1,689 research outputs found

    Expert opinion on pre and post procedure care in aesthetic dermatology

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    In clinical practice, the number of aesthetic dermatology procedures carried out in India is increasing. Nonsurgical or minimally invasive cosmetic dermatology encompasses a variety of procedures, such as chemical peels, laser therapies, dermal fillers, derma rollers and microneedling radiofrequency, which are known to be safe and effective. Despite enormous advances in the field of aesthetic dermatological procedures, many clinicians seem to have limited knowledge about the potential benefits and risks associated with aesthetic procedures. To ensure successful outcome of an aesthetic procedure and to minimise complications, one should be aware of the pre- and post-procedural care involved. This review summarized expert opinion on pre and post-procedural care needed with chemical peels, laser therapies, dermal fillers, derma rollers and microneedling radiofrequency

    Disk-Jet Connection in Cygnus X-3

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    We present the results of a detailed correlation study between the soft X-ray, hard X-ray, and radio emission (obtained from RXTE ASM, BATSE, and GBI observations, respectively) of the bright radio emitting Galactic X-ray binary Cygnus X-3. We detect a very strong positive correlation between the soft X-ray and radio emission during the low-hard and minor flaring periods of the source, and an anti-correlation between the soft and hard X-ray emissions. We present statistical arguments to suggest that the anti-correlation between the radio and hard X-ray emission, reported earlier, is primarily due to their correlation and anti-correlation, respectively, with the soft X-ray emission. We make a wide band X-ray spectral study using the pointed RXTE observations and detect a pivotal behaviour in the X-ray spectrum. We argue that this X-ray spectral pivoting is responsible for the anti-correlation between the soft and hard X-ray emissions. The strong correlation between the soft X-ray and radio emission suggests a close link between the accreting mechanism, plasma cloud surrounding the compact object and the radio emission.Comment: Accepted in A&A Letters. Major revioson of discussion, minor revision of tables and figure

    Suzaku Observations of the Black Hole H1743-322 in Outburst

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    We observed the Galactic black hole candidate H1743-322 with Suzaku for approximately 32 ksec, while the source was in a low/hard state during its 2008 outburst. We collected and analyzed the data with the HXD/PIN, HXD/GSO and XIS cameras spanning the energy range from 0.7-200 keV. Fits to the spectra with simple models fail to detect narrow Fe XXV and Fe XXVI absorption lines, with 90% confidence upper limits of 3.5 eV and 2.5 eV on the equivalent width, respectively. These limits are commensurate with those in the very high state, but are well below the equivalent widths of lines detected in the high/soft state, suggesting that disk winds are partially state-dependent. We discuss these results in the context of previous detections of ionized Fe absorption lines in H1743-322 and connections to winds and jets in accreting systems. Additionally, we report the possible detection of disk reflection features, including an Fe K emission line.Comment: 16 pages, 4 figures, 4 tables. Accepted for publication in ApJ

    Study of the Largest Multiwavelength Campaign of the Microquasar GRS 1915+105

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    We present the results from a multiwavelength campaign of GRS 1915+105 performed from 2000 April 16 to 25. This is one of the largest coordinated set of observations ever performed for this source, covering the wide energy band in radio (13.3-0.3 cm), near-infrared (J-H-K), X-rays and Gamma-rays (from 1 keV to 10 MeV). During the campaign GRS 1915+105 was predominantly in the "plateau" (or low/hard) state but sometimes showed soft X-ray oscillations: before April 20.3, rapid, quasi-periodic (~= 45 min) flare-dip cycles were observed. The radio flares observed on April 17 shows frequency- dependent peak delay, consistent with an expansion of synchrotron-emitting region starting at the transition from the hard-dip to the soft-flare states in X-rays. On the other hand, infrared flares on April 20 appear to follow (or precede) the beginning of X-ray oscillations with an inconstant time delay of ~= 5-30 min. This implies that the infrared emitting region is located far from the black hole by >~ 10E13 cm, while its size is <~ 10E12 cm constrained from the time variability. We find a good correlation between the quasi-steady flux level in the near-infrared band and in the X-ray band. From this we estimate that the reprocessing of X-rays, probably occurring in the outer parts of the accretion disk, accounts for about 20-30% of the observed K magnitude in the plateau state. The OSSE spectrum in the 0.05-10 MeV band is represented by a single power law with a photon index of 3.1 extending to ~1 MeV with no cutoff. The power-law slope above ~30 keV is found to be very similar between different states in spite of large flux variations in soft X-rays, implying that the electron energy distribution is not affected by the change of the state in the accretion disk.Comment: 31 pages, 11 figures. Accepted for publication in ApJ, vol. 571, 2002. Minor corrections. Figure 2 is revised (numbers on the top axis are corrected). References are update

    The first resolved imaging of milliarcsecond-scale jets in Circinus X-1

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    We present the first resolved imaging of the milliarcsecond-scale jets in the neutron star X-ray binary Circinus X-1, made using the Australian Long Baseline Array. The angular extent of the resolved jets is ~20 milliarcseconds, corresponding to a physical scale of ~150 au at the assumed distance of 7.8 kpc. The jet position angle is relatively consistent with previous arcsecond-scale imaging with the Australia Telescope Compact Array. The radio emission is symmetric about the peak, and is unresolved along the minor axis, constraining the opening angle to be less than 20 degrees. We observe evidence for outward motion of the components between the two halves of the observation. Constraints on the proper motion of the radio-emitting components suggest that they are only mildly relativistic, although we cannot definitively rule out the presence of the unseen, ultra-relativistic (Lorentz factor >15) flow previously inferred to exist in this system.Comment: Accepted for publication in MNRAS Letters. 6 pages, 4 figure

    Palm Oil Industry Competitiveness between Indonesia and Malaysia——Based on Generalized Double Diamond Model

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    目前,棕榈油已经成为全球需求最大的油脂,同时,它作为替代生物燃料也渐渐成为很多国家的战略资源。印尼和马来西亚共同主宰全球棕榈油市场,两国棕榈油的产出对世界食用油和生物燃料市场有巨大影响。因此,研究印尼、马来西亚棕榈油产业竞争力有重要的现实意义。 本文首先运用一般化双钻石模型对印尼、马来西亚棕榈油产业竞争力进行分析。首先通过对生产要素、国内外市场需求条件、相关及支持产业、企业结构,企业战略四个基本要素以及机遇和政府两个机动要素进行全面比较,接着从实证角度出发,运用显示比较优势指数和恒定市场份额两个指标对印尼、马来西亚棕榈油产业竞争力进行比较分析,最后进行总结。本文的主要观点如下: 第一、印尼...At present, palm oil has become the largest global edible oil. Meanwhile, as an alternative bio-fuel, it also gradually becomes the strategic resource in many countries. Both Indonesia and Malaysia dominate the global palm oil market. The output and structure of palm oil in these two countries have a huge impact on the global palm oil market. Therefore, it’s important to study the palm oil indust...学位:经济学硕士院系专业:南洋研究院_世界经济学号:2552008115226
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