A new small satellite sunspot triggering recurrent standard- and blowout-coronal jets

In this paper,we report a detailed analysis of recurrent jets originated from a location with emerging, canceling and converging negative magnetic field at the east edge of NOAA active region AR11166 from 2011 March 09 to 10. The event presented several interesting features. First, a satellite sunspot appeared and collided with a pre-existing opposite polarity magnetic field and caused a recurrent solar jet event. Second, the evolution of the jets showed blowout-like nature and standard characteristics. Third, the satellite sunspot exhibited a motion toward southeast of AR11166 and merged with the emerging flux near the opposite polarity sunspot penumbra, which afterward, due to flux convergence and cancellation episodes, caused recurrent jets. Fourth, three of the blowout jets associated with coronal mass ejections (CMEs), were observed from field of view of the Solar Terrestrial Relations Observatory. Fifth, almost all the blowout jet eruptions were accompanied with flares or with more intense brightening in the jet base region, while almost standard jets did not manifest such obvious feature during eruptions. The most important, the blowout jets were inclined to faster and larger scale than the standard jets. The standard jets instead were inclined to relative longer-lasting. The obvious shearing and twisting motions of the magnetic field may be interpreted as due to the shearing and twisting motions for a blowout jet eruption. From the statistical results, about 30% blowout jets directly developed into CMEs. It suggests that the blowout jets and CMEs should have a tight relationship.Comment: ApJ 18 pages, 7 figure

A blowout jet associated with one obvious extreme-ultraviolet wave and one complicated coronal mass ejection event

In this paper, we present a detailed analysis of a coronal blowout jet eruption which was associated with an obvious extreme-ultraviolet (EUV) wave and one complicated coronal mass ejection (CME) event based on the multi-wavelength and multi-view-angle observations from {\sl Solar Dynamics Observatory} and {\sl Solar Terrestrial Relations Observatory}. It is found that the triggering of the blowout jet was due to the emergence and cancellation of magnetic fluxes on the photosphere. During the rising stage of the jet, the EUV wave appeared just ahead of the jet top, lasting about 4 minutes and at a speed of 458 - \speed{762}. In addition, obvious dark material is observed along the EUV jet body, which confirms the observation of a mini-filament eruption at the jet base in the chromosphere. Interestingly, two distinct but overlapped CME structures can be observed in corona together with the eruption of the blowout jet. One is in narrow jet-shape, while the other one is in bubble-shape. The jet-shaped component was unambiguously related with the outwardly running jet itself, while the bubble-like one might either be produced due to the reconstruction of the high coronal fields or by the internal reconnection during the mini-filament ejection according to the double-CME blowout jet model firstly proposed by Shen et al. (2012b), suggesting more observational evidence should be supplied to clear the current ambiguity based on large samples of blowout jets in future studies.Comment: APJ, Accepted October 19, 201

Role of DNA methylation in head and neck cancer

Head and neck cancer (HNC) is a heterogenous and complex entity including diverse anatomical sites and a variety of tumor types displaying unique characteristics and different etilogies. Both environmental and genetic factors play a role in the development of the disease, but the underlying mechanism is still far from clear. Previous studies suggest that alterations in the genes acting in cellular signal pathways may contribute to head and neck carcinogenesis. In cancer, DNA methylation patterns display specific aberrations even in the early and precancerous stages and may confer susceptibility to further genetic or epigenetic changes. Silencing of the genes by hypermethylation or induction of oncogenes by promoter hypomethylation are frequent mechanisms in different types of cancer and achieve increasing diagnostic and therapeutic importance since the changes are reversible. Therefore, methylation analysis may provide promising clinical applications, including the development of new biomarkers and prediction of the therapeutic response or prognosis. In this review, we aimed to analyze the available information indicating a role for the epigenetic changes in HNC

Effect of a Course of Aerobic Exercise and Consumption of Vitamin D Supplementation on Respiratory Indicators in Patients with Asthma

