81,557 research outputs found
[Pan Am Personnel: J. H. Kroger #2]
No full textPhotograph of J. H. Kroger, Pan American Airways operations personnel, seated in front of a plain background. He looks forward and wears a tweed coat jacket and pants over a vest
[Pan Am Personnel: J. H. Kroger #1]
No full textPhotograph of J. H. Kroger, Pan American Airways operations personnel, seated in front of a plain background. He looks forward with his hands on his lap and wears a tweed coat jacket and pants over a vest
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Downbeat Nystagmus PAN
No full textDownbeat Nystagmus; Periodic Alternating NystagmusBlurred visionThis patient carries a diagnosis of multiple sclerosis.This is a unique patient with multiple sclerosis who has periodic downbeat nystagmus and periodic alternating nystagmus (PAN). The combination of downbeat nystagmus and PAN was first reported in a case of multiple sclerosis by Keane in 1974 (5). It is also reported to occur in the setting of severe hypomagnesemia possibly associated with thiamine deficiency (1). The eye movements show: 1. No nystagmus initially in primary gaze 2. A period of downbeat nystagmus in central gaze 3. A period of PAN 4. No nystagmus on upgaze. Part way through the period of downbeat nystagmus, the direction of the nystagmus changes to a spontaneous horizontal jerk nystagmus present in central gaze, which reverses direction approximately every two minutes - diagnostic of PAN. Periodic Alternating Nystagmus: Because the period of oscillation in one direction is long, about 4 minutes, the diagnosis of PAN may be missed unless the examiner observes the nystagmus for several minutes. As the nystagmus finishes one cycle of right beating nystagmus, a brief transition period occurs during which there may be brief beats of downbeat nystagmus before the next half cycle starts of left beating nystagmus. Although rare, acquired PAN is perhaps the best understood of all forms of nystagmus and was the first for which an effective treatment was identified with the drug baclofen. Convergence can be used to suppress PAN in some patients. Box 10-5 Clinical features of Acquired Periodic Alternating Nystagmus Pg 493(8). The pathogenesis of PAN is due to a lesion of the cerebellar nodulus and uvula. Acquired PAN has been reported in association with a number of conditions. Table 10-4 Etiology of Periodic Alternating Nystagmus Pg 459 (8).Neuroimages were not available in this patient.Lesions of the cerebellar nodulus and uvula.DemyelinationTable 10-4 Etiology of Periodic Alternating Nystagmus Pg459 (8)The GABA-ergic drug, baclofen (30 mg/day), abolishes acquired PAN in most patients, but only helps occasional patients with the congenital form of PAN. This patient was seen prior to the availability of baclofen to treat PAN.1. Du Pasquier R, Vingerhoets F, Safran AB, Landis T. Periodic downbeat nystagmus. Neurology 1998;51:1478-1480. http://www.ncbi.nlm.nih.gov/pubmed/9818889 2. Furman JM, Wall C III, Pang D. Vestibular function in periodic alternating nystagmus. Brain 1990;113:1425-1439. http://www.ncbi.nlm.nih.gov/pubmed/2245304 3. Garbutt S, Thakore N, Rucker JC, Han Y, Kumar AN, Leigh RJ. Effects of visual fixation and convergence in periodic alternating nystagmus due to MS. Neuroophthalmol 2004;28:221-229. 4. Halmagyi GM, Rudge P. Gresty MA, Leigh RJ, Zee DS. Treatment of periodic alternating nystagmus. Ann Neurol 1980; 8:609-611. http://www.ncbi.nlm.nih.gov/pubmed/7212648 5. Jay WM, Williams BB, DeChicchis A. Periodic alternating nystagmus clearing after cataract surgery. J Clin Neuro-ophthalmol 1985;5:149-152. http://www.ncbi.nlm.nih.gov/pubmed/2934414 6. Keane JR. Periodic alternating nystagmus with downward beating nystagmus. Arch Neurol 1974; 30:399-402. http://www.ncbi.nlm.nih.gov/pubmed/4821784 7. Leigh RJ, Robinson DA, Zee DS. A hypothetical explanation for periodic alternating nystagmus: Instability in the optokinetic-vestibular system. Ann N.Y. Acad Sci 1981;374:619-635. http://www.ncbi.nlm.nih.gov/pubmed/6978650 8. Leigh RJ, Zee DS. Diagnosis of Nystagmus and Saccadic Intrusion. Chp 10:475-558. In: The Neurology of Eye Movements, Fourth Edition. Oxford University Press, NY. 2006. 