oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2018 ( 2 )

2015 ( 1 )

2014 ( 3 )

2013 ( 22 )

Custom range...

Search Results: 1 - 10 of 111 matches for " Teissy;Osaki "
All listed articles are free for downloading (OA Articles)
Page 1 /111
Display every page Item
Temporary management of involutional entropion with octyl-2-cyanoacrylate liquid bandage application
Osaki, Teissy;Osaki, Midori Hentona;Osaki, Tammy Hentona;
Arquivos Brasileiros de Oftalmologia , 2010, DOI: 10.1590/S0004-27492010000200004
Abstract: purpose: to evaluate the use of octyl-2-cyanoacrylate liquid bandage (band-aid liquid?, ethicon, johnson & johnson, new jersey, usa) as a temporary treatment in patients awaiting surgical repair for involutional entropion. methods: thirteen patients (15 eyelids) with involutional entropion were evaluated while they waited for surgical intervention. the lids were repositioned by the application of octyl-2-cyanoacrylate liquid bandage in the malar fold. patients were followed-up at days 1, 7 and 15. assessment and duration of correction were recorded. results: all the patients presented successful correction at day 1, with significant improvements in signs and symptoms. the mean duration of action of the octyl2-cyanoacrylate liquid bandage was three days. no ocular or dermatological reactions were noted. conclusion: octyl-2-cyanoacrylate liquid bandage showed to be a simple, safe and effective option to temporarily treat involutional entropion, while patients waited for surgical intervention.
An Optimal Life Insurance Policy in the Continuous-Time Investment-Consumption Problem  [PDF]
Hideki Iwaki, Yusuke Osaki
Journal of Mathematical Finance (JMF) , 2013, DOI: 10.4236/jmf.2013.32029
Abstract:

This paper considers an optimal life insurance for a household subject to mortality risk. The household receives wage income continuously, which could be terminated by unexpected premature loss of earning power. In order to hedge the risk of losing income stream, the household enters a life insurance contract. The household may also invest their wealth into a financial market. Therefore, the problem is to determine an optimal insurance/investment/consumption strategy. To reflect a real-life situation better, we consider an incomplete market where the household cannot trade insurance contracts continuously. We provide explicit solutions in a fairly general setup.

