severe weather events and related severe weather atmospheric parameters. Data sources included local forecast rules, archived sounding data, Cloud-to-Ground Lightning Surveillance System (CGLSS) data, surface and upper air maps, and two severe weather event databases covering east-central Florida. The local forecast rules were used to set threat assessment thresholds for stability parameters that were derived from the sounding data. The severe weather events databases were used to identify days with reported severe weather and the CGLSS data was used to differentiate between lightning and non-lightning days. These data sets provided the foundation for analyzing the stability parameters and synoptic patterns that were used to develop an objective tool to aid in forecasting severe weather events. The period of record for the analysis was May - September, 1989 - 2003. The results indicate that there are certain synoptic patterns more prevalent on days with severe weather and some of the stability parameters are better predictors of severe weather days based on locally tuned threat values. The results also revealed the stability parameters that did not display any skill related to severe weather days. An interactive web-based Severe Weather Decision Aid was developed to assist the duty forecaster by providing a level of objective guidance based on the analysis of the stability parameters, CGLSS data, and synoptic-scale dynamics. The tool will be tested and evaluated during the 2005 warm season.

Bauman, William H., III; Wheeler, Mark M.; Short, David A.

2005-01-01

389

Avoided cost standard under PURPA  

SciTech Connect

The Public Utility Regulatory Policies Act (PURPA) (P.L. 95-617) was passed to encourage electricity conservation through a variety of regulatory and rate reforms. Information is provided on the controversy surrounding the avoided cost standard established under PURPA. Promulgated by the Federal Energy Regulatory Committee (FERC) in February 1980, the avoided cost standard sets a minimum rate for utilities purchasing power from a qualified facility (QF) at the utilities full avoided cost. Recent court cases have challenged this standard and FERC is currently appealing to the Supreme Court. The impact of these court cases may have little effect on the actual rates set by state Public Utility Commissions (PUCs), which can require rates higher than the minimums established by FERC, since many PUCs appear in favor of requiring full avoided costs. The arguments for and against requiring utilities to pay full avoided costs come down to balancing between incentives for QFs on the one hand and fairness to utilities and their non-QF customers on the other.

Cole, R.J.; Holmlund, I.; Smith, S.A.; Williams, T.A.

1983-04-01

390

Automatic Collision Avoidance Technology (ACAT)  

NASA Technical Reports Server (NTRS)

This document represents two views of the Automatic Collision Avoidance Technology (ACAT). One viewgraph presentation reviews the development and system design of Automatic Collision Avoidance Technology (ACAT). Two types of ACAT exist: Automatic Ground Collision Avoidance (AGCAS) and Automatic Air Collision Avoidance (AACAS). The AGCAS Uses Digital Terrain Elevation Data (DTED) for mapping functions, and uses Navigation data to place aircraft on map. It then scans DTED in front of and around aircraft and uses future aircraft trajectory (5g) to provide automatic flyup maneuver when required. The AACAS uses data link to determine position and closing rate. It contains several canned maneuvers to avoid collision. Automatic maneuvers can occur at last instant and both aircraft maneuver when using data link. The system can use sensor in place of data link. The second viewgraph presentation reviews the development of a flight test and an evaluation of the test. A review of the operation and comparison of the AGCAS and a pilot's performance are given. The same review is given for the AACAS is given.

Swihart, Donald E.; Skoog, Mark A.

2007-01-01

391

Communicating and managing change during extreme weather events: promising practices for responding to urgent and emergent climate threats.  

PubMed

Large-scale weather events in the USA such as hurricanes Sandy, Isaac and Katrina challenge traditional approaches to change communication and management (CCM) before during and after crises. A major challenge (as well as opportunity) is addressing change from the 'whole-community' perspective affecting a spectrum of people, policies, processes, behaviours and outcomes. When CCM is used effectively, one of its fundamental advantages is creating a sense of urgency. This paper looks at optimising communication during extreme weather events, engaging stakeholders, harnessing the power of social media and change, and correlating organisational and individual behaviours and actions. The strategic blend of change management and crisis communication strategies and tactics in CCM is a central feature in the response to the full range of extreme weather scenarios. PMID:23835423

Tinker, Tim L

2013-01-01

392

Finding Space Weather Events  

NSDL National Science Digital Library

This is an activity about searching online data archives for solar wind events. Learners will find at least three episodes of increased solar wind activity impacting Earth using direct measurements of solar wind velocity and density. Then, they will characterize each events by its rise time, the time it takes for the solar wind speed to rise from normal levels to the peak speed of the event, and the percentage increase in solar wind velocity. This is Activity 11 of the Space Weather Forecast curriculum.

393

Weather Stations: Phase Change  

NSDL National Science Digital Library

In this activity, learners observe the water cycle in action! Water vapor in a tumbler condenses on chilled aluminum foil — producing the liquid form of water familiar to us as rain and dew. Learners discuss how Jupiter's lack of a surface simplifies its water cycle. Learners then consider the roles ammonia and ammonia compounds play in Jupiter's more complicated atmosphere. This activity is one station that can be combined with other stations for an hour and half lesson on weather patterns on Jupiter and Earth.

2014-07-11

394

Global Weather Patterns  

NSDL National Science Digital Library

This tutorial introduces students to global weather patterns and how they affect the kinds of trees and plants that grow in different latitudes of the Earth. The discussion covers the tropics and the lush rainforests that live there, temperate forests in the mid-latitudes, and boreal forests in the far north. There is also a description of how treeless areas occur in various climate zones (desert, tundra, savannah), and how plants adapt to low-water conditions in the desert. A quiz and glossary are included.

395

Weather Forecasting Aid  

NASA Technical Reports Server (NTRS)

Weather forecasters are usually very precise in reporting such conditions as temperature, wind velocity and humidity. They also provide exact information on barometric pressure at a given moment, and whether the barometer is "rising" or "falling"- but not how rapidly or how slowly it is rising or falling. Until now, there has not been available an instrument which measures precisely the current rate of change of barometric pressure. A meteorological instrument called a barograph traces the historical ups and downs of barometric pressure and plots a rising or falling curve, but, updated every three hours, it is only momentarily accurate at each updating.

1979-01-01

396

Tactical Combat Casualty Care in the Canadian Forces: lessons learned from the Afghan war  

PubMed Central

Tactical Combat Casualty Care (TCCC) is intended to treat potentially preventable causes of death on the battlefield, but acknowledges that application of these treatments may place the provider and even the mission in jeopardy if performed at the wrong time. Therefore, TCCC classifies the tactical situation with respect to health care provision into 3 phases (care under fire, tactical field care and tactical evacuation) and only permits certain interventions to be performed in specific phases based on the danger to the provider and casualty. In the 6 years that the Canadian Forces (CF) have been involved in sustained combat operations in Kandahar, Afghanistan, more than 1000 CF members have been injured and more than 150 have been killed. As a result, the CF gained substantial experience delivering TCCC to wounded soldiers on the battlefield. The purpose of this paper is to review the principles of TCCC and some of the lessons learned about battlefield trauma care during this conflict. PMID:22099324

Savage, Erin; Forestier, Colleen; Withers, Nicholas; Tien, Homer; Pannell, Dylan

2011-01-01

397

Coorientational Accuracy and Organizational Conflict: An Examination of Tactic Selection and Discussion Satisfaction.  

ERIC Educational Resources Information Center

Examines the relationship between coorientational accuracy (CA) and two dimensions of conflict (tactic selection and interaction satisfaction). Indicates that CA has an impact on interactants' levels of discussion satisfaction. (JK)

Papa, Michael J.; Pood, Elliott A.

1988-01-01

398

Tactics for Reasoning modulo AC in Coq Thomas Braibant and Damien Pous  

E-print Network

Tactics for Reasoning modulo AC in Coq Thomas Braibant and Damien Pous LIG, UMR 5217, CNRS, INRIA. Second, while reading such a proof script is easy, writing it can be painful: there are several sequences

399

A Tactic for Rewriting modulo AC in Coq Thomas Braibant and Damien Pous  

E-print Network

A Tactic for Rewriting modulo AC in Coq Thomas Braibant and Damien Pous LIG, UMR 5217, CNRS ­ INRIA. The former is painful: one has to figure out what is the proper sequence of rewrites to do. In this case

400

Stochastic Inventory Management for Tactical Process Planning under Uncertainties: MINLP Models and Algorithms  

E-print Network

Stochastic Inventory Management for Tactical Process Planning under Uncertainties: MINLP Models complexes with integration of stochastic inventory management under supply and demand uncertainty. By using-pooling" effects to allow centralization of inventory management for chemicals that are consumed

Grossmann, Ignacio E.

401

Advanced Strategic and Tactical Relay Request Management for the Mars Relay Operations Service  

NASA Technical Reports Server (NTRS)

This software provides a new set of capabilities for the Mars Relay Operations Service (MaROS) in support of Strategic and Tactical relay, including a highly interactive relay request Web user interface, mission control over relay planning time periods, and mission management of allowed strategic vs. tactical request parameters. Together, these new capabilities expand the scope of the system to include all elements critical for Tactical relay operations. Planning of replay activities spans a time period that is split into two distinct phases. The first phase is called Strategic, which begins at the time that relay opportunities are identified, and concludes at the point that the orbiter generates the flight sequences for on board execution. Any relay request changes from this point on are called Tactical. Tactical requests, otherwise called Orbit - er Relay State Changes (ORSC), are highly restricted in terms of what types of changes can be made, and the types of parameters that can be changed may differ from one orbiter to the next. For example, one orbiter may be able to delay the start of a relay request, while another may not. The legacy approach to ORSC management involves exchanges of e-mail with "requests for change" and "acknowledgement of approval," with no other tracking of changes outside of e-mail folders. MaROS Phases 1 and 2 provided the infrastructure for strategic relay for all supported missions. This new version, 3.0, introduces several capabilities that fully expand the scope of the system to include tactical relay. One new feature allows orbiter users to manage and "lock" Planning Periods, which allows the orbiter team to formalize the changeover from Strategic to Tactical operations. Another major feature allows users to interactively submit tactical request changes via a Web user interface. A third new feature allows orbiter missions to specify allowed tactical updates, which are automatically incorporated into the tactical change process. This software update is significant in that it provides the only centralized service for tactical request management available for relay missions.

