On factorizations of limited solubly ω-saturated formations

If F = F₁…Ft is the product of the formations F₁,…,Ft and F ≠ F₁…Fi−₁Fi+₁…Ft for all i = 1,…,t, then we call this product a non-cancellative factorization of the formation F. In this paper we gives a description of factorizable limited solubly ω-saturated formations

On minimal ω-composition non-H-formations

Let H be some class of groups. A formation F is called a minimal τ -closed ω-composition non-H-formation [1] if F * H but F1 ⊆ H for all proper τ -closed ω-composition subformations F₁ of F. In this paper we describe the minimal τ -closed ω-composition non-H-formations, where H is a 2-multiply local formation and τ is a subgroup functor such that for any group G all subgroups from τ (G) are subnormal in G

Paleointensity Record From the 2.7 Ga Stillwater Complex, Montana

The record of geomagnetic intensity captured in the 2.7 Ga Stillwater Complex (Montana, USA) provides a statistical description of the Archean geodynamo. We present results of modified Thellier paleointensity experiments on 441 core specimens, 114 of which pass strict reliability criteria. The specimens are from 53 sites spanning most of the Banded Series rocks in the Stillwater Complex. On the basis of thermochronologic and petrologic evidence, we interpret the highest temperature component of remanence to be a late Archean thermoremanence, though the possibility remains that it is a thermochemical remanence. Thermal models indicate that the highest temperature magnetization component at each of the sites averages ∼20–200 ka of geomagnetic secular variation. The suite of sites as distributed through the Banded Series samples a roughly a 1 Ma time interval. The average of the most reliable paleointensity measurements, uncorrected for the effects of anisotropy or cooling rate, is 38.2 ± 11.3 μT (1σ). Remanence anisotropy, cooling rate, and the nonlinear relationship between applied field and thermoremanence have a significant effect on paleointensity results; a corrected average of 30.6 ± 8.8 μT is likely a more appropriate value. Earth\u27s average dipole moment during the late Archean (5.05 ± 1.46 × 1022Am2, λpmag = 44.5°) was well within the range of estimates from Phanerozoic rocks. The distribution of site-mean paleointensities around the mean is consistent with that expected from slow cooling over timescales expected from thermal models and with secular variation comparable to that of the Phanerozoic field

Paleomagnetic Results from the Snake River Plain: Contribution to the Time-Averaged Field Global Database

This study presents paleomagnetic results from the Snake River Plain (SRP) in southern Idaho as a contribution to the time-averaged field global database. Paleomagnetic samples were measured from 26 sites, 23 of which ( 13 normal, 10 reverse) yielded site mean directions meeting our criteria for acceptable paleomagnetic data. Flow ages (on 21 sites) range from 5 ka to 5.6 Ma on the basis of Ar-40/Ar-39 dating methods. The age and polarity for the 21 dated sites are consistent with the Geomagnetic Reversal Time Scale except for a single reversely magnetized site dated at 0.39 Ma. This is apparently the first documented excursion associated with a period of low paleointensity detected in both sedimentary and igneous records. Combining the new data from the SRP with data published from the northwest United States between the latitudes of 40degrees and 50degreesN, there are 183 sites in all that meet minimum acceptability criteria for legacy and new data. The overall mean direction of 173 normally magnetized sites has a declination of 2.3degrees, inclination of 61.4degrees, a Fisher concentration parameter (kappa) of 58, and a radius of 95% confidence (alpha(95)) of 1.4degrees. Reverse sites have a mean direction of 182.4degrees declination, -58.6degrees inclination, kappa of 50, and alpha(95) of 6.9degrees. Normal and reversed mean directions are antipodal and indistinguishable from a geocentric axial dipole field at the 95% confidence level. Virtual geomagnetic pole dispersion was found to be circularly symmetric, while the directional data were elongate north-south. An updated and corrected database for the northwestern U. S. region has been contributed to the Magnetics Information Consortium (MagIC) database at http://earthref.org

О ПОЛУАБЕЛЕВОСТИ n-АРНЫХ ГРУПП

The paper presents a new criterion of semiabelian of an n-ary group on the basis of the fact of self-returning of an arbitrary point with respect to the elements of the succession, composed of the midpoints of the sides of an arbitrary k-angle with an odd k (k ≥ 3) and one of the vertices of the k-angle in term symmetrical point and vector n-ary groups.Устанавливаются новые критерии полуабелевости n-арной группы на основании факта самосовмещения произвольной точки (элемента) n-арной группы относительно элементов последовательности, составленной из середин сторон произвольного k-угольника с нечетным k (k ≥ 3) и одной из вершин этого k-угольника в терминах симметричных точек и векторов n-арных групп

Leonid Shemetkov. His entire life devotion

It is given a short scientific biography of Professor L.A. Shemetkov

Role of Intranasal Topical Steroid in Pediatric Sleep Disordered Breathing and Influence of Allergy, Sinusitis, and Obesity on Treatment Outcome

ObjectivesTo evaluate efficacy of short term intranasal corticosteroid (mometasone furoate) treatment in pediatric sleep-disordered breathing (SDB) patients.MethodsA prospective, observational study was done. A total of 41 children (2-11 years old) were enrolled into this study. All patients received 4-weeks course of mometasone furoate 100 µg/day treatment. They were evaluated at pretreatment and immediately after treatment with obstructive sleep apnea (OSA)-18 quality of life survey and lateral neck X-ray. Also, the assessment of each patients included history, skin prick test or CAP test, and sinus radiography. We compared the OSA-18 survey score and adenoidal-nasopharyngeal (AN) ratio between before and after treatment.ResultsTotal OSA-18 score and AN ratio decreased significantly after treatment regardless of allergy, sinusitis, and obesity (P=0.003, P=0.006). There was no complication after treatment of mometasone furoate.ConclusionPediatric SDB patients with adenoid hypertrophy could be effectively treated with 4-weeks course of mometasone furoate. Allergy, obesity, and sinusitis did not affect on the result of treatment

Evaluation of the multispecimen parallel differential pTRM method: a test on historical lavas from Iceland and Mexico

Accepted versio