scholarly journals Local and Regional PV Power Variability in the Northeastern U.S.: Implications for Simplified Utility Flicker Screening Analyses

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Brice Smith ◽  
Douglas Armstead
Keyword(s):  
New York ◽  
National Laboratory ◽  
State University ◽  
Solar Pv ◽  
Distribution Grid ◽  
Multiple Systems ◽  
Solar Systems ◽  
Oak Ridge ◽  
City State ◽  
The Impact

This paper presents new evidence supporting the development of a screening threshold to evaluate the impact aggregations of solar PV facilities in the northeastern United States can have on voltage deviations in the distribution grid (often called flicker). Using measurements from solar irradiance meters and customer-sited monitoring equipment for residential and light commercial solar systems in Central New York along with data from the Measurement and Instrumentation Data Centers at the Oak Ridge National Laboratory, Elizabeth City State University, and Bluefield College, we present multiple lines of support for the adoption of a flicker screening threshold equivalent to a 5% change in voltage resulting from a full-on to full-off transition of a solar facility. This approach is based on both the newer flicker perception limits in IEEE 1453-2015 and the previous limits derived from the flicker curves in IEEE 519-1992 and is consistent with recent draft recommendations from the Electric Power Research Institute (EPRI) for use in New York. Measurements of correlations between fluctuations at different sites along with a model for high densities of solar facilities are applied to allow the impact of multiple systems on a single feeder to be taken into account while maintaining the simplicity of a single screening threshold.

ORNL Evaluation of Safety Cases for Two Belgian Reactor Pressure Vessels Containing Quasi-Laminar Defects

2017 ◽  
Author(s):  
Hilda B. Klasky ◽  
B. Richard Bass ◽  
Terry L. Dickson ◽  
Sarma B. Gorti ◽  
Randy K. Nanstad ◽  
...  
Keyword(s):  
New York ◽  
Finite Element ◽  
Structural Integrity ◽  
National Laboratory ◽  
Relevant Literature ◽  
Pressure Vessels ◽  
Oak Ridge ◽  
Safety Margins ◽  
Safety Cases ◽  
Reactor Pressure

The Oak Ridge National Laboratory (ORNL) performed a detailed technical review of the 2015 Electrabel (EBL) Safety Cases prepared for the Belgium reactor pressure vessels (RPVs) at Doel 3 and Tihange 2 (D3/T2). The Federal Agency for Nuclear Control (FANC) in Belgium commissioned ORNL to provide a thorough assessment of the existing safety margins against cracking of the RPVs due to the presence of almost laminar flaws found in each RPV. Initial efforts focused on surveying relevant literature that provided necessary background knowledge on the issues related to the quasi-laminar flaws observed in D3/T2 reactors. Next, ORNL proceeded to develop an independent quantitative assessment of the entire flaw population in the two Belgian reactors according to the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section XI, Appendix G, “Fracture Toughness Criteria for Protection Against Failure,” New York (both 1992 and 2004 versions). That screening assessment of the EBL-characterized flaws in D3/T2 used ORNL tools, methodologies, and the ASME Code Case N-848, “Alternative Characterization Rules for Quasi-Laminar Flaws”. Results and conclusions derived from comparisons of the ORNL flaw acceptance assessments of D3/T2 with those from the 2015 EBL Safety Cases are presented in the paper. The ORNL screening analyses identified fewer flaws than EBL that were not compliant with the ASME Section XI (1992) criterion; the EBL criterion imposed additional conservatisms not included in ASME Section XI. Furthermore, ORNL’s application of the updated ASME Section XI (2004) criterion produced only four non-compliant flaws, all due to design-basis loss-of-coolant loading transients. Among the latter, only one flaw remained non-compliant when analyzed using the warm-prestress (WPS) cleavage fracture model typically applied in USA flaw assessments. ORNL’s independent refined analysis of that flaw (#1660, which was also non-compliant in the EBL screening assessments) rendered it compliant when modeled as a more realistic individual quasi-laminar flaw using a 3-dimensional XFEM (eXtended Finite Element Method) approach available in the ABAQUS© finite element code. Taken as a whole, the ORNL-specific results and conclusions confirmed the structural integrity of Doel 3 and Tihange 2 under all design transients with ample margin in the presence of the 16,196 detected flaws.