Allard, Daniel A.; Wallick, Michael N.; Gladden, Roy E.; Wang, Paul; Hy, Franklin H.

2013-01-01

402

Case-Studies of Decision Support Models for Collaboration in Tactical Mobile Environments  

Microsoft Academic Search

The paper addresses experimental studies of decision support models for collaboration in tactical network-centric operations. This project, supported by partners from Lawrence Livermore National Laboratory (LLNL), US Special Operations Command (SOCOM), Swedish Armed Forces, Austria, and Singapore. Naval Postgraduate Schools (NPS) Tactical Network Topology (TNT) is the base for the testbed, comprised of long-haul OFDM networks combined with self-forming wireless

Alex Bordetsky; Henrik Friman

403

Employee resistance to organizational change: managerial influence tactics and leader-member exchange.  

PubMed

The authors explored the relationship between managerial influence tactics and employee resistance to organizational change. Using attribution theory, the authors developed a series of hypotheses concerning the effects of influence tactics on employee resistance to change and the ways in which these relationships are moderated by leader-member exchange. Results, which are based on multisource data, suggest that employee resistance reflects both the type of influence a manager uses and the strength of leader-member exchange. PMID:18361644

Furst, Stacie A; Cable, Daniel M

2008-03-01

404

Rise and fall of a tactic: the ram in nineteenth century naval doctrine  

E-print Network

RISE AND FALL OF A TACTIC: THE RAM IN NINETEENTH CENTURY NAVAL DOCTRINE A Thesis by ROBERT LEROY JOHNSON II Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...? son ( ~&ember) J. Richard St (Member) L rry D. Hill (He d of Department) December 1989 ABSTRACT Rise and Fall of a Tactic: The Ram in Nineteenth Century Naval Doctrine. (December 1989) Robert Leroy Johnson II, B. A. , Kansas State University...

Johnson, Robert Leroy

1989-01-01

405

Tacticity control of polypropylene using a C2-symmetric family of catalysts  

E-print Network

TACTICITY CONTROL OF POLYPROPYLENE USING A C2-SYMMETRIC FAMILY OF CATALYSTS A Thesis by NATHAN PRENTICE RIFE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2007 Major Subject: Chemistry #1; TACTICITY CONTROL OF POLYPROPYLENE USING A C2-SYMMETRIC FAMILY OF CATALYSTS A Thesis by NATHAN PRENTICE RIFE Submitted...

Rife, Nathan Prentice

2009-05-15

406

Make Your Own Weather Station  

NSDL National Science Digital Library

In this OLogy activity, kids learn about climate and atmospheric conditions by making their own weather station. The activity begins with an overview that explains that weather happens in the atmosphere, where conditions are always changing. Students are given step-by-step, illustrated directions to make a wind vane, a rain gauge and a barometer. The activity includes a printable Weather Chart and wind vane cutouts.

407

Science Sampler: Weathering database technology  

NSDL National Science Digital Library

Collecting weather data is a traditional part of a meteorology unit at the middle level, but making connections between the data and weather conditions can be a challenge for students. One way to help students make these connections clearer is to enter the data into a database. This allows students to quickly compare different fields of data and recognize which readings are associated with certain types of weather.

Robert Snyder

2005-02-01

408

47 CFR 74.604 - Interference avoidance.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Interference avoidance. 74.604 Section 74...Broadcast Auxiliary Stations § 74.604 Interference avoidance. (a) [Reserved] ...as may be necessary to avoid mutual interference, including consultation...

2013-10-01

409

47 CFR 74.604 - Interference avoidance.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Interference avoidance. 74.604 Section 74...Broadcast Auxiliary Stations § 74.604 Interference avoidance. (a) [Reserved] ...as may be necessary to avoid mutual interference, including consultation...

2012-10-01

410

47 CFR 74.604 - Interference avoidance.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Interference avoidance. 74.604 Section 74...Broadcast Auxiliary Stations § 74.604 Interference avoidance. (a) [Reserved] ...as may be necessary to avoid mutual interference, including consultation...

2010-10-01

411

47 CFR 74.604 - Interference avoidance.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 2014-10-01 false Interference avoidance. 74.604 Section 74...Broadcast Auxiliary Stations § 74.604 Interference avoidance. (a) [Reserved] ...as may be necessary to avoid mutual interference, including consultation...

2014-10-01

412

47 CFR 74.604 - Interference avoidance.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Interference avoidance. 74.604 Section 74...Broadcast Auxiliary Stations § 74.604 Interference avoidance. (a) [Reserved] ...as may be necessary to avoid mutual interference, including consultation...

2011-10-01

413

Vodcasting Space Weather  

NASA Astrophysics Data System (ADS)

The topic of space weather is the subject of a series of vodcasts (video podcasts) produced by MIT Haystack Observatory (Westford, MA) and Loch Ness Productions (Groton, MA). This paper discusses the production and distribution of the series via Webcast, Youtube, and other avenues. It also presents preliminary evaluation of the effectiveness and outreach of the project through feedback from both formal and information education venues. The vodcast series is linked to the NASA Living With a Star Targeted Research and Technology project award "Multi-Instrument Investigation of Inner-Magnetospheric/Ionosphere Disturbances.” It is being carried out by Principal Investigator Dr. John Foster, under the auspices of NASA Grant # NNX06AB86G. The research involves using ionospheric total electron content (TEC) observations to study the location, extent, and duration of perturbations within stormtime ionospheric electric fields at mid- to low latitudes. It combines ground-based global positioning system (GPS) TEC data, incoherent scatter radar measurements of the mid-latitude ionospheric state, and DMSP satellite observations to characterize conditions which lead to severe low-latitude ionospheric perturbations. Each vodcast episode covers a certain aspect of space weather and the research program.

Collins Petersen, Carolyn; Erickson, P. J.; Needles, M.

2009-01-01

414

Weathering of rock 'Ginger'  

NASA Technical Reports Server (NTRS)

One of the more unusual rocks at the site is Ginger, located southeast of the lander. Parts of it have the reddest color of any material in view, whereas its rounded lobes are gray and relatively unweathered. These color differences are brought out in the inset, enhanced at the upper right. In the false color image at the lower right, the shape of the visible-wavelength spectrum (related to the abundance of weathered ferric iron minerals) is indicated by the hue of the rocks. Blue indicates relatively unweathered rocks. Typical soils and drift, which are heavily weathered, are shown in green and flesh tones. The very red color in the creases in the rock surface correspond to a crust of ferric minerals. The origin of the rock is uncertain; the ferric crust may have grown underneath the rock, or it may cement pebbles together into a conglomerate. Ginger will be a target of future super-resolution studies to better constrain its origin.

Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. The Imager for Mars Pathfinder (IMP) was developed by the University of Arizona Lunar and Planetary Laboratory under contract to JPL. Peter Smith is the Principal Investigator. JPL is an operating division of the California Institute of Technology (Caltech).

1997-01-01

415

Online Mate-Retention Tactics on Facebook Are Associated With Relationship Aggression.  

PubMed

A measure of Facebook-related mate-retention tactics was developed to investigate the relationship between online behaviors and intimate partner aggression. One hundred and seventy-seven young adults (65 men, 112 women) completed questionnaires that included measures of online and offline mate-retention tactics, Facebook jealousy, Facebook surveillance, and intimate partner violence. A factor analysis yielded four subscales for the Facebook Mate-Retention Tactic Inventory (FMRTI): Care and Affection, Jealousy and Surveillance, Possession Signals, and Punishment of Infidelity Threat. The FMRTI total scores were positively correlated with Facebook jealousy, Facebook surveillance, and use of offline mate-retention tactics. The Jealousy and Surveillance subscale uniquely predicted intimate partner psychological and physical aggression over and above existing measures. Facebook mate-retention tactics fully mediated the relation between Facebook jealousy and both intimate partner psychological and physical aggression. The current study provides preliminary evidence for conceptualizing Facebook as an environment for the use of mate-retention tactics that have real-life implications for intimate partner violence. PMID:25339609

Brem, Meagan J; Spiller, Laura C; Vandehey, Michael A

2014-10-22

416

Space Weathering: An Ultraviolet Indicator  

NASA Technical Reports Server (NTRS)

We present evidence suggesting that the spectral slope of airless bodies in the UV-visible wavelength range can be used as an indicator of exposure to space weathering. While space weathering generally produces a reddening of spectra in the visible-NIR spectral regions, it tends to result in a bluing of the UV-visible portion of the spectrum, and may in some cases produce a spectral reversal. The bluing effect may be detectable with smaller amounts of weathering than are necessary to detect the longer-wavelength weathering effects.

Hendrix, A. R.; Vilas, F.

2004-01-01

417

Space Weathering: An Ultraviolet Indicator  

NASA Technical Reports Server (NTRS)

We present evidence suggesting that the spectral slope of airless bodies in the UV-visible wavelength range can be used as an indicator of exposure to space weathering. While space weathering generally produces a reddening of spectra in the visible-NIR spectral regions, it tends to result in a bluing of the UV-visible portion of the spectrum, and may in some cases produce a spectral reversal. The bluing effect may be detectable with smaller amounts of weathering than are necessary to detect the longer-wavelength weathering effects.

Hendrix, A. R.; Vilas, F.

2003-01-01

418

AWE: Aviation Weather Data Visualization  

NASA Technical Reports Server (NTRS)

The two official sources for aviation weather reports both require the pilot to mentally visualize the provided information. In contrast, our system, Aviation Weather Environment (AWE) presents aviation specific weather available to pilots in an easy to visualize form. We start with a computer-generated textual briefing for a specific area. We map this briefing onto a grid specific to the pilot's route that includes only information relevant to his flight route that includes only information relevant to his flight as defined by route, altitude, true airspeed, and proposed departure time. By modifying various parameters, the pilot can use AWE as a planning tool as well as a weather briefing tool.

