This Letter presents the results from pointlike neutrino source searches using ten years of IceCube data collected between April 6, 2008 and July 10, 2018. We evaluate the significance of an ...astrophysical signal from a pointlike source looking for an excess of clustered neutrino events with energies typically above ~1 TeV among the background of atmospheric muons and neutrinos. We perform a full-sky scan, a search within a selected source catalog, a catalog population study, and three stacked Galactic catalog searches. The most significant point in the northern hemisphere from scanning the sky is coincident with the Seyfert II galaxy NGC 1068, which was included in the source catalog search. The excess at the coordinates of NGC 1068 is inconsistent with background expectations at the level of 2.9σ after accounting for statistical trials from the entire catalog. The combination of this result along with excesses observed at the coordinates of three other sources, including TXS 0506+056, suggests that, collectively, correlations with sources in the northern catalog are inconsistent with background at 3.3σ significance. The southern catalog is consistent with background. Finally these results, all based on searches for a cumulative neutrino signal integrated over the 10 years of available data, motivate further study of these and similar sources, including time-dependent analyses, multimessenger correlations, and the possibility of stronger evidence with coming upgrades to the detector.
We provide supporting details for the search for a 3+1 sterile neutrino using
data collected over eleven years at the IceCube Neutrino Observatory. The
analysis uses atmospheric muon-flavored ...neutrinos from 0.5 to 100\, TeV that
traverse the Earth to reach the IceCube detector, and finds a best-fit point at
$\sin^2(2\theta_{24}) = 0.16$ and $\Delta m^{2}_{41} = 3.5$ eV$^2$ with a
goodness-of-fit p-value of 12\% and consistency with the null hypothesis of no
oscillations to sterile neutrinos with a p-value of 3.1\%. Several improvements
were made over past analyses, which are reviewed in this article, including
upgrades to the reconstruction and the study of sources of systematic
uncertainty. We provide details of the fit quality and discuss stability tests
that split the data for separate samples, comparing results. We find that the
fits are consistent between split data sets.
This Letter presents the result of a 3+1 sterile neutrino search using 10.7
years of IceCube data. We analyze atmospheric muon neutrinos that traverse the
Earth with energies ranging from 0.5 to 100 ...TeV, incorporating significant
improvements in modeling neutrino flux and detector response compared to
earlier studies. Notably, for the first time, we categorize data into starting
and through-going events, distinguishing neutrino interactions with vertices
inside or outside the instrumented volume, to improve energy resolution. The
best-fit point for a 3+1 model is found to be at $\sin^2(2\theta_{24}) = 0.16$
and $\Delta m^{2}_{41} = 3.5$ eV$^2$, which agrees with previous iterations of
this study. The result is consistent with the null hypothesis of no sterile
neutrinos with a p-value of 3.1\%.
This Letter presents the result of a 3+1 sterile neutrino search using 10.7 years of IceCube data. We analyze atmospheric muon neutrinos that traverse the Earth with energies ranging from 0.5 to 100 ...TeV, incorporating significant improvements in modeling neutrino flux and detector response compared to earlier studies. Notably, for the first time, we categorize data into starting and through-going events, distinguishing neutrino interactions with vertices inside or outside the instrumented volume, to improve energy resolution. The best-fit point for a 3+1 model is found to be at \(\sin^2(2\theta_{24}) = 0.16\) and \(\Delta m^{2}_{41} = 3.5\) eV\(^2\), which agrees with previous iterations of this study. The result is consistent with the null hypothesis of no sterile neutrinos with a p-value of 3.1\%.
We provide supporting details for the search for a 3+1 sterile neutrino using data collected over eleven years at the IceCube Neutrino Observatory. The analysis uses atmospheric muon-flavored ...neutrinos from 0.5 to 100\, TeV that traverse the Earth to reach the IceCube detector, and finds a best-fit point at \(\sin^2(2\theta_{24}) = 0.16\) and \(\Delta m^{2}_{41} = 3.5\) eV\(^2\) with a goodness-of-fit p-value of 12\% and consistency with the null hypothesis of no oscillations to sterile neutrinos with a p-value of 3.1\%. Several improvements were made over past analyses, which are reviewed in this article, including upgrades to the reconstruction and the study of sources of systematic uncertainty. We provide details of the fit quality and discuss stability tests that split the data for separate samples, comparing results. We find that the fits are consistent between split data sets.