Background and Objectives: Despite the use of exercise therapy in patients with respiratory disease such as asthma, some researchers have emphasized on taking supplementation as a therapeutic approach. The aim of this research was to investigate the effect of a course of aerobic exercise and consumption of vitamin D supplementation (1000 IU) on respiratory indicators of patients with asthma. Methods: This study was designed as a quasi-experimental investigation on a total of 32 female asthmatic patients with a mean age of 20-30 years. Subjects were classified into four eight-person groups: 1- (AT+S) group which had both aerobic training and supplementation consumption; 2- Aerobic training (AT) group that only participated in exercise training; 3- Group (S) that only consumed vitamin D supplementation; 4- Control (C) Group that had neither aerobic training nor supplementation consumption. Statistical analysis was performed by ANOVA and Bonferroni post-hoc test. Significant difference considered as p<0.05. Results: In this study, there was a significant difference in post test (p<0.001) between groups in case of maximum voluntary ventilation (MVV), peak expiratory flow rate (PEF) and maximum expiratory flow at 75% vital capacity (FEF75%) and Maximum expiratory flow between 25% to 75% vital capacity (FEF25%-75%). These indices increased in group AT and AT+S, whereas, they showed decrease in group S and C. Conclusion: Our results indicated that aerobic exercise together with consumption of vitamin D supplementation for 8 weeks could improve the pulmonary function and level of aerobic performance of asthmatic patients and could be considered as a part of pulmonary rehabilitation programs for asthmatic patients

Preliminarily test of physically based models to estimate clear sky emissivity in Tabouk, Saudi Arabia

Available online 14 December 2010Analysis of the performance of physically based models was done using infrared sky temperature observations taken in Tabouk City, North-West Saudi Arabia, during winter 2005. The models used here are the Brutsaert model and the Prata model. Initially, the original coefficients are used, and then, the coefficients are adjusted according to the observed models’ response to the differences between the actual atmospheric vertical structure and the average standard conditions. The produced resulting corrected estimation has reduced the RMSE and MBE values, as compared to those obtained originally. The RMSE and MBE have been reduced from 10.5 and -10 to 3.8 and -1.6, respectively, as the coefficients for the Brutsaert model were adjusted. Similarly, for the Prata model, the RMSE and MBE in the sky temperature values have been reduced from 7.7 C and -7.2 C to 2.9 C and -1.0 C, respectively.A. H. Maghrabi, Z. A. Al-Mostafa, M. N. Kordi and R. W. Cla

Nonexponential decay of Feshbach molecules

We analyze the temporal behavior of the survival probability of an unstable Li6 Feshbach molecule close to the BCS-BEC crossover. We find different instances of nonexponential decay as the magnetic field approaches the resonance value, at which the molecule becomes stable. We observe a transition from an exponential decay towards a regime dominated by a stretched-exponential law

Preliminarily test of physically based models to estimate clear sky emissivity in Tabouk, Saudi Arabia

Available online 14 December 2010Analysis of the performance of physically based models was done using infrared sky temperature observations taken in Tabouk City, North-West Saudi Arabia, during winter 2005. The models used here are the Brutsaert model and the Prata model. Initially, the original coefficients are used, and then, the coefficients are adjusted according to the observed models’ response to the differences between the actual atmospheric vertical structure and the average standard conditions. The produced resulting corrected estimation has reduced the RMSE and MBE values, as compared to those obtained originally. The RMSE and MBE have been reduced from 10.5 and -10 to 3.8 and -1.6, respectively, as the coefficients for the Brutsaert model were adjusted. Similarly, for the Prata model, the RMSE and MBE in the sky temperature values have been reduced from 7.7 C and -7.2 C to 2.9 C and -1.0 C, respectively.A. H. Maghrabi, Z. A. Al-Mostafa, M. N. Kordi and R. W. Cla