Spirkovska, Lilly; Lodha, Suresh K.

2001-01-01

419

Aging in Utah: Avoid Crisis  

E-print Network

Aging in Utah: Avoid Crisis Maximize Opportunity UTAH COMMISSION ON AGING Annual Report 2010-2011 #12;Page 1Utah Commission on Aging 2010-2011 Interim Report The Commission's statutory purpose is to: a. increase public and government understanding of the current and future needs of the state's aging

Tipple, Brett

420

Biochar aging reduces earthworm avoidance  

Technology Transfer Automated Retrieval System (TEKTRAN)

Biochar, a black carbon substance produced by the pyrolysis of organic feedstocks, has been used in many soil improvement strategies ranging from nutrient addition to sequestration of C. Simple toxicity studies and laboratory preference/avoidance assays are recommended but results rarely reported. ...

421

Transuranic waste minimization and avoidance  

Microsoft Academic Search

This paper assesses the effectiveness of existing, planned and proposed waste avoidance and minimization projects in reducing the amount of Los Alamos National Laboratory (LANL) Transuranic (TRU) waste requiring disposal at the Waste Isolation Pilot Plant (WIPP). The majority of the TRU wastes generated at LANL are associated with the Stockpile Stewardship and Management Program, the Milliwatt Heat Source Program,

R. L. Dodge; A. J. Montoya

2001-01-01

422

Contamination avoidance detector test suite  

Microsoft Academic Search

Contamination avoidancerefers to the military doctrine of avoiding or minimizing the effects of Chemical and Biological (CB) threats. The location, identification and tracking of CB hazards are also major concern for Homeland CB defense. Several advanced detector systems for both chemical and biological threats are being developed for the Armed Services. Current test equipment and methodologies are inadequate for the

Arthur R. Maret; Lorraine C. Castillo; Eddie Meadows; Lyman W. Condie

2003-01-01

423

Tobacco industry tactics for resisting public policy on health.  

PubMed Central

The tactics used by the tobacco industry to resist government regulation of its products include conducting public relations campaigns, buying scientific and other expertise to create controversy about established facts, funding political parties, hiring lobbyists to influence policy, using front groups and allied industries to oppose tobacco control measures, pre-empting strong legislation by pressing for the adoption of voluntary codes or weaker laws, and corrupting public officials. Formerly secret internal tobacco industry documents provide evidence of a 50-year conspiracy to "resist smoking restrictions, restore smoker confidence and preserve product liability defence". The documents reveal industry-wide collusion on legal, political and socially important issues to the tobacco industry and clearly demonstrate that the industry is not disposed to act ethically or responsibly. Societal action is therefore required to ensure that the public health takes precedence over corporate profits. Recommendations for reducing the political influence of the tobacco industry include the following. Every tobacco company in every market should publicly disclose what it knew about the addictiveness and harm caused by tobacco, when it obtained this information, and what it did about it. The industry should be required to guarantee internationally recognized basic consumer rights to its customers. Trade associations and other industry groupings established to deceive the public should be disbanded. These recommendations should be incorporated into WHO's Framework Convention on Tobacco Control. PMID:10994263

Saloojee, Y.; Dagli, E.

2000-01-01

424

Decision support using the Multistatic Tactical Planning Aid (MSTPA)  

NASA Astrophysics Data System (ADS)

The Multistatic Tactical Planning Aid (MSTPA) is a tool currently in development at NATO Undersea Research Centre which may be used to model the performance of a given multistatic sensor network in terms of the probability of detection of a submarine, the ability to hold a track and whether such a track could be correctly classified as such. The tool therefore considers the entire chain of events from an initial calculation of signal excess, the generation of a contact considering localisation errors, followed by the subsequent tracking and classification process. In its current form, the tool may be used to plan a particular multistatic scenario through operational analysis of many Monte Carlo simulations. The future development of MSTPA will transition towards a real-time decision support tool to assist operators and planners at sea. This study introduces a number of generic decision support techniques which may be wrapped around the MSTPA tool. The acoustic performance metric that will drive decisions will of course be subject to uncertainty relating to environmental measurements and extrapolations. The effect of this uncertainty on acoustic performance is examined here. Future studies will consider the sensitivity of the eventual decision—in terms of optimum sensor positions—to the acoustic uncertainty.

Strode, Christopher; Mourre, Baptiste; Rixen, Michel

2012-01-01

425

Proactive and adaptive reconfiguration for reliable communication in tactical networks  

NASA Astrophysics Data System (ADS)

Due to the layer-independency design, in current wireless networks, only after a complete failure occurs in one of the involved layers, is the next higher layer notified, and by then performance degradation may already be observed. Also, the new connection establishment process has to go through all the layers. It is time-consuming and usually results in an extra latency and resource unavailability within the transition region, which in turn leads to inefficient bandwidth usage and a poor user experience. Moreover, the root-cause of the connection termination is typically hidden, and not utilized for the repair or reestablishment. To mitigate the problem, in this paper, we propose a proactive and adaptive cross-layer reconfiguration (PACR) scheme for reliable communication in tactical networks. The PACR scheme allows the user (e.g., network operator) to adaptively reconfigure operating parameters in the corresponding layers through proactive prediction, root-cause identification, and cross-layer negotiations. The core of the PACR scheme is an integrated crosslayer information sharing architecture that expedites information exchange and inter-layer interactions between different network layers in a proactive manner. Through simulation and experiments, it has been shown that our proposed PACR scheme can significantly improve the network performance, and facilitate the nodes or users to make smart decisions accordingly in an adaptive manner.

Zeng, Hui; Kwak, Kyung Joon; Deng, Julia; Fu, Bo; Xiao, Yang; Jeski, John

2012-05-01

426

Individual combatant simulator for tactics training and mission rehearsal  

NASA Astrophysics Data System (ADS)

This individual combatant simulator (ICS) provides ground force leaders opportunities to practice tactical skills on the simulated battlefield by directing dismounted computer- generated forces in combatant and non-combatant exercises. Integrated hardware and software systems allow leaders to operate on the simulated battlefield as they would on the physical battlefield using combinations of voice commands, arm signals, virtual tools, and virtual weapons. Hardware components include image generator, head-mounted display, 3D sound, spatial tracking, instrumented glove, synthesized speech, and voice recognition systems. The training simulator can be operated on a network. Four types of evaluations, including performance of authentic tasks and subjective evaluations, were conducted using dismounted infantry soldiers and university students as participants. The results indicated that the ICS was easy to learn and use, could be used to conduct training exercises, supported skillful performance in training exercises, and was engaging and compelling for the users. These initial evaluations indicated ease of learning and use of the simulator, as well as the potential for training effectiveness.

Nemire, Kenneth

1998-04-01

427

Terminal - Tactical Separation Assured Flight Environment (T-TSafe)  

NASA Technical Reports Server (NTRS)

The Tactical Separation Assured Flight Environment (TSAFE) has been previously tested as a conflict detection and resolution tool in the en-route phase of flight. Fast time simulations of a terminal version of this tool called Terminal TSAFE (T-TSAFE) have shown promise over the current conflict detection tools. It has shown to have fewer false alerts (as low as 2 per hour) and better prediction to conflict time than Conflict Alert. The tool will be tested in the simulated terminal area of Los Angeles International Airport, in a Human-in-the-loop experiment to identify controller procedures and information requirements. The simulation will include comparisons of T-TSAFE with NASA's version of Conflict Alert. Also, some other variables such as altitude entry by the controller, which improve T-TSAFE's predictions for conflict detection, will be tested. T-TSAFE integrates features of current conflict detection tools such as Automated Terminal Proximity Alert used to alleviate compression errors in the final approach phase. Based on fast-time simulation analysis, the anticipated benefits of T-TSAFE over Conflict Alert include reduced false/missed alerts and increased time to predicted loss of separation. Other metrics that will be used to evaluate the tool's impact on the controller include controller intervention, workload, and situation awareness.

Verma, Savita Arora; Tang, Huabin; Ballinger, Debbi

2011-01-01

428

National Severe Storms Laboratory's Weather Room  

NSDL National Science Digital Library

This educational website from NOAA has: facts on tornadoes, hurricanes, lightning and thunderstorms; lessons on weather symbols, maps and systems; an extensive list of weather and climate resources for teachers; information on careers in weather; and a list of weather links including weather data. Additionally, the site includes all the latest meteorological research including tornado genesis and lightning.

2010-08-06

429

How Do Meteorologists Forecast the Weather?  

NSDL National Science Digital Library

This is a lesson that I developed where students learn how meteorologists predict the weather. Students will use surface weather maps, radar, satellite, and weather models from the National Weather Service to assess the current state of the weather and make a prediction.

David Faysash

2012-07-30

430

Space Weather Action Center  

NSDL National Science Digital Library

This is a revised "Tracking a Solar Storm-Student Observation Network" with a new format and Web site. The Space Weather Action Center (SWAC) allows students to use near real time data and track a solar storm. By following the basic steps in the Instructional Guide students can access, analyze and record NASA satellite and observatory data. There is a downloadable 'step-by-step' Educator's Setup Guide where you will find a variety of recommendations and diagrams detailing how to construct a fully functional SWAC while keeping potential limitations on space and technology in mind. Flip charts provide the step by step data use and there are also instructions for using green screen technology.

2009-01-01

431

Severe Weather: Hurricanes  

NSDL National Science Digital Library

Severe Weather: Hurricanes is part of an on-line series of modules entitled Exploring the Environment. Emphasizing an integrated approach to environmental Earth Science education through problem-based learning, this module asks student groups to track an actual (past) hurricane. Background information explains how hurricanes occur, how they are named, and the Saffir-Simpson Intensity Scale. Activities train groups on how to track hurricanes. Once they are given an actual hurricane to track, students must determine the speed of its movement and where it will come ashore. There are extension activities, a glossary of terms, teacher resources, a reference for the problem-based learning model, and links to additional resources.

