Fire and heat resistant laminating resins based on maleimido substituted aromatic cyclotriphosphazene polymer [PDF]
, 1987 4-Aminophenoxy cyclotriphosphazenes are reacted with maleic anhydride to produce maleamic acids which are converted to the maleimides. The maleimides are polymerized. By selection of starting materials (e.g., hexakis amino or trisaminophenoxy trisphenoxy
Fohlen, George M. +2 more
core +1 more source
Utilization of NASA Lewis mobile terminals for the Hermes satellite [PDF]
The high power of the Hermes satellite enables two-way television and voice communication with small ground terminals. The Portable Earth Terminal (PET) and the Transportable Earth Terminal (TET) were developed and built by NASA-Lewis to provide ...
Edelman, E. A. +2 more
core +1 more source
, 2006 Bing doubling is an operation which produces a 2-component boundary link B(K) from a knot K. If K is slice, then B(K) is easily seen to be boundary slice. In this paper, we investigate whether the converse holds.
Bing +8 more
core +2 more sources
Viewpoints of elementary principals and their teachers concerning teachers' meetings as they are conducted within schools in five Massachusetts towns [PDF]
, 1961 Thesis (Ed.M.)--Boston ...
Robinson, Nancy M., Sparks, William V.
core +1 more source
Systems Approach to the Concept of Environment [PDF]
, 1978 Author Institution: Department of Zoology and Institute of Ecology, University of GeorgiaA systems theory of environment formulates causal interactions between things, including organisms, and their environments in terms of four system theoretical ...
Patten, Bernard C.
core
Determinations of rational Dedekind-zeta invariants of hyperbolic manifolds and Feynman knots and links [PDF]
, 1998 We identify 998 closed hyperbolic 3-manifolds whose volumes are rationally related to Dedekind zeta values, with coprime integers $a$ and $b$ giving $a/b vol(M)=(-D)^{3/2}/(2\pi)^{2n-4} (\zeta_K(2))/(2\zeta(2))$ for a manifold M whose invariant trace ...
Borwein, J. M., Broadhurst, D. J.
core +3 more sources
Emergence of tigecycline-resistant Escherichia coli from swine feces and fertilized soil
Ecotoxicology and Environmental SafetyThe emergence and spread of tigecycline-resistant Escherichia coli in livestock environments poses a critical threat to global public health. This study investigated the prevalence, genetic characteristics, and transmission mechanisms of tet(X4)-mediated
Xi Zhou +9 more
doaj +1 more source
Development and fabrication of a solar cell junction processing system [PDF]
Development of a pulsed electron beam subsystem, wafer transport system, and ion implanter are discussed. A junction processing system integration and cost analysis are reviewed.
Banker, S.
core +1 more source
Emergence of tet(X4)-positive hypervirulent Klebsiella pneumoniae of food origin in China
LWT, 2023 Yan Li +6 more
openaire +1 more source