Abstract
Within the next 30 years, cities will grow dramatically. Rural areas will become new urban centers, and open spaces will transform into urban cityscapes. Population growth, demolition of ...natural landscapes, and urbanization are fuelling the already imminent threat of climate change. Indigenous structures with their own “critical regionalism” touch on a wide range of cultural, economic, and societal aspects. The authors of this paper examine the possible influence of indigenous vernacular structures and the important regional dependencies in African communities. Paradigm would be the use of materials, typologies, building layouts, urban planning, and ecological concepts as well as the question of the importance of a defined urban image. The paper is based on results derived from interdisciplinary and intercultural collaboration within the framework of the Female Academic Leadership Network for Conscious Engineering and Science towards Sustainable Urbanisation FALCONESS.
Abstract
For functional testing of optical systems, typically Shack‐Hartmann‐based sensors consisting of a combination of a micro lens matrix and a CCD/CMOS sensor are utilized. Their lateral ...resolution is restricted to the size of the micro‐lenses, and the maximum measurable wavefront slope is usually significantly limited to avoid ambiguous signals on the detector. Here, we present a similar measurement method which is, however, based on a digital micro‐mirror matrix for selecting subapertures in reflection. This leads to enhanced measurement capabilities in functional testing of optics.
To evaluate frequency, severity, and correlation of nonmotor symptoms (NMS) with motor complications in fluctuating Parkinson disease (PD).
The Multicenter NonMotor Fluctuations in PD cross-sectional ...study used clinical examination of 10 NMS (dysphagia, anxiety, depression, fatigue, excessive sweating, inner restlessness, pain, concentration/attention, dizziness, bladder urgency) quantified using a visual analogue scale (VAS) in motor-defined on (NMS(On)) and off state (NMS(Off)) combined with motor assessments and self-ratings at home in 100 patients with advanced PD.
All NMS except dysphagia, excessive sweating, and bladder urgency fluctuated in conjunction to motor fluctuations with more frequent and severe symptoms in off compared to on state. The proportions of patients experiencing autonomic/sensory NMS in both motor states were similar to those with these NMS exclusively in off state (ratios 0.4-1.3), while for mental/psychic NMS the proportions with exclusive manifestation in off state were higher (ratios 1.8-3.1). Demographic and clinical characteristics correlated neither with NMS frequency patterns and severities nor with ΔNMS(On/Off) severities (defined as the differences of VAS scores between on and off). Severities of NMS(on), NMS(Off), and ΔNMS(On/Off) did not correlate with motor function. Presence of anxiety, depression, fatigue, and pain had negative impact on health-related quality of life (HRQOL) measured by Parkinson's Disease Questionnaire-8 scoring independent of their occurrence with respect to motor state. Fluctuations of these NMS but not of fatigue deteriorated HRQOL.
Patterns of NMS fluctuations are heterogeneous and complex, but psychic NMS fluctuate more frequently and severely. Demographic parameters and motor function do not correlate with NMS or nonmotor fluctuation severities in fluctuating PD.
Scanning measurement of aspheres Riedel, Jörn; Stürwald, Stephan; Schmitt, Robert
Measurement : journal of the International Measurement Confederation,
20/May , Letnik:
85
Journal Article
Recenzirano
•We show systematic errors from CGH misalignment in asphere measurement.•New proposed setup based on ellipse, laser interferometer and scanning mirrors.•Demonstration of setup control ...mechanism.•Results show that topography measurements are possible.
The measurement of aspheres today is often done using computer generated holograms with interferometry. We show that this method holds some significant systematic errors caused by imperfect adjustment of the optical components. This gives rise to the question if a measurement is possible without utilization of computer generated holograms. Therefore we propose a new elliptical setup using a laser interferometer and a set of scanning mirrors. Our work shows that this setup is capable of form measurement for individual aspheres but still poses some adjustment challenges.
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