432

Supporting Weather Data  

NASA Technical Reports Server (NTRS)

Since its founding in 1992, Global Science & Technology, Inc. (GST), of Greenbelt, Maryland, has been developing technologies and providing services in support of NASA scientific research. GST specialties include scientific analysis, science data and information systems, data visualization, communications, networking and Web technologies, computer science, and software system engineering. As a longtime contractor to Goddard Space Flight Center s Earth Science Directorate, GST scientific, engineering, and information technology staff have extensive qualifications with the synthesis of satellite, in situ, and Earth science data for weather- and climate-related projects. GST s experience in this arena is end-to-end, from building satellite ground receiving systems and science data systems, to product generation and research and analysis.

2004-01-01

433

The Weather Calculator  

NSDL National Science Digital Library

This collection of resources, provided by the National Weather Service Forecast Office for the El Paso area, allows users to be their own meteorologists. For example, armed with data such as current temperature, humidity, and windspeed, users may calculate the heat index or wind chill. Using the resources on this page, and providing basic meteorological data such as temperature, air pressure, and dew point, users can calculate such things as the vapor pressure, maxing ratio, or density altitude. This site also provides unit conversion calculators, allowing users to convert temperatures, air pressures, and wind speeds into various units. For some of the conversions, this site presumes its users to have an understanding of meteorological terms and to be able to read basic meteorological instruments.

1969-12-31

434

Micro Weather Station  

NASA Technical Reports Server (NTRS)

Improved in situ meteorological measurements in the troposphere and stratosphere are needed for studies of weather and climate, both as a primary data source and as validation for remote sensing instruments. Following the initial development and successful flight validation of the surface acoustic wave (SAW) hygrometer, the micro weather station program was directed toward the development of an integrated instrument, capable of accurate, in situ profiling of the troposphere, and small enough to fly on a radiosonde balloon for direct comparison with standard radiosondes. On April 23, 1998, working with Frank Schmidlin and Bob Olson of Wallops Island Flight Facility, we flew our instrument in a dual payload experiment, for validation and direct comparison with a Vaisala radiosonde. During that flight, the SAW dewpoint hygrometer measured frostpoint down to -76T at 44,000 feet. Using a laptop computer in radio contact with the balloon, we monitored data in real time, issued the cutdown command, and recovered the payload less than an hour after landing in White Sands Missile Range, 50 miles from the launch site in Hatch, New Mexico. Future flights will extend the intercomparison, and attempt to obtain in situ meteorological profiles from the surface through the tropopause. The SAW hygrometer was successfully deployed on the NASA DC8 as part of NASA's Third Convection and Moisture Experiment (CAMEX-3) during August and September, 1998. This field campaign was devoted to the study of hurricane tracking and intensification using NASA-funded aircraft. In situ humidity data from the SAW hygrometer are currently being analyzed and compared with data from other instruments on the DC8 and ER2 aircraft. Additional information is contained in the original.

Hoenk, Michael E.

1999-01-01

435

Principles of Numerical Weather Prediction  

NSDL National Science Digital Library

This undergraduate meteorology tutorial uses a narrative format to discuss the strengths and limitations of computer weather forecasting models and aids students in recognizing when they will have problems. Students are expected to grasp the importance of initial conditions and of model resolution in a numerical weather forecast.

Nielsen-Gammon, John

1996-01-01

436

Rocks, Weathering, and Erosional Landscapes  

NSDL National Science Digital Library

Students will identify principal rock forming silicate minerals and distinguish their relative stability when exposed to weathering; identify sedimentary, igneous and metamorphic rocks and deduce the relative resistance based on mineral composition and texture;and finally relate erosional landscapes to the differential weathering and erosion of rocks of varying strengths. Designed for a geomorphology course

Hanson, Lindley

437

Make Your Own Weather Station  

NSDL National Science Digital Library

Become an amateur meteorologist by building your own weather station and keeping a record of your measurements. Older students can independently follow instructions on how to build five different instruments (barometer, hygrometer, rain gauge, weather vane, and compass). Younger students will need adult supervision with hammer and nails.

438

CSA Weatherization Demonstration Project Plan  

Microsoft Academic Search

This report comprises the plan of a research and demonstration effort to determine the fraction of energy that may be saved by installing weatherization retrofits in poor peoples' homes throughout the United States. Two broad groups of weatherization retrofits are considered for application in each dwelling: (1) 'architectural,' those affecting the building shell; and (2) 'mechanical,' those affecting space heating

R. Crenshaw; R. Clark; R. Chapman; R. Grot; M. Godette

1979-01-01

439

Regional-seasonal weather forecasting  

SciTech Connect

In the interest of allocating heating fuels optimally, the state-of-the-art for seasonal weather forecasting is reviewed. A model using an enormous data base of past weather data is contemplated to improve seasonal forecasts, but present skills do not make that practicable. 90 references. (PSB)

Abarbanel, H.; Foley, H.; MacDonald, G.; Rothaus, O.; Rudermann, M.; Vesecky, J.

1980-08-01

440

Weather Fundamentals: Rain & Snow. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series, for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes) gives concise explanations of the various types of precipitation and describes how the water…

1998

441

Doing Something About the Weather.  

ERIC Educational Resources Information Center

Describes an exercise that familiarizes students with the language of German weather reports, so that they will know what kinds of information to listen for. The exercise also helps students expand their vocabulary. The article includes transcriptions of actual German weather reports. (SED)

James, Charles J.

1986-01-01

442

Useful Weather Links Nolan Doesken  

E-print Network

forecasts · http://www.co.nrcs.usda.gov/snow/index.html #12;#12;USGS River Gauge Network · http, Kansas http://www.weather.gov/gld NWS Forecast Offices for Colorado #12;NWS NOAA Weather Radio · http on "River Status" and "River Forecasts" #12;NWS Precipitation Estimation http

443

Weather Fundamentals: Hurricanes & Tornadoes. [Videotape].  

ERIC Educational Resources Information Center

The videos in this educational series, for grades 4-7, help students understand the science behind weather phenomena through dramatic live-action footage, vivid animated graphics, detailed weather maps, and hands-on experiments. This episode (23 minutes) features information on the deadliest and most destructive storms on Earth. Through satellite…

1998

444

Space weather effects and commerical airlines  

NASA Astrophysics Data System (ADS)

Space Weather (SW) phenomena can effect many areas of commercial airline operations including avionics, communications and GPS navigation systems. Of particular importance at present is the recently introduced EU legislation requiring the monitoring of aircrew radiation exposure, including any variations at aircraft altitudes due to solar activity. The Mullard Space Science Laboratory is collaborating with Virgin Atlantic Airways, the Civil Aviation Authority and the National Physical Laboratory on a 3- year project to monitor the levels of cosmic radiation on long-haul flights. The study will determine whether computer models currently used to predict radiation exposure of aircrew are adequate. It also aims to determine whether solar or geomagnetic activity can cause significant modifications to the doses. This presentation will begin by showing some of the preliminary results obtained so far. As an example, we present a comparison of flight doses measured following the 14t h July 2000 X - class flare that was accompanied by a major Solar Particle Event (SPE). The results highlight the importance of a range of external factors that can strongly influence how SPEs may effect the measured dose at aircraft altitudes. At present, any SPE contributions in the airlines' dose records can only be poorly estimated retrospectively. Ideally, it would be better to try to avoid operating during these possibly significant radiation - enhancing events by utilising SW information (alerts, warnings, etc.). However, doing so poses many difficult operational problems for such a heavily regulated international industry, in terms of safety, security and procedures. Therefore, the use of timely SW information, which is still very unreliable, in a similar manner to terrestrial weather will require agreement from the International Civil Aviation Organisation (ICAO) and International Air Transport Association (IATA) to Air Traffic Control and Aviation Regulatory Authority's. This presentation will, therefore, conclude by summarising some of the identified key issues, which must be addressed, with the help of the science community, if the airlines want to benefit from the availability of Space Weather Services.

Jones, J.; Bentley, R.; Hunter, R.; Taylor, G.; Thomas, D.

445

Cool Stars and Space Weather  

E-print Network

Stellar flares, winds and coronal mass ejections form the space weather. They are signatures of the magnetic activity of cool stars and, since activity varies with age, mass and rotation, the space weather that extra-solar planets experience can be very different from the one encountered by the solar system planets. How do stellar activity and magnetism influence the space weather of exoplanets orbiting main-sequence stars? How do the environments surrounding exoplanets differ from those around the planets in our own solar system? How can the detailed knowledge acquired by the solar system community be applied in exoplanetary systems? How does space weather affect habitability? These were questions that were addressed in the splinter session "Cool stars and Space Weather", that took place on 9 Jun 2014, during the Cool Stars 18 meeting. In this paper, we present a summary of the contributions made to this session.

Vidotto, A A; Cameron, A C; Morin, J; Villadsen, J; Saar, S; Alvarado, J; Cohen, O; Holzwarth, V; Poppenhaeger, K; Reville, V

2014-01-01

446

Smooth Sailing for Weather Forecasting  

NASA Technical Reports Server (NTRS)

Through a cooperative venture with NASA's Stennis Space Center, WorldWinds, Inc., developed a unique weather and wave vector map using space-based radar satellite information and traditional weather observations. Called WorldWinds, the product provides accurate, near real-time, high-resolution weather forecasts. It was developed for commercial and scientific users. In addition to weather forecasting, the product's applications include maritime and terrestrial transportation, aviation operations, precision farming, offshore oil and gas operations, and coastal hazard response support. Target commercial markets include the operational maritime and aviation communities, oil and gas providers, and recreational yachting interests. Science applications include global long-term prediction and climate change, land-cover and land-use change, and natural hazard issues. Commercial airlines have expressed interest in the product, as it can provide forecasts over remote areas. WorldWinds, Inc., is currently providing its product to commercial weather outlets.

