Quasi-symmetric 2-(31, 7, 7) designs and a revision of Hamada's conjecture

Quasi-symmetric 2-(28, 12, 11) designs w

Quasi-symmetric 2-(28, 12, 11) designs with an automorphism of order 7

✍ Yuan Ding; Sheridan Houghten; Clement Lam; Suzan Smith; Larry Thiel; Vladimir D. 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 142 KB

All quasi-symmetric 2-(28, 12, 11) designs with an automorphism of order 7 without fixed points or blocks are enumerated. Up to isomorphism, there are exactly 246 such designs. All but four of these designs are embeddable as derived designs in symmetric 2-(64, 28, 12) designs, producing in this way

On a conjecture of jungnickel and tonche

On a conjecture of jungnickel and tonchev for quasi-symmetric designs

✍ Yury J. Ionin; Mohan S. Shrikhande 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 582 KB

Jungnickel and Tonchev conjectured in [4] that if a quasi-symmetric design D is an s-fold quasi-multiple of a symmetric (v,k, A) design with (k, (sl)A) = 1, then D is a multiple. We prove this conjecture under any one of the conditions: s 5 7, k -1 is prime, or the design D is a 3-design. It is show

Analysis and design of spinal-groove bea

Analysis and design of spinal-groove bearings. (66-Lub S-7) : E. A. Muyderman, pp. 291–306; 4 figs., 31 refs.

📂 Article 📅 1968 🏛 Elsevier Science 🌐 English ⚖ 97 KB

[American Institute of Aeronautics and A

[American Institute of Aeronautics and Astronautics 7th Applied Aerodynamics Conference - Seattle,WA,U.S.A. (31 July 1989 - 02 August 1989)] 7th Applied Aerodynamics Conference - A new airfoil design concept

✍ HENNE, P.; GREGG, R. 📂 Article 📅 1989 🏛 American Institute of Aeronautics and Astronautics ⚖ 742 KB

[American Institute of Aeronautics and A

[American Institute of Aeronautics and Astronautics 7th Applied Aerodynamics Conference - Seattle,WA,U.S.A. (31 July 1989 - 02 August 1989)] 7th Applied Aerodynamics Conference - Analysis and design of dual-rotation propellers

✍ PAGE, G.; LIEBECK, R. 📂 Article 📅 1989 🏛 American Institute of Aeronautics and Astronautics ⚖ 577 KB

[American Institute of Aeronautics and A

[American Institute of Aeronautics and Astronautics 7th Applied Aerodynamics Conference - Seattle,WA,U.S.A. (31 July 1989 - 02 August 1989)] 7th Applied Aerodynamics Conference - Hypersonic vehicle forebody design studies and aerodynamic trends

✍ IDE, H.; ARMSTRONG, J.; HANEY, J.; SZEMA, K. 📂 Article 📅 1989 🏛 American Institute of Aeronautics and Astronautics ⚖ 513 KB