scholarly journals Book Reviews

1978 ◽  
Vol 3 (2) ◽  
pp. 79-90
Author(s):  
Donald W. Whisenhunt ◽  
Michael Vaughan Woodward ◽  
David E. Kyvig ◽  
Robert W. Sellen ◽  
Stephen John Kneeshaw ◽  
...  
Keyword(s):  
New York ◽  
Roman Empire ◽  
Cold War ◽  
Latin American ◽  
American Foreign Policy ◽  
Third Reich ◽  
State University ◽  
The Cold War ◽  
The University ◽  
The Impact

Charles F. Delzell, ed. The Future of History. Nashville, Tennessee: Vanderbilt University Press, 1977~ Pp. xi, 263. Cloth, $13.95. Review by Robert N. Seidel of Empire State College, Rochester Center. David E. Kyvig and Myron Marty. Your Family History: A Handbook for Research and Writing. Arlington Heights, Illinois: AHM, 1978. Pp . 71, plus Summary Data Sheets and a Generations Chart. Paper, $2.95. Review by Philip R. Rulon of Northern Arizona University. Maurice Meisner, Mao's China: A History of the People's Republic. New York: The Free Press, 1977. xiv, 416. Cloth, $17.95; Wang Gungwu. China and the World since 1949: The Impact of Independence, Modernity and Revolution. New York: St. Martin's Press, 1977. Pp. vii, 190. Cloth, $16.95; Paper, $4.95. Review by Lee Feigon of Colby College. Peter N. Stearns. The Face of Europe. St. Louis: Forum Press, 1977. Pp. 305. Paper, $6.95. Review by W. Benjamin Kennedy of West Georgia College. Nicholas H. Steneck, Science and Creation in the Middle Ages. Notre Dame, Indiana: University of Notre Dame Press, 1977. Pp. 381. Paper, $4.95. Review by Benjamin F. Taggie of Central Michigan University. Denis Mack Smith. Mussolini's Roman Empire. New York: Penguin, 1976. Pp. xi, 322. Paper, $3.95; George L. Mosse. The Nationalization of the Masses: Political Symbolism and Mass Movements in Germany from the Napoleonic Wars through the Third Reich. New York: Meridian, 1975. Pp. xiv, 252. Paper, $4 . 95. Review by Clarence B. Davis of The College of Charleston. Walter Laqueur, ed. The Guerrilla Reader: A Historical Anthology. New York: Meridian, 1977. Pp. 246. Paper, $5.95; Anthony D. Smith, ed., Nationalist Movements. New York: St. Martin's Press, 1976. Pp. vi, 185. Cloth, $15.95. Review by Leslie Clement Duly of the University of Nebraska-Lincoln. Harold Eugene David, John J. Finan, and F. Taylor Peck. Latin American Diplomatic History: An Introduction. Baton Rouge: Louisiana State University Press, 1977. Pp. viii, 301. Cloth, $15.00; paper $5.95. Review by John T. Reilly of Mount Saint Mary College, Newburgh. Morton Borden and Otis L. Graham, Jr. Speculations on American History. Lexington, Massachusetts: D. C. Heath and Company, 1977. Pp. v, 200. Paper, $3.95. Review by Stephen John Kneeshaw of The School of the Ozarks. Thomas G. Paterson, J. Garry Clifford, and Kenneth J. Hagan. American Foreign Policy: A History. Lexington, Massachusetts: D. C. Heath and Company, 1977. Pp. xviii, 607. Cloth, $10.95. Review by Robert W. Sellen of Georgia State University. Vincent P. DeSantis. The Shaping of Modern America: 1877-1916. St. Louis: Forum Press, 1973. Pp. 259. Paper, $4.95; Michael H. Ebner and Eugene M. Tobin, eds. The Age of Urban Reform: New Perspectives on the Progressive Era. Port Washington, New York: Kennikat Press, 1977. Pp. viii, 211. Cloth $12.95; paper, $7.95; Richard M. Abrams. The Burdens of Progress: 1900-1929. Glenview, Illinois: Scott, Foresman, and Company, 1977. Pp. 199. Paper, $4.95. Review by David E. Kyvig of the University of Akron. Howard Roffman. Understanding the Cold War: A Study of the Cold War in the Interwar Period. Cranbury, New Jersey: Fairleigh Dickinson University Press, 1977. Pp. 198. Cloth, $9.50; William Appleman Williams. American Confronts a Revolutionary World: 1776-1976. New York: William Morrow, 1976. Pp. 224. Cloth, $9.95. Review by Michael Vaughan Woodward of the University of Georgia. Laurence Ivan Seidman. Once in the Saddle: The Cowboy's Frontier, 1866-1896. New York: Mentor, 1977. Pp. 237. Paper, $1.75. Review by Donald W. Whisenhunt of Texas Eastern University.