2002-01-01

447

Advocacy Tactics Found to Differ by Families' Class  

ERIC Educational Resources Information Center

If it's the squeaky wheel that gets the grease, middle-class children are more likely than their lower-income peers to grow up learning how to make the gears of the education system turn smoothly. Working-class parents, meanwhile, tend to raise their children to avoid conflict and be self-sufficient in problem-solving, an Indiana University…

Sparks, Sarah D.

2012-01-01

448

PV powering a weather station for severe weather  

SciTech Connect

A natural disaster, such as Hurricane Andrew, destroys thousands of homes and businesses. The destruction from this storm left thousands of people without communications, potable water, and electrical power. This prompted the Florida Solar Energy Center to study the application of solar electric power for use in disasters. During this same period, volunteers at the Tropical Prediction Center at the National Hurricane Center (NHC), Miami, Florida and the Miami Office of the National Weather Service (NWS) were working to increase the quantity and quality of observations received from home weather stations. Forecasters at NHC have found surface reports from home weather stations a valuable tool in determining the size, strength and course of hurricanes. Home weather stations appear able to record the required information with an adequate level of accuracy. Amateur radio, utilizing the Automatic Packet Report System, (APRS) can be used to transmit this data to weather service offices in virtually real time. Many weather data collecting stations are at remote sites which are not readily serviced by dependable commercial power. Photovoltaic (solar electric) modules generate electricity and when connected to a battery can operate as a stand alone power system. The integration of these components provides an inexpensive standalone system. The system is easy to install, operates automatically and has good communication capabilities. This paper discusses the design criteria, operation, construction and deployment of a prototype solar powered weather station.

Young, W. Jr. [Florida Solar Energy Center, Cocoa, FL (United States); Schmidt, J. [Joe Schmidt, Inc., Miami, FL (United States)

1997-12-31

449

Avoidance achievement motivation: A personal goals analysis  

Microsoft Academic Search

The present research investigated one antecedent and various consequences of pursuing avoidance personal achievement goals over the course of a semester. The authors assessed participants' achieve- ment-relevant goals using the newly devised Achievement Goals Questionnaire. The motive to avoid failure, assessed with self-report and projective measures, was established as an antecedent of avoid- ance goal pursuit. Avoidance regulation was shown

Andrew J. Elliot; Kennon M. Sheldon

1997-01-01

450

The Lab: Avoiding Research Misconduct  

NSDL National Science Digital Library

An interactive movie about a case of research misconduct where the viewer can become one of four lead characters - a graduate student, postdoctoral researcher, principal investigator, or research investigator - and make decisions about research integrity. The topics covered in this interactive scenario include avoiding research misconduct, mentorship responsibilities, handling of data, responsible authorship, and questionable research practices. A facilitator's guide is included in conjunction with this interactive movie.

2011-02-18

451

Avoiding congestion in recommender systems  

NASA Astrophysics Data System (ADS)

Recommender systems use the historical activities and personal profiles of users to uncover their preferences and recommend objects. Most of the previous methods are based on objects’ (and/or users’) similarity rather than on their difference. Such approaches are subject to a high risk of increasingly exposing users to a narrowing band of popular objects. As a result, a few objects may be recommended to an enormous number of users, resulting in the problem of recommendation congestion, which is to be avoided, especially when the recommended objects are limited resources. In order to quantitatively measure a recommendation algorithm's ability to avoid congestion, we proposed a new metric inspired by the Gini index, which is used to measure the inequality of the individual wealth distribution in an economy. Besides this, a new recommendation method called directed weighted conduction (DWC) was developed by considering the heat conduction process on a user-object bipartite network with different thermal conductivities. Experimental results obtained for three benchmark data sets showed that the DWC algorithm can effectively avoid system congestion, and greatly improve the novelty and diversity, while retaining relatively high accuracy, in comparison with the state-of-the-art methods.

Ren, Xiaolong; Lü, Linyuan; Liu, Runran; Zhang, Jianlin

2014-06-01

452

Alternatives to carbamate and organophosphate insecticides, cultural tactics, and ecological factors that affect Tomato spotted wilt virus epidemics in peanut.  

E-print Network

??Selected management tactics, including insecticides and cultural practices, against Frankliniella fusca (Hinds) and Tomato spotted wilt virus (TSWV) in peanut were evaluated. Effects of pine… (more)

Marasigan, Kathleen Monfero

2014-01-01

453

RESIDENTIAL WEATHERIZATION SPECIFICATIONS August 30, 2011  

E-print Network

RESIDENTIAL WEATHERIZATION SPECIFICATIONS August 30, 2011 Index to Sections Section Page I. GENERAL .................................................................................................2 III. GENERAL WEATHERIZATION REQUIREMENTS-fit) weatherization for electrically heated single family homes, manufactured homes, and multi-family buildings

454

Probabilistic Weather Forecasting for Winter Road Maintenance  

E-print Network

Probabilistic Weather Forecasting for Winter Road Maintenance Veronica J. Berrocal, Adrian E are needed. Currently, anti-icing decisions are usually based on deterministic weather forecasts. However. Starting with deterministic numerical weather predictions, they produce a joint predictive probability dis

Washington at Seattle, University of

455

49 CFR 195.224 - Welding: Weather.  

Code of Federal Regulations, 2012 CFR

... 3 2012-10-01 2012-10-01 false Welding: Weather. 195.224 Section 195.224 Transportation...LIQUIDS BY PIPELINE Construction § 195.224 Welding: Weather. Welding must be protected from weather conditions that...

2012-10-01

456

49 CFR 195.224 - Welding: Weather.  

Code of Federal Regulations, 2011 CFR

... 3 2011-10-01 2011-10-01 false Welding: Weather. 195.224 Section 195.224 Transportation...LIQUIDS BY PIPELINE Construction § 195.224 Welding: Weather. Welding must be protected from weather conditions that...

2011-10-01

457

49 CFR 195.224 - Welding: Weather.  

Code of Federal Regulations, 2013 CFR

... 3 2013-10-01 2013-10-01 false Welding: Weather. 195.224 Section 195.224 Transportation...LIQUIDS BY PIPELINE Construction § 195.224 Welding: Weather. Welding must be protected from weather conditions that...

2013-10-01

458

Lightning injuries in sports: situations to avoid.  

PubMed

There is no absolute protection against lightning because of its random and capricious nature. However, the risk of being struck by lightning can be substantially reduced. There are general safety rules that apply to all athletic and recreational events. The athlete should have a proactive plan that can be instituted when storms approach. He/she should go to a safe shelter before the storm arrives and stay there until the danger is gone. Because the location, climate, terrain and playing site vary with different sporting activities, safety plans may have distinct elements for different recreational activities. Mountain climbers should know the weather patterns of their locale. The highest frequency of lightning strikes in the Rocky Mountains occurs between 11 am and 9 pm during the months of April to September. There is less chance of a hiker encountering lightning during the early morning hours. Many tourists are unaware of this pattern, which may possibly explain the finding that most lightning victims are visitors from other states. The bicyclist is as vulnerable as anyone in the open. In the event of lightning he/she should seek safe shelter and get off the bike. Rubber tires do not provide protection from lightning. Golfers continue to make the same mistakes year after year. Golfers should know to seek safe shelter (clubhouse or closed metal vehicle) before the storm arrives and not return prematurely to the golf course. They should avoid isolated trees, open fields, unsafe sheds and metal poles. They should separate from each other rather than gather together. Swimmers should get out of the pool and find a safe shelter. Safe areas do not include poolsides, under awnings or under trees. A nearby closed automobile may be the safest place until the danger is gone. Applying precautions when engaging in these sporting or recreational activities will help to minimise the risk of casualties or fatalities caused by lightning. PMID:11310549

Cherington, M

2001-01-01

459

Scalable sensor management for automated fusion and tactical reconnaissance  

NASA Astrophysics Data System (ADS)

The capabilities of tactical intelligence, surveillance, and reconnaissance (ISR) payloads are expanding from single sensor imagers to integrated systems-of-systems architectures. Increasingly, these systems-of-systems include multiple sensing modalities that can act as force multipliers for the intelligence analyst. Currently, the separate sensing modalities operate largely independent of one another, providing a selection of operating modes but not an integrated intelligence product. We describe here a Sensor Management System (SMS) designed to provide a small, compact processing unit capable of managing multiple collaborative sensor systems on-board an aircraft. Its purpose is to increase sensor cooperation and collaboration to achieve intelligent data collection and exploitation. The SMS architecture is designed to be largely sensor and data agnostic and provide flexible networked access for both data providers and data consumers. It supports pre-planned and ad-hoc missions, with provisions for on-demand tasking and updates from users connected via data links. Management of sensors and user agents takes place over standard network protocols such that any number and combination of sensors and user agents, either on the local network or connected via data link, can register with the SMS at any time during the mission. The SMS provides control over sensor data collection to handle logging and routing of data products to subscribing user agents. It also supports the addition of algorithmic data processing agents for feature/target extraction and provides for subsequent cueing from one sensor to another. The SMS architecture was designed to scale from a small UAV carrying a limited number of payloads to an aircraft carrying a large number of payloads. The SMS system is STANAG 4575 compliant as a removable memory module (RMM) and can act as a vehicle specific module (VSM) to provide STANAG 4586 compliance (level-3 interoperability) to a non-compliant sensor system. The SMS architecture will be described and results from several flight tests and simulations will be shown.

Walls, Thomas J.; Wilson, Michael L.; Partridge, Darin C.; Haws, Jonathan R.; Jensen, Mark D.; Johnson, Troy R.; Petersen, Brad D.; Sullivan, Stephanie W.