A disk instability interpretation for the 2001 outburst of Wz sge
Y. Osaki
Revista mexicana de astronomía y astrofísica , 2004,
Abstract: Se discute la explosi on en 2001 de WZ SGE bas andonos en el modelo de inestabilidad t ermica{marea (modelo TTI). Se demuestra que el desarrollo general de la explosi on puede ser entendido a trav es del modelo de inestabilidad del disco y que no se requiere transferencia incrementada de masa para explicar las observaciones.
CENáRIO E TENDêNCIAS PARA AS CULTURAS DE MILHO E SOJA
OSAKI, Mauro
Nucleus , 2009,
Abstract:
Helical Tomography of an Accretion Disk by Superhump Light Curves of the 2001 Outburst of WZ Sagittae
Y. Osaki
Physics , 2003, DOI: 10.1093/pasj/55.4.841
Abstract: A new method for analyzing complex superhump light curves for the 2001 outburst of WZ Sagittae is proposed. The complexity arises because intrinsically time-varying and non-axisymmetric distributions of superhump light sources are coupled with the aspect effects around the binary orbital phase because of its high orbital inclination. The new method can disentangle these complexities by separating the non-axisymmetric spatial distribution in the disk from the time variation with the superhump period. It may be called a helical tomography of an accretion disk because it can reconstruct a series of disk images (i.e., disk's azimuthal structures) at different superhump phases. The power spectral data of superhump light curves of the 2001 outburst of WZ Sge by Patterson et al.(2002,PASP,114,721) are now interpreted under a new light based on the concept of helical tomography, and the azimuthal wave numbers of various frequency modes are identified. In particular, a frequency component, $n\omega_0-\Omega$, where $\omega_0$ and $\Omega$ are the orbital frequency and a low frequency of the apsidal precession of the eccentric disk, is understood as an $(n-1)$-armed traveling wave in the disk. A vigorous excitation of a wave component of $\cos(2\Theta-3\omega_0 t)$ in the first week of the superhump era of WZ Sge, where $\Theta$ is the azimuthal angle, supports Lubow's (1991) theory of non-linear wave coupling of the eccentric Lindblad resonance for the superhump phenomenon. This method can in principle be applied to other SU UMa stars with high orbital inclination if light curves are fully covered over the beat cycle.
TNF Type-I Receptor Inhibitor, R-7050 Attenuates Acute Kidney Injury in a Mouse Model of Crush Syndrome  [PDF]
Shinya Mizuno, Eriko Osaki, Hiroyuki Ohnishi
Pharmacology & Pharmacy (PP) , 2018, DOI: 10.4236/pp.2018.912043
Abstract:
Crush syndrome (CS) is caused by severe and extensive muscular skeletal damages, and acute kidney injury (AKI) with hyperkalemia is one of the most lethal factors of this syndrome. Especially under natural disasters of earthquake, many persons die due to AKI and hyperkalemia-induced cardiac arrest, but there has been no pathogenesis-based drugs for preventing CS-induced AKI. Pro-inflammatory cytokines, such as TNF-α and IL-6, play a critical role for induction of AKI during CS development. Glycerol-injected mice are used as an experimental tool for reflecting pathological events of human CS. Using this popular model, we provide evidence to show that TNF type-I receptor (TNFR1) inhibitor, R-7050 significantly attenuates the onset of AKI after the muscular destruction. In this process, R-7050 treatment suppressed the NF-κB activation in the affected kidney, and this was associated with a decrease in blood IL-6, a downstream target of NF-κB. As a result, renal tubular apoptosis became milder in the R-7050-treated CS mice. These findings suggest that induction of IL-6 via sequential events of TNF-α à TNFR1 à NF-κB is contributable for renal tubular apoptosis, a histological hallmark of AKI. Thus, TNFR1-selective inhibition can be a pharmacological strategy to attenuate the onset of AKI immediately after the clinical manifestation of rhabdomyolysis.
Comparative Risk Aversion under Background Risk Revisited
Masamitsu Ohnishi,Yusuke Osaki
Economics Research International , 2010, DOI: 10.1155/2010/180478
Abstract: This paper determines a new sufficient condition of the (von Neumann-Morgenstern) utility function that preserves comparative risk aversion under background risk. It is the single crossing condition of risk aversion. Because this condition requires monotonicity in the local sense, it may satisfy the U-shaped risk aversion observed in the recent empirical literature.
Comparative Risk Aversion under Background Risk Revisited
Masamitsu Ohnishi,Yusuke Osaki
Economics Research International , 2010, DOI: 10.1155/2010/180478
Abstract: This paper determines a new sufficient condition of the (von Neumann-Morgenstern) utility function that preserves comparative risk aversion under background risk. It is the single crossing condition of risk aversion. Because this condition requires monotonicity in the local sense, it may satisfy the U-shaped risk aversion observed in the recent empirical literature. 1. Introduction Pratt [1] and Arrow [2] introduced the notion of risk aversion and its associated order in the expected utility framework. These are represented by concavity and the degree of concavity of the (von Neumann-Morgenstern) utility function. Comparative risk aversion, which is the order of risk aversion, has intuitive and reasonable properties in many decision-making problems that have appeared in economics and finance. For example, in typical portfolio problems, more risk averse investors hold less risky and more risk-free assets. In this example, investors face single risk. However, it is natural that investors face other risk which cannot traded in asset markets, for example, human capital risk cannot be traded in asset markets. In other situations, we face risk which investors cannot control and trade. This risk is called background risk. Optimal decision problems are rather complex by the presence of background risk. Over the past three decades, many researchers have examined how background risk influences optimal decisions in economics and finance. (Gollier [3] provided an excellent survey of this topic.) Since comparative risk aversion may be different with and without background risk, comparative risk aversion too weal to compare optimal decisions in the presence of background risk. This leads to the following question on this topic: “what conditions guarantee that comparative risk aversion is preserved in the presence of background risk?" This paper provides a new answer to this question. Important contributions to this question are from Kihlstrom et al. [4], Nachman [5], and Pratt [6]. The first two studies obtained a sufficient condition for the preservation of comparative risk aversion in the presence of background risk. As in the case of additive and multiplicative background risk, these sufficient conditions are decreasing absolute risk aversion (DARA) and decreasing relative risk aversion (DRRA), respectively. Pratt [6] established a necessary and sufficient condition for the preservation of comparative risk aversion in the presence of background risk. This paper proposes a new sufficient condition, which is the single crossing condition of risk aversion. The
Is evidence for enhanced mass transfer during dwarf-nova outbursts well substantiated?
Yoji Osaki,Friedrich Meyer
Physics , 2003, DOI: 10.1051/0004-6361:20030115
Abstract: Outburst mechanisms of SU UMa-type dwarf novae are discussed. Two competing models were proposed; a pure disk instability model called the thermal-tidal instability model (TTI model) and the enhanced mass transfer model (EMT model). Observational evidence for enhanced mass transfer from the secondary star during outbursts is critically examined. It is demonstrated that most evidence for enhanced mass transfer is not well substantiated. Patterson et al. (2002) have recently claimed to have found evidence for enhanced mass transfer during the 2001 outburst of WZ Sge. We show that their evidence is probably due to a misinterpretation of their observed light curves. Our theoretical analysis also shows that irradiation during outburst should not affect the mass transfer rate. A refinement of the TTI model is proposed that can explain why superhumps appear a few days after the superoutburst maximum in some SU UMa stars. We present our own interpretation of the overall development of the 2001 outburst of WZ Sge based on the TTI model that does not require the assumption of an unproved enhanced mass transfer.
Study of Superoutbursts and Superhumps in SU UMa Stars by the Kepler Light Curves of V344 Lyrae and V1504 Cygni
Yoji Osaki,Taichi Kato
Physics , 2013, DOI: 10.1093/pasj/65.5.95
Abstract: We have studied the short-cadence Kepler public light curves of SU UMa stars, V344 Lyr and V1504 Cyg extending over a period of more than two years by using power spectral analysis. We determined the orbital period of V344 Lyr to be Porb=0.087903(1) d. We also reanalyzed the frequency variation of the negative superhump in a complete supercycle of V1504 Cyg with additional data of the O-C diagram, confirming that its characteristic variation is in accordance with the thermal-tidal instability model. We present a new two-dimensional period analysis based on a new method of a least absolute shrinkage and selection operator (Lasso). The new method gives very sharp peaks in the power spectra, and it is very useful for studying of the frequency variation in cataclysmic variable stars. We also analyzed simultaneous frequency variations of the positive and negative superhumps. If they are appropriately converted, it is found that they vary in unison, indicating that they represent a disk-radius variation. We have also studied the frequency (or period) variations of positive superhumps during superoutbursts. These variations can be understood in a qualitative way by combining of the disk radius variation and the variation of pressure effects during a superoutburst. A sudden excitation of oscillation with a frequency range near to the negative superhump (which we call "impulsive negative superhump") was observed in the descending branch of several outbursts of V344 Lyr. These events seem to have occurred just prior to the next superoutburst, and to act as a "lead" of the impending superoutburst.
Page 1 /111
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.