129 research outputs found
Emergence of Quintet Superfluidity in the Chain of Partially Polarized Spin-3/2 Ultracold Atom
The system of ultracold atoms with hyperfine spin might be unstable
against the formation of quintet pairs if the interaction is attractive in the
quintet channel. We have investigated the behavior of correlation functions in
a model including only s-wave interactions at quarter filling by large-scale
density-matrix renormalization-group simulations. We show that the correlations
of quintet pairs become quasi-long-ranged, when the system is partially
polarized, leading to the emergence of various mixed superfluid phases in which
BCS-like pairs carrying different magnetic moment coexist.Comment: 4 pages, 4 figures; significantly rewritten compared to the first
versio
Charged particle display
An optical shutter based on charged particles is presented. The output light
intensity of the proposed device has an intrinsic dependence on the
interparticle spacing between charged particles, which can be controlled by
varying voltages applied to the control electrodes. The interparticle spacing
between charged particles can be varied continuously and this opens up the
possibility of particle based displays with continuous grayscale.Comment: typographic errors corrected in Eqs (37) and (39); published in
Journal of Applied Physics; doi:10.1063/1.317648
Insulating charge density wave for a half-filled SU(N) Hubbard model with an attractive on-site interaction in one dimension
We study a one-dimensional SU(N) Hubbard model with an attractive on-site
interaction and at half-filling on the bipartite lattice using
density-matrix renormalization-group method and a perturbation theory. We find
that the ground state of the SU(N) Hubbard model is a charge density wave state
with two-fold degeneracy. All the excitations are found to be gapful, resulting
in an insulating ground state, on contrary to that in the SU(2) case. Moreover,
the charge gap is equal to the Cooperon gap, which behaves as
in the strong coupling regime. However, the spin gap and the
quasiparticle gap as well open exponentially in the weak coupling
region, while in the strong coupling region, they linearly depend on such
that and .Comment: 7 pages, 7 figure
Altered state of corporal consciousness related to alien hand syndrome and schizophrenic motor passivity
Properties of excitations in systems with a spinor Bose-Einstein condensate
General theory in case of homogenous Bose-Einstein condensed systems with
spinor condensate is presented for the correlation functions of density and
spin fluctuations and for the one-particle propagators as well. The random
phase approximation is investigated and the damping of the modes is given in
the intermediate temperature region. It is shown that the collective and the
one-particle excitation spectra do not coincide fully.Comment: 5 pages, 1 figur
Halláscsökkenést okozó etiológiai tényezők cochleáris implantáción átesett gyerekeknél
Absztrakt:
Bevezetés: Veleszületett halláscsökkenés 1000 újszülöttből 1–3
esetben fordul elő. A gyermekkori súlyos fokú percepciós halláscsökkenés
hátterében számos ok szerepelhet. Az esetek döntő százalékában genetikai eredet
valószínűsíthető, de emellett lehet infekció, fejlődési rendellenesség és egyéb
szerzett megbetegedések is. Célkitűzés: Célunk volt a
Semmelweis Egyetem Fül-, Orr-, Gégészeti és Fej-, Nyaksebészeti Klinikáján a 18
év alatti, cochlearis implantáción átesett betegek között az etiológiai tényezők
előfordulási arányának felmérése. Módszer és eredmények: A
halláscsökkenés okát betegeink 62,9%-ában meg tudtuk határozni. A leggyakoribb
etiológia a gap junction protein β-2 gén c.35delG patogén
mutációja, mely a vizsgált populációban 38,8%-os allélfrekvenciát mutatott.
Emellett az infektív eredet (10,1%), a meningitishez, illetve a
cytomegalovirusfertőzéshez társuló halláscsökkenés fordult elő nagyobb
százalékban. Betegeink 79,7%-a részesült a beszédfejlődés lezáródását megelőzően
műtéti rehabilitációban, a veleszületett halláscsökkent gyermekek 11,2%-a
azonban továbbra is későn diagnosztizált eset volt.
Következtetés: Eredményeink alapján elmondható, hogy a
gyermekkori súlyos fokú halláscsökkenés esetén fontos a genetikai eredet
tisztázása. Az időben megkezdett rehabilitáció a gyermek egész életére hatással
van, késői implantáció esetén a gyermek beszédfejlődése jelentősen elmarad. A
késői implantációk magas aránya a 2015-ben bevezetett új újszülöttkori
hallásszűrés-protokollal, valamint az orvoskollégák megfelelő tájékoztatásával
és a betegeknek a megfelelő centrumba történő irányításával várhatóan
csökkenthető. Orv Hetil. 2019; 160(21): 822–828.
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Abstract:
Introduction: Congenital sensorineural hearing loss is one of
the most common sensory defects affecting 1–3 children per 1000 newborns. There
are a lot of causes which result in congenital hearing loss, the most common is
the genetic origin, but infection, cochlear malformation or other acquired
causes can be reasons as well. Aim: The aim of this study was
to establish the etiological factors of congenital profound sensorineural
hearing loss in children who underwent cochlear implantation.
Results: Our results show that the origin of the hearing
loss was discovered in 62.9% of our patients. The most common etiological factor
was the c.35delG mutation of the gap junction protein β-2 gene,
the allele frequency was 38.7% in our cohort. Infection constituted to 10.1%,
and meningitis and cytomegalovirus infection were the second most common cause.
79.9% of our patients received sufficient hearing rehabilitation before the end
of the speech development’s period (6 years old), but 11.2% of our cases were
still diagnosed late. Conclusions: Based on our data we can
state that genetic evaluation is crucial in the diagnostic process of congenital
profound sensorineural hearing loss. Sufficient hearing rehabilitation affects
the whole life of the child, and by late cochlear implantation the speech
development falls behind. We can decrease the ratio of the late implantation
with the new protocol of newborn hearing screening, and with sufficient
information provided to the colleagues, so the children may be referred to the
proper center for rehabilitation without delay. Orv Hetil. 2019; 160(21):
822–828
A globális éghajlatváltozás: hazai hatások és válaszok. A magyarországi klímapolitika alapjai.
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