2013-05-01

460

Condor TAC: EO/IR tactical aerial reconnaissance photography system  

NASA Astrophysics Data System (ADS)

Based on the experience gained with the Condor2 long-range oblique photography (LOROP) camera, ELOP is expanding its airborne reconnaissance product line with the Condor TAC tactical photography system. The latter was designed for overflight imaging of extended areas from a fighter or special mission aircraft, at day and night. The Condor TAC is mounted in an aerodynamically shaped pod and can operate in wide envelope of flight altitude and speed. Besides the camera, the pod contains mission management and video processing unit (MVU), solid state recorder (SSR), wide-band data link (DL) for real-time imagery transmission, and two environmental control units (ECU). Complex multi-segment optical windows were successfully developed for the system. The camera system design is modular and highly flexible. Two independent imaging payload modules are mounted inside a gimbal system. Each of the modules is equipped with a strap-down IMU, and may carry a cluster of cameras or a single large camera with gross weight up to 35 kg. The payload modules are interchangeable, with an identical interface to the gimbal. The modularity and open architecture of the system facilitate its adaptation to various operational requirements, as well as allow easy and relatively non-expensive upgrades and configuration changes. In the current configuration, both EO and IR payload modules are equipped with a combination of longer focal length cameras for bi-directional panoramic scan at medium and high flight altitudes, and shorter focal length cameras for fixed wide angle coverage at low altitudes. All the camera types are equipped with standard format, off-the-shelf area detector arrays. Precise motion compensation is achieved by calibrated back-scan mirrors.

Petrushevsky, Vladimir; Tsur, David

2012-06-01

461

SOAR telescope status and tactics for assembly/integration/validation  

NASA Astrophysics Data System (ADS)

Development of the SOAR telescope is currently underway. Project plans include many tactics for smooth assembly, integration, and validation of this new facility to be located on Cerro Pachon at the Cerro Tololo Inter-American Observatory in Chile. A small project team has been established to manage and engineer the development of the major subsystems that are combined in this high image quality 4.2-meter diameter telescope. The status and plans for the development of the 28m telescope are discussed. A modest-sized facility building is under construction by CTIO, the organization appointed to operate the facility for the SOAR partners. Each telescope subsystem is contracted on a firm fixed price basis and will include complete performance testing at the contractor's facility before acceptance and shipment to the site. To ensure seamless integration, representatives of each contractor will come to the site for assembly and testing in place. They join personnel from the Project Office, the new operations staff, and the CTIO maintenance organization to form integrated product teams for subsystem integration, SOAR eases integration by using and mandating common, commercial control software. The contractors, the SOAR team, and the instrument buildings are making extensive use of LabVIEW/BridgeVIEW running under Linux (with real-time extensions as necessary) on compactPCI chassis. The telescope will include sufficient instrumentation, including a possible adaptive optics system, to allow system testing and optimization. An exceptionally large instrument payload ensures that instruments can remain in place upon the telescope as they are delivered and brought on line.

Krabbendam, Victor L.; Sebring, Thomas A.

2000-08-01

462

Compute the Weather in Your Classroom.  

ERIC Educational Resources Information Center

Discusses a weather prediction activity connecting local weather network by computer modem. Describes software for telecommunications, data gathering, preparation work, and instructional procedures. (YP)

Meier, Beverly

1988-01-01

463

Bioeconomic synergy between tactics for insect eradication in the presence of Allee effects  

PubMed Central

Preventing the establishment of invading pest species can be beneficial with respect to averting future environmental and economic impacts and also in preventing the accumulation of control costs. Allee effects play an important role in the dynamics of newly established, low-density populations by driving small populations into self-extinction, making Allee effects critical in influencing outcomes of eradication efforts. We consider interactions between management tactics in the presence of Allee effects to determine cost-effective and time-efficient combinations to achieve eradication by developing a model that considers pesticide application, predator augmentation and mating disruption as control tactics, using the gypsy moth as a case study. Our findings indicate that given a range of constant expenditure levels, applying moderate levels of pesticides in conjunction with mating disruption increases the Allee threshold which simultaneously substantially decreases the time to eradication relative to either tactic alone. In contrast, increasing predation in conjunction with other tactics requires larger economic expenditures to achieve similar outcomes for the use of pesticide application or mating disruption alone. These results demonstrate the beneficial synergy that may arise from nonlinearities associated with the simultaneous application of multiple eradication tactics and offer new prospects for preventing the establishment of damaging non-native species. PMID:22438497

Blackwood, Julie C.; Berec, Ludek; Yamanaka, Takehiko; Epanchin-Niell, Rebecca S.; Hastings, Alan; Liebhold, Andrew M.

2012-01-01

464

Bioeconomic synergy between tactics for insect eradication in the presence of Allee effects.  

PubMed

Preventing the establishment of invading pest species can be beneficial with respect to averting future environmental and economic impacts and also in preventing the accumulation of control costs. Allee effects play an important role in the dynamics of newly established, low-density populations by driving small populations into self-extinction, making Allee effects critical in influencing outcomes of eradication efforts. We consider interactions between management tactics in the presence of Allee effects to determine cost-effective and time-efficient combinations to achieve eradication by developing a model that considers pesticide application, predator augmentation and mating disruption as control tactics, using the gypsy moth as a case study. Our findings indicate that given a range of constant expenditure levels, applying moderate levels of pesticides in conjunction with mating disruption increases the Allee threshold which simultaneously substantially decreases the time to eradication relative to either tactic alone. In contrast, increasing predation in conjunction with other tactics requires larger economic expenditures to achieve similar outcomes for the use of pesticide application or mating disruption alone. These results demonstrate the beneficial synergy that may arise from nonlinearities associated with the simultaneous application of multiple eradication tactics and offer new prospects for preventing the establishment of damaging non-native species. PMID:22438497

Blackwood, Julie C; Berec, Ludek; Yamanaka, Takehiko; Epanchin-Niell, Rebecca S; Hastings, Alan; Liebhold, Andrew M

2012-07-22

465

Space Weather Forecasting: An Enigma  

NASA Astrophysics Data System (ADS)

The space age began in earnest on October 4, 1957 with the launch of Sputnik 1 and was fuelled for over a decade by very strong national societal concerns. Prior to this single event the adverse effects of space weather had been registered on telegraph lines as well as interference on early WWII radar systems, while for countless eons the beauty of space weather as mid-latitude auroral displays were much appreciated. These prior space weather impacts were in themselves only a low-level science puzzle pursued by a few dedicated researchers. The technology boost and innovation that the post Sputnik era generated has almost single handedly defined our present day societal technology infrastructure. During the decade following Neil's walk on the moon on July 21, 1969 an international thrust to understand the science of space, and its weather, was in progress. However, the search for scientific understand was parsed into independent "stove pipe" categories: The ionosphere-aeronomy, the magnetosphere, the heliosphere-sun. The present day scientific infrastructure of funding agencies, learned societies, and international organizations are still hampered by these 1960's logical divisions which today are outdated in the pursuit of understanding space weather. As this era of intensive and well funded scientific research progressed so did societies innovative uses for space technologies and space "spin-offs". Well over a decade ago leaders in technology, science, and the military realized that there was indeed an adverse side to space weather that with each passing year became more severe. In 1994 several U.S. agencies established the National Space Weather Program (NSWP) to focus scientific attention on the system wide issue of the adverse effects of space weather on society and its technologies. Indeed for the past two decades a significant fraction of the scientific community has actively engaged in understanding space weather and hence crossing the "stove-pipe" disciplines. The perceived progress in space weather understanding differs significantly depending upon which community (scientific, technology, forecaster, society) is addressing the question. Even more divergent are these thoughts when the question is how valuable is the scientific capability of forecasting space weather. This talk will discuss present day as well as future potential for forecasting space weather for a few selected examples. The author will attempt to straddle the divergent community opinions.

Sojka, J. J.

2012-12-01

466

Differences Between Climate and Weather  

NSDL National Science Digital Library

This activity will provide students with first hand knowledge of local weather changes and how they relates to local climates. After this activity students will understand the general distinctions between weather and climate, that daily weather measurements are highly variable compared to long-term climate data, and appreciate the difficulty of identifying climate trends based on limited data. The instructor guide contains detailed background material, learning goals, alignment to national standards, grade level/time, details on materials and preparation, procedure, assessment ideas, and modifications for alternative learners.

467

Writing TAFS for Winter Weather  

NSDL National Science Digital Library

"Writing TAFs for Winter Weather" is the fourth unit in the Distance Learning Aviation Course 2 (DLAC2) series on producing TAFs that meet the needs of the aviation community. In addition to providing information about tools for diagnosing winter weather and its related impacts, the module extends the Practically Perfect TAF (PPTAF) process to address an airportâs operational thresholds. By understanding the thresholds at airports for which they produce TAFs, forecasters will be better able to produce a PPTAF. The unit also examines how to communicate effectively the logic and uncertainty using the aviation forecast discussion (AvnFD) and addresses maintaining an effective TAF weather watch and updating the TAF proactively.

Comet

2009-09-22

468

Stormy weather in galaxy clusters  

PubMed

Recent x-ray, optical, and radio observations coupled with particle and gas dynamics numerical simulations reveal an unexpectedly complex environment within clusters of galaxies, driven by ongoing accretion of matter from large-scale supercluster filaments. Mergers between clusters and continuous infall of dark matter and baryons from the cluster periphery produce long-lived "stormy weather" within the gaseous cluster atmosphere-shocks, turbulence, and winds of more than 1000 kilometers per second. This weather may be responsible for shaping a rich variety of extended radio sources, which in turn act as "barometers" and "anemometers" of cluster weather. PMID:9545210

Burns

1998-04-17

469

Recruiting "Friends of Medical Progress": Evolving Tactics in the Defense of Animal Experimentation, 1910s and 1920s.  

