323,149 research outputs found
A Conversation with Walter T. Federer
No full textWalter Theodore Federer was born on August 23, 1915 in Cheyenne, Wyoming. He received a B.S. in agronomy from Colorado State University in 1939. In 1941 he received the M.S. degree in plant breeding from Kansas State University. His Ph.D. in mathematical statistics from Iowa State University was awarded in 1948. He held the position of Associate Geneticist while working on the Guayule Research Project, USDA, in Salinas, California. While completing his Ph.D. at Iowa State University, he was Associate Statistician in the Agricultural Marketing Service in Ames, Iowa. His next position was as Professor of Biological Statistics in the College of Agricultural and Life Sciences at Cornell University. He was also the Administrator of the Biometrics Unit in the Department of Plant Breeding. He was awarded the Liberty Hyde Bailey Professor of Statistics Chair in 1978, which he held until retirement in 1986, since which he has had emeritus status. ¶ Dr. Federer was Secretary and Program Coordinator for the Eastern North American Region (ENAR) of the International Biometric Society from 1950 to 1953, President-Elect of ENAR in 1959 and President in 1960. He was Chairman and Executive Secretary of the Committee of Presidents of Statistical Societies (1965–1972), Book Reviews Editor (1964–1972) and Associate Editor for Biometrics (1972–1976), Associate Editor for Communications in Statistics (1972–1994) and Associate Editor for the Journal of Statistical Planning and Inference (1976–1990). He was a member of national, international, university and government panels and boards, and was a consultant for several international research stations. ¶ Dr. Federer is a Fellow of the American Statistical Association (1958), American Association for the Advancement of Science (1962), Royal Statistical Society (1964) and the Institute of Mathematical Statistics (1967), and was elected a Member of the International Statistical Institute (1974). He was awarded the Honor Alumnus Achievement Award (1972) and Honored Alumnus Award (2001) by Colorado State University, and the Distinguished Service in Agriculture Award (1988) by Kansas State University
F-Square Geometries for s = p(m) Illustrated with s = 4, 8, and 9
No full text18 pages, 1 article*F-Square Geometries for s = p(m) Illustrated with s = 4, 8, and 9* (Federer, Walter T.) 18 page
Complete Sets of F(n, n/s) Squares for s=p(k)
No full text5 pages, 1 article*Complete Sets of F(n, n/s) Squares for s=p(k)* (Federer, Walter T.) 5 page
High-resolution mineral dust and sea ice proxy records from the Talos Dome ice core
No full textIn this study we report on new non-sea salt calcium (nssCa2+, mineral dust proxy) and sea salt sodium (ssNa+, sea ice proxy) records along the East Antarctic Talos Dome deep ice core in centennial resolution reaching back 150 thousand years (ka) before present. During glacial conditions nssCa2+ fluxes in Talos Dome are strongly related to temperature as has been observed before in other deep Antarctic ice core records, and has been associated with synchronous changes in the main source region (southern South America) during climate variations in the last glacial. However, during warmer climate conditions Talos Dome mineral dust input is clearly elevated compared to other records mainly due to the contribution of additional local dust sources in the Ross Sea area. Based on a simple transport model, we compare nssCa2+ fluxes of different East Antarctic ice cores. From this multi-site comparison we conclude that changes in transport efficiency or atmospheric lifetime of dust particles do have a minor effect compared to source strength changes on the large-scale concentration changes observed in Antarctic ice cores during climate variations of the past 150 ka. Our transport model applied on ice core data is further validated by climate model data.
The availability of multiple East Antarctic nssCa2+ records also allows for a revision of a former estimate on the atmospheric CO2 sensitivity to reduced dust induced iron fertilisation in the Southern Ocean during the transition from the Last Glacial Maximum to the Holocene (T1). While a former estimate based on the EPICA Dome C (EDC) record only suggested 20 ppm, we find that reduced dust induced iron fertilisation in the Southern Ocean may be responsible for up to 40 ppm of the total atmospheric CO2 increase during T1. During the last interglacial, ssNa+ levels of EDC and EPICA Dronning Maud Land (EDML) are only half of the Holocene levels, in line with higher temperatures during that period, indicating much reduced sea ice extent in the Atlantic as well as the Indian Ocean sector of the Southern Ocean. In contrast, Holocene ssNa+ flux in Talos Dome is about the same as during the last interglacial, indicating that there was similar ice cover present in the Ross Sea area during MIS 5.5 as during the Holocene
On the Fisher-Behrens Test - An M.S. Thesis Problem(s)
No full text16 pages, 1 article*On the Fisher-Behrens Test - An M.S. Thesis Problem(s)* (Federer, W. T.) 16 page
Federer-Čech Couples
No full textIn (5),I considered two-term conditions in π-exact couples, of which the exact couple of Federer (7) is an example. Let M(X, Y)be the space of all maps from X to Y with the compact-open topology. Our aim in this paper is to construct a π-exact couple , where Xis a finite-dimensional (in the sense of Lebesgue) metric space and , a certain (rather large) class of spaces. Specifically, is the class of all topological spaces Xwhich possess the following property (P).(P) Let Y be a (possibly infinite) simplicial complex. There exists x0 ∈ X and y0 ∊ Y such that [X, x0]≃ [Y, y0].In § 5 it will be seen that contains all CW complexes and all metric absolute neighbourhood retracts (ANR)s.</jats:p
On the Construction of Orthogonal F-Squares of Order n from an Orthogonal Array (n, k, s, 2) and an OL (s, t) Set
No full text12 pages, 1 article*On the Construction of Orthogonal F-Squares of Order n from an Orthogonal Array (n, k, s, 2) and an OL (s, t) Set* (Mandeli, John P.; Lee, F.-C. Helen; Federer, Walter T.) 12 page
On the Construction of Complete Sets of F-Squares of Order n=2k, n=2(s)k, p(s), and n=4t with Latin Squares
No full text23 pages, 1 article*On the Construction of Complete Sets of F-Squares of Order n=2k, n=2(s)k, p(s), and n=4t with Latin Squares* (Federer, Walter T.) 23 page
Number of SOSOFS(n,s) For n a Product of Prime Powers
No full text4 pages, 1 article*Number of SOSOFS(n,s) For n a Product of Prime Powers* (Federer, Walter T.) 4 page
S-PLUS Function for Recovering Interblock, Interrow-Column, and Intergradient Information
No full text7 pages, 1 article*S-PLUS Function for Recovering Interblock, Interrow-Column, and Intergradient Information* (Barnard, John; Federer, Walter T.) 7 page
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