9 . Matsumoto S, Ohyagi Y, Inoue I, Oishi A, Goto H, Nakagawa T, Yamada T, Kira J-I. Periodic alternating nystagmus in a patient with MS. Neurology 2001;56:276-277. http://www.ncbi.nlm.nih.gov/pubmed/1116097
ljt-uiuc/H-k-c: H-k-c
No full textH-k-c package:
Generalized H-k after harmonic correction on receiver functions
a modification of H-k method by Zhu and Kanamori (2000)
by Jiangtao Li, Xiaodong Song, Pan Wang, and Lupei Zhu
Reference: Li, J., Song, X., Wang, P., & Zhu, L. (2019). A generalized H-k method with harmonic corrections on Ps and its crustal multiples in receiver functions. J. Geophys. Res. Solid Earth, 124(4), 3782-3801
Contact: [email protected]; [email protected]
Compressive Sensing for PAN-Sharpening
No full textBased on compressive sensing framework and sparse reconstruction technology, a new pan-sharpening method, named Sparse Fusion of Images (SparseFI, pronounced as sparsify), is proposed in [1]. In this paper, the proposed SparseFI algorithm is validated using UltraCam and WorldView-2 data. Visual and statistic analysis show superior performance of SparseFI compared to the existing conventional pan-sharpening methods in general, i.e. rich in spatial information and less spectral distortion. Moreover, popular quality assessment metrics are employed to explore the dependency on regularization parameters and evaluate the efficiency of various sparse reconstruction toolboxes
Search for h(c) -> pi(+)pi(-) J/psi via psi(3686) -> pi(0)pi(+)pi(-) J/psi
No full textUsing a data sample of 448.1 x 10(6) psi(3686) events collected with the BESIII detector operating at the BEPCII, we perform search for the hadronic transition h(c)-> pi(+)pi(-) J/psi via psi (3686) -> pi(0)hc. No signals of the transition are observed, and the upper limit on the product branching fraction B(sigma(3686) -> pi(0)h(c))B(h(c) -> pi(+)pi(-) J/psi) at the 90% confidence level (C. L.) is determined to be 2.0 x 10(-6). This is the most stringent upper limit to date
Ethanolic extracts of Antrodia cinnamomea mycelia fermented at varied times and scales have differential effects on hepatoma cells and normal primary hepatocytes.
No full textObservation of h(1)(1380) in the J/psi -> eta ' K(K)over-bar pi decay
No full textUsing 1.31 x 10(9) J/psi events collected by the BESIII detector at the BEPCII e(+)e(-) collider, we report the first observation of the h(1)(1380) in J/psi -> eta'h(1)(1380) with a significance of more than ten standard deviations. The mass and width of the possible axial-vector strangeonium candidate h(1)(1380) are measured to be M = (1423.2 +/- 2.1 +/- 7.3) MeV/c(2) and Gamma = (90.3 +/- 9.8 +/- 17.5) MeV. The product branching fractions, assuming no interference, are determined to be B(J/psi -> eta'h(1)(1380)) x B(h(1)(1380) -> K*(892)K-+(-)+c.c.) = (1.51 +/- 0.09 +/- 0.21) x 10(-4) in eta'K+K-pi(0) mode and B(J/psi -> eta'h(1)(1380)) x B(h(1)(1380) -> K*(892)(K) over bar +c.c.) =(2.16 +/- 0.12 +/- 0.29) x 10(-4) in eta'(KSK +/-)-K-0 pi(-/+) mode. The first uncertainties are statistical and the second are systematic. Isospin symmetry violation is observed in the decays h(1)(1380) K*(892)K-+(-) + c.c. and h(1)(1380) -> K*(892)(0)(K) over bar (0) + c.c.. Based on the measured h(1)(1380) mass, the mixing angle between the states h(1)(1170) and h(1)(1380) is determined to be (35.9 +/- 2.6)degrees, consistent with theoretical expectations
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