Comparative verification of operational 6-h quantitative precipitation forecast (QPF) products used for stream-flow models run at National Weather Service (NWS) River Forecast Centers (RFCs) is presented. The QPF prod...
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Comparative verification of operational 6-h quantitative precipitation forecast (QPF) products used for stream-flow models run at National Weather Service (NWS) River Forecast Centers (RFCs) is presented. The QPF products include 1) national guidance produced by operational numerical weather prediction (NWP) models run at the National Centers for Environmental Prediction (NCEP), 2) guidance produced by forecasters at the Hydrometeorological Prediction Center (HPC) of NCEP for the conterminous United States, 3) local forecasts produced by forecasters at NWS Weather Forecast Offices (WFOs), and 4) the final QPF product for multi-WFO areas prepared by forecasters at RFCs. A major component of the study was development of a simple scoring methodology to indicate the relative accuracy of the various QPF products for NWS managers and possibly hydrologic users. The method is based on mean absolute error (MAE) and bias scores for continuous precipitation amounts grouped into mutually exclusive intervals. The grouping (stratification) was conducted on the basis of observed precipitation, which is customary, and also forecast precipitation. For ranking overall accuracy of each QPF product, the MAE for the two stratifications was objectively combined. The combined MAE could be particularly useful when the accuracy rankings for the individual stratifications are not consistent. MAE and bias scores from the comparative verification of 6-h QPF products during the 1998/99 cool season in the eastern United States for day 1 (0-24-h period) indicated that the HPC guidance performed slightly better than corresponding products issued by WFOs and RFCs. Nevertheless, the HPC product was only marginally better than the best-performing NCEP NWP model for QPF in the eastern United States, the Aviation (AVN) Model. In the western United States during the 1999/2000 cool season, the WFOs improved on the HPC guidance for day 1 but not for day 2 or day 3 (24-48- and 48-72-h periods, respectively
SUMMARYSUMMARYThis article addresses two questions: How is preaching to a congregation of senior citizens the same as preaching to younger persons; and how is it different? It includes some practical suggestions for s...
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SUMMARYSUMMARYThis article addresses two questions: How is preaching to a congregation of senior citizens the same as preaching to younger persons; and how is it different? It includes some practical suggestions for sermon preparation and delivery by ministers whose congregations contain a number of older persons with specific needs.
The new legislation contained within the UKYouth Justice and Criminal Evidence Act 1999, which comes into force in 2001, offers 'special measures' to enable vulnerable witnesses to give improved evidence in co...
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A scheme of guidance and control is presented to meet the requirements for automatic landing of unmanned aerial vehicles (UAVs) based on the airborne digital flight control system and radio tracker on ground station. ...
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A scheme of guidance and control is presented to meet the requirements for automatic landing of unmanned aerial vehicles (UAVs) based on the airborne digital flight control system and radio tracker on ground station. An automatic landing system is realized for an unmanned aerial vehicle. The results of real time simulation and flight test are given to illustrate the effectiveness and availability of the scheme. Results meet all the requirements for automatic landing of the unmanned aerial vehicle.
On October 15, 2002, the United Kingdom (UK) Health and Safety Executive (HSE) launched new guidance for the engineering industry, aimed at reducing health risks from metalworking fluids (MWFs). This guidance was the ...
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While successive reports concerned with mental health services have emphasized the importance of continuing professional development for mental health nurses, there have been long-standing concerns about the provision...
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While successive reports concerned with mental health services have emphasized the importance of continuing professional development for mental health nurses, there have been long-standing concerns about the provision of appropriate courses and opportunities for attendance. Drawing from a longitudinal study of the careers of a cohort of mental health diplomates, this paper focuses on fulfilment of their continuing education plans in the early post-qualification period. During the first 6 months, just under half the cohort had wanted to start a course but been unable to do so. For some, even at this early career stage, dissatisfaction with continuing education opportunities was cited as reason for leaving, or considering leaving, a first job. Reasons for starting courses included career progress and meeting the care-giving needs of the immediate work situation. Diplomates may need guidance on their continuing education needs;there was much uncertainty about plans to take courses and moreover, demand for courses which they had wanted to start but been unable to do so, was not always sustained.
By being holistic, inclusion implies the involvement of a wide variety of professionals coming from very diverse professional and institutional backgrounds. It will only find its unity in a common focus on the individ...
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By being holistic, inclusion implies the involvement of a wide variety of professionals coming from very diverse professional and institutional backgrounds. It will only find its unity in a common focus on the individual project and in the coherence of all participants' contributions, interactions and interrelationships. Because such coherent functioning is far from being spontaneous, the proposed analysis aims to identify some features contributing to the coherence of mainstream schooling situations and to the quality of the guidance of the assistant. It reveals that this coherence lies in the ability to define clearly what is expected by a mainstream education process, so that the different actors can combine an integrative perspective based on schools' needs and a participative approach based on children's needs. Secondly, it appears that guidance is likely to be appropriate to the child's needs if it is based in the coinvolvement of inter-individual and organizational contractual relationships. Finally, the analysis reveals that the coherence of a mainstream education process presupposes strategies through which equal cooperation systems, taking into account inter-individual dynamics as well as organisational logics, can be created.
Graduates of the service academies operated by the Army, Navy, and Air Force currently make up approximately 18 percent of the officer corps for the nation's armed services. The academies represent the military...
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Graduates of the service academies operated by the Army, Navy, and Air Force currently make up approximately 18 percent of the officer corps for the nation's armed services. The academies represent the military's most expensive source of new officers. The Department of Defense (DOD) pays the full cost of a student's 4-year education at the academies; and the related cost has increased over the past 4 years. Admission to the academies is highly competitive. The academies use a 'whole person' method to make admission decisions. Recent studies by the Air Force raised questions about possible adverse effects of whole person admissions policies on student quality. GAO was asked to review all three service academies and specifically address the extent to which (1) DOD oversees the service academies, (2) applicants are granted waivers of academic standards, and (3) various groups of students differ in admissions scores and academy performance.
In this paper, the necessity of coincident guidance for ultrawideband anti-radiation missile (ARM) is discussed. It is pointed out that energy receiver of the same aperture is the key problem for double mould guidance...
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In this paper, the necessity of coincident guidance for ultrawideband anti-radiation missile (ARM) is discussed. It is pointed out that energy receiver of the same aperture is the key problem for double mould guidance of ultrawideband passive home and infrared imaging home. The plan of ultrawideband microwave passive home applying to same aperture energy receiver is analyzed. Based on the principle of infrared imaging, the front plane array is chosen. The structure of a same aperture is designed. The test result shows that the implementation of the same aperture energy receiver is available.
Y2002-63334-2688 0307797陀螺系统的容错控制=Fault tolerant control of a gyro-scope system[会,英]/Campos-Delgado,D.U.& Zhou,K.//Proceedings of the 2001 American Control Confer-ence Vol.4 of 6.—2688～2693(HE)Y2002-6...
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Y2002-63334-2688 0307797陀螺系统的容错控制=Fault tolerant control of a gyro-scope system[会,英]/Campos-Delgado,D.U.& Zhou,K.//Proceedings of the 2001 American Control Confer-ence Vol.4 of 6.—2688～2693(HE)Y2002-63335-3352 0307798基于健壮状态相关 Riccati 方程的导航规则=Robuststate dependent Riccati equation based guidance laws[会,英]/Balakrishnan,S.N.& Xin,M.//Proceedings
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