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- 저자 : Boddi (검색결과 4 건)
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Boddy, Kimberly K.,Dienes, Keith R.,Kim, Doojin,Kumar, Jason,Park, Jong-Chul,Thomas, Brooks American Physical Society 2017 Physical Review D Vol.95 No.5
<P>Many models currently exist which attempt to interpret the excess of gamma rays emanating from the Galactic Center in terms of annihilating or decaying dark matter. These models typically exhibit a variety of complicated cascade mechanisms for photon production, leading to a nontrivial kinematics which obscures the physics of the underlying dark sector. In this paper, by contrast, we observe that the spectrum of the gamma-ray excess may actually exhibit an intriguing 'energy-duality' invariance under E-gamma -> E-*(2)/E-gamma. for some E-*. As we shall discuss, such an energy duality points back to a remarkably simple alternative kinematics which in turn is realized naturally within the Dynamical Dark Matter framework. Observation of this energy duality could therefore provide considerable information about the properties of the dark sector from which the Galactic Center gamma-ray excess might arise, and highlights the importance of acquiring more complete data for the Galactic Center excess in the energy range around 1 GeV.</P>
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Lines and boxes: Unmasking Dynamical Dark Matter through correlations in the MeV gamma-ray spectrum
Boddy, Kimberly K.,Dienes, Keith R.,Kim, Doojin,Kumar, Jason,Park, Jong-Chul,Thomas, Brooks American Physical Society 2016 Physical review. D Vol.94 No.9
<P>Identifying signatures of dark matter at indirect-detection experiments is generally more challenging for scenarios involving nonminimal dark sectors such as Dynamical Dark Matter (DDM) than for scenarios involving a single dark particle. This additional difficulty arises because the partitioning of the total dark-matter abundance across an ensemble of different constituent particles with different masses tends to 'smear' the injection spectra of photons and other cosmic-ray particles that are produced via dark-matter annihilation or decay. As a result, the imprints of the dark sector on these cosmic-ray flux spectra typically take the form of continuum features rather than sharp peaks or lines. In this paper, however, we identify an unambiguous signature of nonminimal dark sectors such as DDM which can overcome these issues and potentially be observed at gamma-ray telescopes operating in the MeV range. We discuss the specific situations in which this signature can arise, and demonstrate that this signature can be exploited in order to significantly enhance our ability to resolve the unique spectral features of DDM and other nonminimal dark sectors at future gamma-ray facilities.</P>
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Tommaso Cai,Sandra Mazzoli,Francesca Meacci,Vieri Boddi,Nicola Mondaini,Gianni Malossini,Riccardo Bartoletti 한국미생물학회 2011 The journal of microbiology Vol.49 No.3
Chronic bacterial prostatitis (CBP) is, usually, caused by uropathogens, especially gram-negative bacilli,although infection is sometimes due to Gram-positive and atypical microorganisms. A recent increasing in prevalence of Gram-positive strains has been reported. The aim of this study was to explore the epidemiological features and resistance rates in uropathogens isolated from CBP outpatients in last 10 years. All consecutive outpatients with demonstrated CBP attending a single Sexually Transmitted Disease centre from January 1997 and December 2008, were enrolled and underwent microbiological cultures in first void early morning urine, midstream urine, expressed prostatic secretion, and post prostate massage urine. Prevalence of different bacterial strains was stratified in four different periods: 1997-1999, 2000-2002, 2003-2005, 2006-2008. Any changes observed in epidemiological features and resistance rates in uropathogens over the whole study period have been analyzed. The present study has been planned, thus, as in vitro study. From 6,221patients, 4,601 Gram-positive and 1,620 Gram-negative bacterial strains have been isolated. Enterococcus faecalis and Escherichia coli strains are the first and second frequent pathogens found, respectively. Significant differences between E. faecalis prevalence in the 1997-1999 and 2006-2008 periods were found. E. coli showed a significant difference between prevalence in 1997-1999 and 2006-2008 periods. Gram-positive organisms showed a decreasing of susceptibility to ciprofloxacin as well as Gram-negative strains, while a good susceptibility to the levofloxacin was evidenced. E. faecalis prevalence seemed to be raised in 2006-2008periods. Moreover, a decreasing of activity of ciprofloxacin and a good activity profile of levofloxacin have been reported.
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Yoga for menopausal symptoms: a systematic review
Lee, Myeong Soo,Kim, Jong-In,Ha, Jeong Yong,Boddy, Kate,Ernst, Edzard The North American Menopause Society 2009 Menopause Vol.16 No.3
OBJECTIVE:: The aim of this study was to assess the effectiveness of yoga as a treatment option for menopausal symptoms. METHODS:: We searched the literature using 14 databases from their inception to July 2008 and included all types of clinical studies regardless of their design. The methodological quality of all studies was assessed using a modified Jadad score. RESULTS:: Seven studies met our inclusion criteria. Two randomized clinical trials compared the effects of yoga with those of walking or physical exercise. The meta-analysis of these data failed to show specific effects of yoga on menopausal complaints including psychological, somatic, and vasomotor symptoms. Two randomized clinical trials found no effects of yoga on total menopausal symptoms compared with wait-list control or no treatment. The remaining studies were either non-randomized (n = 1) or uncontrolled clinical trials (n = 3). They reported favorable effects of yoga on menopausal symptoms. These data collectively show that the results of rigorous studies of the effects of yoga for menopausal symptoms are unconvincing. CONCLUSION:: The evidence is insufficient to suggest that yoga is an effective intervention for menopause. Further research is required to investigate whether there are specific benefits of yoga for treating menopausal symptoms.
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