10 research outputs found
A note on the sign (unit root) ambiguities of Gauss sums in index 2 and 4 cases
Recently, the explicit evaluation of Gauss sums in the index 2 and 4 cases
have been given in several papers (see [2,3,7,8]). In the course of evaluation,
the sigh (or unit root) ambiguities are unavoidably occurred. This paper
presents another method, different from [7] and [8], to determine the sigh
(unit root) ambiguities of Gauss sums in the index 2 case, as well as the ones
with odd order in the non-cyclic index 4 case. And we note that the method in
this paper are more succinct and effective than [8] and [7]
Complete Solving for Explicit Evaluation of Gauss Sums in the Index 2 Case
Let be a prime number, for some positive integer , be a
positive integer such that , and let \k be a primitive
multiplicative character of order over finite field \fq. This paper
studies the problem of explicit evaluation of Gauss sums in "\textsl{index 2
case}" (i.e. f=\f{\p(N)}{2}=[\zn:\pp], where \p(\cd) is Euler function).
Firstly, the classification of the Gauss sums in index 2 case is presented.
Then, the explicit evaluation of Gauss sums G(\k^\la) (1\laN-1) in index 2
case with order being general even integer (i.e. N=2^{r}\cd N_0 where
are positive integers and is odd.) is obtained. Thus, the
problem of explicit evaluation of Gauss sums in index 2 case is completely
solved
Thyroid cancer in pediatric population in Romania : 30-year aft Chernobyl accident at Institute of Oncology, Cluj-Napoca, âProf. Dr. Ion Chiricutâ
Influence du rayonnement ultraviolet (UV) sur la stabilitĂ© physico-chimique dâun dosimĂštre du radon : le CN-85
Les dosimĂštres de radon tels que des nitrates de cellulose connaissent souvent une dĂ©gradation sous lâaction de certains facteurs physiques ou chimiques. Nous avons Ă©tudiĂ© le comportement du CN-85, dĂ©tecteur solide de traces nuclĂ©aires (DSTN), en atmosphĂšre tropicale trĂšs ensoleillĂ©e (photo-vieillissement naturel) et dans une enceinte SEPAP 12/24 (photo-vieillissement accĂ©lĂ©rĂ© artificiel), avant son exposition Ă une source de particules alpha (Am-241). Les rĂ©sultats ont montrĂ© des modifications chimiques du dĂ©tecteur, aussi bien en accĂ©lĂ©rĂ© quâen naturel, entraĂźnant un changement de coloration. LâĂ©tude comparĂ©e des deux modes de photo-vieillissement a permis de dĂ©terminer un facteur dâaccĂ©lĂ©ration du vieillissement de 2,5. Lâirradiation aux particules alpha des dĂ©tecteurs a montrĂ© une perte dâefficacitĂ© de 98 % aprĂšs 40 heures dâexposition solaire, ce qui permet de considĂ©rer une durĂ©e limite dâutilisation du DSTN en atmosphĂšre tropicale ne dĂ©passant guĂšre une semaine. Cette durĂ©e dâutilisation pourrait ĂȘtre prolongĂ©e Ă lâintĂ©rieur des habitations du fait dâune baisse des tempĂ©ratures et de la luminositĂ©