PubMed

In 1923, Thomas Barbour of Harvard announced the creation of a national lay organization, the Society of Friends of Medical Progress (FMP), to defend animal research in the United States against a resurgent antivivisection movement. After decades of successful behind-the-scenes lobbying and avoiding the public spotlight, medical scientists significantly altered their tactics and sought public engagement, at least by proxy. Although the authority of scientific medicine was rising, women's suffrage, the advent of the ballot initiative, and a growing alliance of antivivisectionists and other groups in opposition to allopathic medicine so altered the political landscape that medical scientists reconsidered formerly rejected ideas such partnering with laymen. Medical scientists, Walter B. Cannon and Simon Flexner chief among them, hoped that the FMP would relieve the scientists of a time-consuming burden and defend against government regulation of medical institutions without the charge of material self-interest. However, financial problems and the frequent conflicts that arose between the lay leadership and Flexner eventually undermined the FMP's value as a defender of animal experimentation and reveal the distrust of reformers like Flexner who did not believe that laymen could speak for scientific medicine. PMID:24957068

Ross, Karen D

2014-06-22

470

Tactics for managing the sorghum webworm in sorghum  

E-print Network

and blooming befoie June 20 at Corpus Christi and sorghum planted by April 10 and blooming before July 1 at College Station should avoid damaging populations of the sorghum web- worm. There was positive correlation between panicle char- acteristic ratings... and criticisms in preparing this manuscript. The cooperation of the personnel at the Texas Agri- cultural Experiment Station at Corpus Christi and Beeville is appreciated. Special acknowledgement is extended to Mr. L. Reyes. Special thanks are extended to Dr...

Hobbs, Johnny Ray

1978-01-01

471

Experiential avoidance in body dysmorphic disorder.  

PubMed

Experiential avoidance (i.e., the attempt to avoid certain internal experiences including bodily sensations, thoughts, emotions, memories, and urges) has been studied in various psychological disorders. However, research examining experiential avoidance in individuals with body dysmorphic disorder (BDD) is limited and inconsistent. The present study compared experiential avoidance in individuals with primary BDD (n=23) to healthy controls (n=22). Standardized measures were used to assess baseline clinical characteristics as well as experiential avoidance. Compared to healthy controls, individuals with BDD presented with significantly greater experiential avoidance (p<.001, d=-2.51). In BDD, experiential avoidance was positively correlated with depressive symptoms (p<.01) and avoidant coping strategies (p<.01). Clinician sensitivity to experiential avoidance may serve to improve the course of treatment for BDD. PMID:25010929

Wilson, Anne C; Wilhelm, Sabine; Hartmann, Andrea S

2014-09-01

472

How to Avoid Potential Pitfalls  

NSDL National Science Digital Library

Information at this site will help teachers to avoid potential pitfalls when teaching evolution. It will help teachers to understand why they should use function not purpose, evidence not proof, and why they should refer to accepting what the evidence shows rather than believing in evolution. There are also cautions about when to use the terms 'primitive/advanced' and 'theory/hypothesis'. Other potentially confusing terms include 'randomness in evolution' and 'ancestor/relative'. The meaning of adapt and the differentiation between evolution and development are also cited as potential problems. The site also offers examples of student activities that may mislead or give the wrong impression.

2007-12-12

473

SWPC: Current Space Weather Conditions  

NSDL National Science Digital Library

This site from the NOAA/NWS Space Weather Prediction Center provides alerts and warnings to the nation and the world for disturbances that can affect people and equipment working in space and on Earth.

2004-01-12

474

Snowslip Mountain Weather Station, MT  

USGS Multimedia Gallery

USGS Physical Scientist Erich Peitzsch sets up a weather station on Snowslip Mountain in Glacier National Park.  It provides meteorological data for avalanche forecasting and research, including wind speed and direction, air temperature, relative humidity, and net radiation measurements....

475

Physical Weathering Concept Map Exercise  

NSDL National Science Digital Library

Students review and score a concept map for physical weathering using a grading rubric. They are then asked to reorganize or redraw the diagram to a form that you believe is appropriate to earn the highest score on the rubric.

Mcconnell, David

476

Space Weathering Processes on Mercury  

NASA Technical Reports Server (NTRS)

Like the Moon, Mercury has no atmosphere to protect it from the harsh space environment and therefore it is expected that it will incur the effects of space weathering. These weathering processes are capable of both creating regolith and altering its optical properties. However, there are many important differences between the environments of Mercury and the Moon. These environmental differences will almost certainly affect the weathering processes as well as the products of those processes. It should be possible to observe the effects of these differences in Vis/NIR spectra of the type expected to be returned by MESSENGER. More importantly, understanding these weathering processes and their consequences is essential for evaluating the spectral data returned from MESSENGER and other missions in order to determine the mineralogy and the iron content of the Mercurian surface. Theoretical and experimental work has been undertaken in order to better understand these consequences.

Noble, S. K.; Pieters, C. M.

2002-01-01

477

Practical Weathering for Geology Students.  

ERIC Educational Resources Information Center

The design and data management of an activity to study weathering by increasing the rate of mineral dissolution in a microwave oven is described. Data analysis in terms of parabolic and first-order kinetics is discussed. (CW)

Hodder, A. Peter

1990-01-01

478

FAWN: Florida Automated Weather Network  

NSDL National Science Digital Library

The Florida Automated Weather Network (FAWN) provides up-to-date weather information through a system of automated weather stations distributed throughout the State of Florida. Research scientists at the University of Florida work closely with extension agents to monitor the FAWN system and make sure it provides fast, reliable, and convenient access. Overall, there are four parts to the FAWN system: collecting data, transmitting it to the collection site, processing the data, and redistributing it to the end user. FAWN database servers maintained by IFAS Information Technologies receive weather data about the date and time of collection, the air temperature, soil temperature, relative humidity, dewpoint, rainfall, wind direction, wind speed, and radiation from remote stations every 15 minutes. The information is processed and made available almost instantaneously through several different search methods accessible through FAWN web server, as well as an interactive voice-response system.

479

Honeycomb Weathering of Limestone Formations  

USGS Multimedia Gallery

Honeycomb weathering of sandstone located on the shores of Puget Sound occurs when expanding salt crystals break fragments of rock, creating a small hole that becomes larger as the process repeats itself over time....

480

Exercising Safely in Hot Weather  

MedlinePLUS

... older adults and people with health problems. Being hot for too long can cause hyperthermia—a heat- ... those who want to be active when it’s hot outside: l Check the weather forecast. If it’s ...

481

Dealing with Cold Weather Injuries  

MedlinePLUS

... this page, please enable JavaScript. Dealing With Cold Weather Injuries Safety precautions can prevent serious problems during ... clothing should be removed and replaced with warm, dry clothes or blankets. People with hypothermia should also ...

482

Tactics and Economics of Wildlife Oral Rabies Vaccination, Canada and the United States  

PubMed Central

Progressive elimination of rabies in wildlife has been a general strategy in Canada and the United States; common campaign tactics are trap–vaccinate–release (TVR), point infection control (PIC), and oral rabies vaccination (ORV). TVR and PIC are labor intensive and the most expensive tactics per unit area (?$616/km2 [in 2008 Can$, converted from the reported $450/km2 in 1991 Can$] and ?$612/km2 [$500/km2 in 1999 Can$], respectively), but these tactics have proven crucial to elimination of raccoon rabies in Canada and to maintenance of ORV zones for preventing the spread of raccoon rabies in the United States. Economic assessments have shown that during rabies epizootics, costs of human postexposure prophylaxis, pet vaccination, public health, and animal control spike. Modeling studies, involving diverse assumptions, have shown that ORV programs can be cost-efficient and yield benefit:cost ratios >1.0. PMID:19757549

Meltzer, Martin I.; Shwiff, Stephanie A.; Slate, Dennis

2009-01-01

483

Marine Tactical Command and Control System (MTACCS) Field Development System-1 (FDS-1) assessment: Final report  

SciTech Connect

The United State Marine Corps (USMC) is continuing the development and fielding of the Marine Corps Tactical Command and Control System (MTACCS), a system which exists in varying states of development, fielding, or modernization. MTACCS is currently composed of the following components: Tactical Combat Operations System (TCO) for ground command and control (C2), Intelligence Analysis System (IAS) with a Genser terminal connected to a TCO workstation for intelligence C2, Marine Integrated Personnel System (MIPS) and a TCO workstation using the Marine Combat Personnel System (MCPERS) software for personnel C2, Marine Integrated Logistics System (MILOGS) which is composed of the Landing Force Asset Distribution System (LFADS), the Marine Air-Ground Task Force (MAGTF) II, and a TCO terminal using the Marine Combat Logistics System (MCLOG) for logistics C2, Marine Corps Fire Support System (MCFSS) for fire support C2, and Advanced Tactical Air Command Central (ATACC) and the Improved Direct Air Support Central for aviation C2.

Avery, L.W.; Hunt, S.T.; Savage, S.F. (Pacific Northwest Lab., Richland, WA (United States)); McLaughlin, P.D.; Shepdard, A.P.; Worl, J.C. (Battelle Seattle Research Center, WA (United States))

1992-04-01

484

Obstacle-avoiding navigation system  

DOEpatents

A system for guiding an autonomous or semi-autonomous vehicle through a field of operation having obstacles thereon to be avoided employs a memory for containing data which defines an array of grid cells which correspond to respective subfields in the field of operation of the vehicle. Each grid cell in the memory contains a value which is indicative of the likelihood, or probability, that an obstacle is present in the respectively associated subfield. The values in the grid cells are incremented individually in response to each scan of the subfields, and precomputation and use of a look-up table avoids complex trigonometric functions. A further array of grid cells is fixed with respect to the vehicle form a conceptual active window which overlies the incremented grid cells. Thus, when the cells in the active window overly grid cell having values which are indicative of the presence of obstacles, the value therein is used as a multiplier of the precomputed vectorial values. The resulting plurality of vectorial values are summed vectorially in one embodiment of the invention to produce a virtual composite repulsive vector which is then summed vectorially with a target-directed vector for producing a resultant vector for guiding the vehicle. In an alternative embodiment, a plurality of vectors surrounding the vehicle are computed, each having a value corresponding to obstacle density. In such an embodiment, target location information is used to select between alternative directions of travel having low associated obstacle densities.