scholarly journals Medical Capacity Shortages Facilitated the Rapid Dissemination of COVID-19 in Wuhan, New York State, and Italy

2020 ◽  
Author(s):  
Yuehao Xu ◽  
Cheng Zhang ◽  
Lixian Qian
Keyword(s):  
New York ◽  
New York State ◽  
The United States ◽  
Control Measures ◽  
York State ◽  
Travel Restrictions ◽  
Rapid Dissemination ◽  
City State ◽  
And Control ◽  
The Impact

AbstractDuring the coronavirus disease 2019 (COVID-19) outbreak, every public health system faced the potential challenge of medical capacity shortages. Infections without timely diagnosis or treatment may facilitate the stealth transmission and spread of the virus. Using infection and medical capacity information reported in Wuhan in China, New York State in the United States, and Italy, we developed a dynamic susceptible–exposed–infected–recovered (SEIR) model to estimate the impact of medical capacity shortages during the COVID-19 outbreak at the city, state, and country levels. After accounting for the effects of travel restrictions and control measures, we find that the number of infections in Wuhan could have been 39% lower than the actual number if the medical capacity were doubled in this city. Similarly, we find the less shortages in medical capacity in both New York state and Italy, the faster decline in the daily infection numbers and the fewer deaths. This study provides a method for estimating potential shortages and explains how they may dynamically facilitate disease spreading during future pandemics such as COVID-19.

scholarly journals Medical Capacity Shortages Facilitated the Rapid Dissemination of COVID-19 in Wuhan, New York State, and Italy

2021 ◽  
Author(s):  
Yuehao Xu ◽  
Cheng Zhang ◽  
Lixian Qian
Keyword(s):  
New York ◽  
New York State ◽  
The United States ◽  
Policy Makers ◽  
York State ◽  
Proposed Model ◽  
Rapid Dissemination ◽  
City State ◽  
And Control ◽  
The Impact

Abstract Background: During the coronavirus disease 2019 (COVID-19) outbreak, every public health system faced the potential challenge of medical capacity shortages. Infections without timely diagnosis or treatment may facilitate the stealth transmission and spread of the virus. Important as the influence of capacity shortages on the epidemic, it is still unclear how they could intensify the spread of the epidemic qualitatively under different circumstances. Our study aims to throw light on this influence.Methods: Using infection and medical capacity information reported in Wuhan in China, New York State in the United States, and Italy, we developed a dynamic susceptible–exposed–infected–recovered (SEIR) model to estimate the impact of medical capacity shortages during the COVID-19 outbreak at the city, state, and country levels.Results: The proposed model can fit data well (R-square > 0.9). Through sensitivity analysis, we found that doubled capacity would lead to a 39% lower peak infected number in Wuhan. Italy and New York State have similar results.Conclusions: The less shortages in medical capacity, the faster decline in the daily infection numbers and the fewer deaths, and more shortage would lead to steepen infection curve. This study provides a method for estimating potential shortages and explains how they may dynamically facilitate disease spreading during future pandemics such as COVID-19. Based on this, policy makers may figure out some way to explore more medical capacity and control the epidemic better.

International Center for Studies in Creativity

2016 ◽  
pp. 186-211
Author(s):  
Gerard J. Puccio ◽  
Susan Keller Mathers ◽  
Selcuk Acar ◽  
Nur Cayirdag
Keyword(s):  
New York ◽  
Graduate Students ◽  
Problem Solving ◽  
Quantitative Data ◽  
Graduate Program ◽  
State University ◽  
Creative Problem Solving ◽  
The Core ◽  
Creative Problem ◽  
The Impact

This chapter provides an overview of the programs offered by the International Center for Studies in Creativity (ICSC) at Buffalo State, State University of New York, where creativity is taught and studied extensively at the graduate and undergraduate level. Following the discussion on creativity as a 21st century skill and perennial need for creativity in the workforce, programs and courses are introduced along with the historical roots and philosophy of creativity at ICSC. The Creative Problem Solving Model, which represents the core of the curriculum, is described. The chapter also presents the results of the study regarding the impact of the graduate program on the creative problem solving attitudes of the graduate students based on qualitative and quantitative data.

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