77 research outputs found
Oblique Impact of Projectile on Thin Aluminium Plates
Get PDFExperiments were performed, wherein cylindrical projectiles made of hardened steel were impacted on commercially available aluminium plates at different angles. Projectiles were of 12.8 mm diameter and plates were of 0.81 mm, 1.52mm and 1.91mm thicknesses. Based on the experimental results, an analytical model has been developed to predict the residual velocity of the projectile and the ballistic limit of the plate
Competing single-particle and collective states in the low-energy structure of I
No full textTo understand the low-energy structure of the neutron deficient iodine isotopes, lifetimes for the low-lying 9/2+ and 11/2+ positive-parity states in 113I have been measured as τ = 28(4) ps and τ = 3.7(7) ps, respectively. The lifetime for the 11/2− state, which feeds the 9/2+ and 11/2+ states, was remeasured with improved accuracy as τ = 216(7) ps. The reduced transition probability, B(E2) = 32(5) W.u., for the 9/2+ → 5/2+ transition agrees with that calculated within the shell model using a Hamiltonian based on the charge-dependent Bonn nucleon-nucleon interaction. In contrast, the much larger transition probability, B(E2) = 209(39) W.u., measured for the 11/2+ → 7/2+ transition has been interpreted, with the aid of configuration-constrained total Routhian surface calculations, as resulting from a slightly γ -soft rotor with an associated quadrupole deformation of β2 ≈ 0.18. Remarkably similar reduced E1 transition probabilities of 5.5(5) × 10−4 and 4.9(5) × 10−4 W.u. were deduced for the 11/2− → 9/2+ and 11/2− → 11/2+ transitions, respectively, which feed apparently dissimilar but competing structures
Early verb inflection in lithuanian
No full textThe source of the data used in this paper are recordings of conversations with a Lithuanian girl, Rūta. Rūta lives in Vilnius and is the only child in the family. Both parents speak standard Lithuanian without dialectal influences. The recordings were taken on a free basis without a fixed schedule, then transcribed by the mother of the child, double-checked and coded in accordance with CHILDES by the author of the paper. At the moment of writing this contribution the data taken between 1;7-2;5 have been fully processed. Over this period about 34.5 hours of recordings were collected
Heterodera delvii n. sp. (Nematoda : Heteroderidae), a parasite of ragi (Eleusine coracan) in Bangalore, India
No full textE3 strength of the 11(-) to 8(+) isomeric decays in Pb-194 and Pb-196 and oblate deformation
No full textThe E3 decays of the 11(-) isomers in the isotopes Pb-194 and Pb-196 have been studied experimentally and evaluated in terms of configuration mixing due to the development of oblate deformation. New results include a remeasurement of the lifetime of the 11(-) isomer in Pb-194 and clarification of the intensities of its main decay branches including the known 496 keV E3 branch. Its intensity is an order of magnitude weaker than previously reported, leading to an E3 transition strength of 29(4) W.u. Limits are placed on possible E3 decays of the 11(-) isomer in Pb-196 to a previously assigned 8(+) two-proton state. Neither the branch, nor the state is observed. An alternative 562 keV transition to a new state at 2630 keV is proposed, with an E3 strength of 26(2) W.u. The approximately constant E3 strength for the range of even-even isotopes Pb190-196 is consistent with an oblate deformation for the 11(-) state of similar magnitude. This is supported by K-constrained potential-energy-surface calculations for the 11(-) and 8(+) configurations.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000234337400032&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, NuclearSCI(E)15ARTICLE6null7
The Sunflower, v.47, no.16 (January 8, 1942)
No full textImages in this collection were made from commercially produced and digitized microfilm, may be of poor quality, and will be gradually replaced by copies digitized by Special Collections from original paper copies. Source material held by University Libraries Special Collections and University Archives; processed by the University Libraries Technical Services. Please contact Special Collections at [email protected] directly for help with low quality images.Article(s): Ensign training is offered -- Civil service announces tests -- Blue Key plans after-final fling -- Red Cross unit will be formed in new semester -- New refreshment dispenser installed in science building -- Elliott works in Washington on C.A.A. brief -- Christmas picture designed at university is reproduced -- Heath is to replace Hammond -- First varsity of new year to be January 9 -- Polish folk lore is being recorded -- Semester examinations scheduled for January 19-23 -- Crew seeks chirper -- Comptroller spends portion of vacation in practice blackout -- Pacific coast air schools are closed -- Schedules prepared for night classes -- Art student enlists -- Yule decorations given high praise -- Information posted on graduate study -- Deans to conduct survey -- First aid course to be offered -- Parnassus pix contest nears second deadline -- Students greet soldiers -- Lee outlines seven points for upholding civilian morale / Associated Collegiate Press -- Wright to audit treasurer's books -- Speech league to hold tourney on W.U. campus -- War posters are on display -- W.U. student joins U.S. Coast Guard -- Students prepare schedules -- W.U. art students sell own calendars -- Conservation will be resumed now as it was in World War I -- Summing up a month of war for the United States -- Typed on a Wednesday / Fred Higginson -- Shocking news / Bill Cunningham -- University bulletin -- Shocker shots / McAuley -- E.G. Lange and Paddy have lonliest job on the campus -- Wheaties contest will end Jan. 8 -- Mikesell to lecture -- Psychologist is author -- New hair dryer devised -- America's soldiers -- Shocker grads aiding in war effort -- Famous records used in teaching -- Wichita Police Department makes use of lie detector -- Plants grow in greenhouse despite winter -- Students, graduates announce their engagements and marriages in course of recent holiday season -- Pi Epsilon Delta initiates members -- Roundabout the campus / Cattie Hattie -- Alpha Epsilon to have election -- Y.W. changes meeting -- Marriages continue rapid increase over 1940 record -- Pi Kappa Psi group formed by girls from other sororities -- Music student arranges program -- Webster mothers entertain at tea -- W.U. bookstore is freshly painted -- Choosing candy in bookstore from 75 varieties is difficult -- Red Cross drive soon -- Lorance publishes two poetry volumes -- City college cage title in balance tonight -- Shocker five meet Quakers tonight to defend championship -- Faculty wins 1941 volleyball title -- Bowling teams to clash today -- New athletic director may be named soon -- Frosh prepare for cage squad -- Many sign up for ping pong matches -- Phi Sigs lead in intramural team standings -- Emporia gains win over Shocker team -- Girls must shoot rifle matches today -- Ten-year W.U.-Friends record -- In a Shocker sports corner / Bill Hodge -- Shockers lose at tournament -- Coed volleyball seeking rooters -- History reveals basketball barely missed name of 'box ball' -- Gym shorts / Frances BlumePhotograph(s): Vocalist leaves: Betty Sheridan, the "Chief Betty Officer" of the Varsity Crew, who was moved to Evanston, Ill., thereby creating a vacancy in her former position of vocalist for the organization. p. 1 -- Cadets practice precision flying: Speeding through the air in his low wing monoplane, this Flying Cadet at Randolph Field, Texas, is one of 410 to complete the basic phase of their flight training at the "West Point of the Air." p. 3 -- Sophomore guard: Johnny Hyndman. p. 4 -- Shocker forward: Don Hollar. p.
On polar Legendre polynomials
Get PDF10 pages, no figures.-- MSC2000 codes: Primary 42C05; Secondary 33C25.-- ArXiv pre-print available at: http://arxiv.org/abs/0709.4537Accepted in Rocky Mountain Journal of Mathematics.We introduce a new class of polynomials {Pn}, that we call polar Legendre polynomials, they appear as solutions of an inverse Gauss problem of equilibrium
position of a field of forces with n + 1 unit masses. We study algebraic, differential
and asymptotic properties of this class of polynomials, that are simultaneously
orthogonal with respect to a differential operator and a discrete-continuous Sobolev
type inner product.Research by first author (H.P.) was partially supported by Dirección General de Investigación, Ministerio de Ciencia y Tecnología de España, under grant MTM2006-13000-C03-02, by Comunidad de Madrid-Universidad Carlos III de Madrid, under grant CCG06-UC3M/EST-0690 and by Centro de Investigación Matemática de Canarias (CIMAC). Research by second author (J.Y.B.) was supported by CNPq-TWAS. Research by third author (W.U.) was partially supported by Centro de Investigación Matemática de Canarias (CIMAC).En prens
Two-hole structure outside Ni78: Existence of a μs isomer of Co76 and β decay into Ni76
No full textInternational audienceIn the EURICA campaign aimed at exploration of the Ni78 region, an isomeric state of Co76 has been observed via γ-ray spectroscopy. The nuclei were produced by in-flight fission of a U238 beam at the Radioactive Isotope-Beam Factory. Two coincident γ rays of 192.02(30) and 446.4(7) keV from the decay of a t1/2=2.96(2925)μs isomeric state of Co76 have been observed. The decay of the isomer was assigned to an E1 transition with a reduced transition probability of B(E1;3+→2−)=1.79(16)×10−8 W.u. A β-decaying state with spin-parity 1− and a half-life of 16(4) ms was also observed in the data, and the known state with a half-life of 22(75) ms was assigned to have a spin-parity of 8−. Furthermore, the isomer of Ni76 has been remeasured to 547.8(33) ns giving a B(E2;8+→6+) value of 0.786(5) W.u. A new excited state at 2994.6(5) keV, decaying via a γ ray of 2004.5(4) keV, has also been observed. This is in agreement with either of the predicted 0+2 or 2+2 states. These results are discussed in terms of the shell model and the interaction of the νp1/2 and πf7/2 orbitals
Backscatter Sensors Communication for 6G Low-Powered NOMA-Enabled IoT Networks Under Imperfect SIC
No full textThe combination of nonorthogonal multiple access (NOMA) using power-domain with backscatter communication (BC) is expected to connect large-scale Internet of things (IoT) devices in the future sixth-generation era. This article introduces a BC in a multicell IoT network, where a source in each cell transmits a superimposed signal to its associated IoT devices using NOMA. The backscatter sensor tag (BST) also transmits data to IoT devices by reflecting and modulating the superimposed signal of the source. A new optimization framework is provided that simultaneously optimizes the total power of each source, power allocation coefficient of IoT devices, and RC of BST under imperfect successive interference cancellation decoding. This work aims to maximize the total energy efficiency (EE) of the IoT network subject to the quality of services of each IoT device. The problem is first transformed using the Dinkelbach method and then decoupled into two subproblems. The Karush-Kuhn-Tucker conditions and dual Lagrangian method are employed to obtain efficient solutions. In addition, we also calculate the EE of the conventional NOMA network without BC as a benchmark framework. Simulation results unveil the advantage of our considered NOMA BC network over the conventional NOMA network in terms of system total EE. © 2007-2012 IEEE
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