Borenstein, Johann (Ann Arbor, MI); Koren, Yoram (Ann Arbor, MI); Levine, Simon P. (Ann Arbor, MI)

1991-01-01

485

Contamination avoidance detector test suite  

NASA Astrophysics Data System (ADS)

Contamination avoidancerefers to the military doctrine of avoiding or minimizing the effects of Chemical and Biological (CB) threats. The location, identification and tracking of CB hazards are also major concern for Homeland CB defense. Several advanced detector systems for both chemical and biological threats are being developed for the Armed Services. Current test equipment and methodologies are inadequate for the complete evaluation of these emerging detector systems. Improvements are needed across the entire test spectrum from agent-simulation correction studies and equipment upgrades to field testing techniques. The Contamination Avoidance Detector Test Suite (CADTS) project is funded by the Central Test and Evaluation Investment Program (CTEIP) under the auspices of the Director for Operational Test and Evaluation (DOT&E). This agency is responsible to DoD and congress for the adequate testing of any military hardware before release to the warfighter. This paper discusses the issues involved in CB testing and provides an overview of the characteristics and status of the key capabilities that were selected for funding.

Maret, Arthur R.; Castillo, Lorraine C.; Meadows, Eddie; Condie, Lyman W.

2003-08-01

486

Adaptive Avoidance of Reef Noise  

PubMed Central

Auditory information is widely used throughout the animal kingdom in both terrestrial and aquatic environments. Some marine species are dependent on reefs for adult survival and reproduction, and are known to use reef noise to guide orientation towards suitable habitat. Many others that forage in food-rich inshore waters would, however, benefit from avoiding the high density of predators resident on reefs, but nothing is known about whether acoustic cues are used in this context. By analysing a sample of nearly 700,000 crustaceans, caught during experimental playbacks in light traps in the Great Barrier Reef lagoon, we demonstrate an auditory capability in a broad suite of previously neglected taxa, and provide the first evidence in any marine organisms that reef noise can act as a deterrent. In contrast to the larvae of species that require reef habitat for future success, which showed an attraction to broadcasted reef noise, taxa with a pelagic or nocturnally emergent lifestyle actively avoided it. Our results suggest that a far greater range of invertebrate taxa than previously thought can respond to acoustic cues, emphasising yet further the potential negative impact of globally increasing levels of underwater anthropogenic noise. PMID:21326604

Simpson, Stephen D.; Radford, Andrew N.; Tickle, Edward J.; Meekan, Mark G.; Jeffs, Andrew G.

2011-01-01

487

Air Masses and Weather Patterns  

NSDL National Science Digital Library

This undergraduate meteorology tutorial discusses how meteorologists use the concepts of air masses and fronts in forecasting. Students learn how to use knowledge of weather patterns and forecasts to make the equivalent of persistence forecasts (the weather tomorrow will be the same as today), both simple and advanced. These techniques are the best available when no computer forecasts are around, and are essential for modifying or correcting computer forecasts.

Nielsen-Gammon, John

1996-01-01

488

Weather data dissemination to aircraft  

NASA Technical Reports Server (NTRS)

Documentation exists that shows weather to be responsible for approximately 40 percent of all general aviation accidents with fatalities. Weather data products available on the ground are becoming more sophisticated and greater in number. Although many of these data are critical to aircraft safety, they currently must be transmitted verbally to the aircraft. This process is labor intensive and provides a low rate of information transfer. Consequently, the pilot is often forced to make life-critical decisions based on incomplete and outdated information. Automated transmission of weather data from the ground to the aircraft can provide the aircrew with accurate data in near-real time. The current National Airspace System Plan calls for such an uplink capability to be provided by the Mode S Beacon System data link. Although this system has a very advanced data link capability, it will not be capable of providing adequate weather data to all airspace users in its planned configuration. This paper delineates some of the important weather data uplink system requirements, and describes a system which is capable of meeting these requirements. The proposed system utilizes a run-length coding technique for image data compression and a hybrid phase and amplitude modulation technique for the transmission of both voice and weather data on existing aeronautical Very High Frequency (VHF) voice communication channels.

Mcfarland, Richard H.; Parker, Craig B.

1990-01-01

489

7 Hormones and alternative reproductive tactics in vertebrates RUI F. OLIVEIRA, ADELINO V. M. CANA RIO, AND ALBERT F. H. ROS  

E-print Network

7 · Hormones and alternative reproductive tactics in vertebrates RUI F. OLIVEIRA, ADELINO V. M? Alternative Reproductive Tactics, ed. Rui F. Oliveira, Michael Taborsky, and H. Jane Brockmann. Published by

490

Everyday People Making a Difference on College Campuses: The Tempered Grassroots Leadership Tactics of Faculty and Staff  

ERIC Educational Resources Information Center

This article describes a study of the tactics used by faculty and staff grassroots leaders at colleges and universities to create important changes that increase the capacity for leadership. The study identifies how academic and administrative staff, as employees within an academic culture, have access to grassroots leadership tactics that honor…

Kezar, Adrianna; Gallant, Tricia Bertram; Lester, Jaime

2011-01-01

491

Jurors Believe Interrogation Tactics Are Not Likely To Elicit False Confessions: Will Expert Witness Testimony Inform Them Otherwise?  

Microsoft Academic Search

Situational factors – in the form of interrogation tactics – have been reported to unduly influence innocent suspects to confess. This study assessed jurors’ perceptions of these factors and tested whether expert witness testimony on confessions informs jury decision-making. In Study 1, jurors rated interrogation tactics on their level of coerciveness and likelihood that each would elicit true and false

Iris Blandon-Gitlin; Kathryn Sperry; Richard Leo

2009-01-01

492

Jurors believe interrogation tactics are not likely to elicit false confessions: will expert witness testimony inform them otherwise?  

Microsoft Academic Search

Situational factors – in the form of interrogation tactics – have been reported to unduly influence innocent suspects to confess. This study assessed jurors' perceptions of these factors and tested whether expert witness testimony on confessions informs jury decision making. In Study 1, jurors rated interrogation tactics on their level of coerciveness and likelihood that each would elicit true and

Iris Blandón-Gitlin; Katheryn Sperry; Richard Leo

2011-01-01

493

Tactical missile aerodynamics - General topics. Progress in Astronautics and Aeronautics. Vol. 141  

SciTech Connect

The present volume discusses the development history of tactical missile airframes, aerodynamic considerations for autopilot design, a systematic method for tactical missile design, the character and reduction of missile observability by radar, the visualization of high angle-of-attack flow phenomena, and the behavior of low aspect ratio wings at high angles of attack. Also discussed are airbreathing missile inlets, 'waverider' missile configurations, bodies with noncircular cross-sections and bank-to-turn missiles, asymmetric flow separation and vortex shedding on bodies-of-revolution, unsteady missile flows, swept shock-wave/boundary-layer interactions, pylon carriage and separation of stores, and internal stores carriage and separation.

Hemsch, M.J. (Lockheed Engineering and Sciences Co., Hampton, VA (United States))

1992-01-01

494

Synthetic aperture radar modeling for the Watchkeeper tactical UAV program  

NASA Astrophysics Data System (ADS)

Critical to the performance of any synthetic aperture radar (SAR) system is accurate compensation for aircraft motion during the imaging aperture. This is thought to be particularly important for Unmanned Aerial Vehicles (UAVs) operating in poor weather conditions where the aircraft may be subject to pronounced turbulence effects. This paper presents some initial findings of an investigation into the effects of aircraft motion on SAR azimuth point spread function for given levels of motion spectrum suppression as supplied by the radar's motion compensation processing. With validation, this approach will allow indicative levels of SAR performance to be estimated over a wide range of operating conditions and hence provides a useful source of advice when considering procurement options.

Jolly, Alistair D.; Thompson, Peter

2002-07-01

495

A, Science Service Feature ? WHY TRE WEATHER ?  

E-print Network

No. 228 May 80 A, Science Service Feature ? WHY TRE WEATHER ? Dr, Charles E', Brooks of C 1ark% carefully follow the Weather Bureau's forecast. Tho khserver at the central office c)f ,the Weather Bureau unnecessarily, neither does he get wet. Though the weather rilanls wife scoffs at his forecasts, she always asks

496

Weather-Ready Nation Douglas Hilderbrand  

E-print Network

Weather-Ready Nation Douglas Hilderbrand Weather-Ready Nation Ambassador Lead Sea Grant Monthly Meeting May 6, 2014 #12;National Weather Service 6 Atlantic Basin Hurricanes 1,300 Tornadoes 5,000 Floods an increasing number of extreme weather events at increasing cost to the nation. (Image source: Munich Re, 2014

497

-A Science Service Feature ? WHY THE WEATHER ?  

E-print Network

No. 772 Oct. 31 -A Science Service Feature ? WHY THE WEATHER ? By Dr. Charles B. Brooks of Clark University. FORECASTING WEATHER FOR BEES Many people consult the Weather Bureau before planning a picnic o r the service. In the f a l l of 1923 the Weather Bureau started a Special service In theregion north

498

Space Weather Basics, 2nd Edition  

NSDL National Science Digital Library

This module presents an overview of space weather processes, their impacts on Earth and human activities, and the technologies used for forecasting space weather events. The module goal is to provide NWS forecasters a basic understanding of space weather and the operations of NOAA's Space Weather Prediction Center (SWPC). It will be of interest to a general audience as well.

Comet

2012-01-11

499

Weather Radar and Instrumentation: Laboratory Modules  

NSDL National Science Digital Library

These 16 radar education modules, developed for the Weather Radar and Instrumentation Curriculum at the University of Oklahoma, provide hands-on instruction for beginning, intermediate, or advanced students to learn about radar systems, especially weather radar. Topics include hardware, weather radar, adaptive systems, advanced hydrometeors, applications of weather radar, and atmospheric interpretations. The modules may be downloaded.

500

AWE: aviation weather data visualization environment  

Microsoft Academic Search

Weather is one of the major causes of aviation accidents. General aviation (GA) flights account for 92% of all the aviation accidents. In spite of all the official and unofficial sources of weather visualization tools available to pilots, there is an urgent need for visual- izing several weather related data tailored for general aviation pilots. Our system, Aviation Weather Data

Lilly Spirkovska; Suresh K. Lodha

2002-01-01