scholarly journals Current Status of the LOFAR EoR Key Science Project

2017 ◽  
Vol 12 (S333) ◽  
pp. 71-76 ◽  
Author(s):  
L. V. E. Koopmans
Keyword(s):  
Power Spectrum ◽  
Data Processing ◽  
Data Acquisition ◽  
Neutral Hydrogen ◽  
Final Analysis ◽  
Current Status ◽  
Science Project ◽  
X Ray ◽  
The Future ◽  
Future Potential

AbstractA short status update on the LOFAR Epoch of Reionization (EoR) Key Science Project (KSP) is given, regarding data acquisition, data processing and analysis, and current power-spectrum limits on the redshifted 21-cm signal of neutral hydrogen at redshiftsz= 8 − 10. With caution, we present a preliminary astrophysical analysis of ∼60 hr of processed LOFAR data and their resulting power spectrum, showing that potentially already interesting limits on X-ray heating during the Cosmic Dawn can already be gained. This is by no means the final analysis of this sub-set of data, but illustrates the future potential when all nearly 3000 hr of data in hand on two EoR windows will have been processed.

scholarly journals Past, present and future of thermal gasification of biomass and waste

2020 ◽  
pp. 5-20
Author(s):  
Jitka Hrbek
Keyword(s):  
The Netherlands ◽  
Coal Gasification ◽  
Current Status ◽  
The Past ◽  
The Future ◽  
Future Potential ◽  
Waste Gasification

The thermal gasification has been used for nearly 200 years. At the beginning coal or peat were used as a feedstock to produce gas for cooking and lighting. Nowadays, the coal gasification is still actual, anyway, in times without fossils the biomass and waste gasification becomes more important. In this paper, the past, present and future of the biomass and waste gasification (BWG) is discussed. The current status of BWG in Austria, Denmark, Germany, Italy, the Netherlands, Sweden and USA is detailed described and the future potential of the technology is outlined.

scholarly journals Probing the high-z IGM with the hyperfine transition of 3He+

2020 ◽  
Vol 497 (1) ◽  
pp. 572-580 ◽  
Author(s):  
Shivan Khullar ◽  
Qingbo Ma ◽  
Philipp Busch ◽  
Benedetta Ciardi ◽  
Marius B Eide ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Signal To Noise Ratio ◽  
Neutral Hydrogen ◽  
Noise Power ◽  
Large Collection ◽  
X Ray ◽  
Hyperfine Transition ◽  
The One ◽  
X Ray Binaries ◽  
Insight Into

ABSTRACT The hyperfine transition of 3He+ at 3.5 cm has been thought as a probe of the high-z IGM, since it offers a unique insight into the evolution of the helium component of the gas, as well as potentially give an independent constraint on the 21 cm signal from neutral hydrogen. In this paper, we use radiative transfer simulations of reionization driven by sources such as stars, X-ray binaries, accreting black holes and shock heated interstellar medium, and simulations of a high-z quasar to characterize the signal and analyse its prospects of detection. We find that the peak of the signal lies in the range ∼1–50 μK for both environments, but while around the quasar it is always in emission, in the case of cosmic reionization a brief period of absorption is expected. As the evolution of He ii is determined by stars, we find that it is not possible to distinguish reionization histories driven by more energetic sources. On the other hand, while a bright QSO produces a signal in 21 cm that is very similar to the one from a large collection of galaxies, its signature in 3.5 cm is very peculiar and could be a powerful probe to identify the presence of the QSO. We analyse the prospects of the signal’s detectability using SKA1-mid as our reference telescope. We find that the noise power spectrum dominates over the power spectrum of the signal, although a modest signal-to-noise ratio can be obtained when the wavenumber bin width and the survey volume are sufficiently large.

Experimental Methods in Applied Mechanics

1983 ◽  
Vol 50 (4b) ◽  
pp. 963-976 ◽  
Author(s):  
I. M. Daniel
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Full Advantage ◽  
Experimental Methods ◽  
Experimental Mechanics ◽  
Current Status ◽  
Strain Gages ◽  
Applied Mechanics ◽  
Technological Advances ◽  
Recent Developments

An overview is presented of recent developments and the current status of several experimental mechanics methods, i.e., strain gages, moire´, photoelasticity, and interferometry. Examples of applications of these methods are given. Progress has been noted in all aspects, including methodology, data acquisition instrumentation, data processing, and range of applications. The trend is to tackle more difficult problems and to take full advantage of technological advances.

A Review of Methodologies Used for Fault Diagnosis of Gearbox

2013 ◽  
Vol 415 ◽  
pp. 510-514
Author(s):  
Zhen Yu Han ◽  
Yu Long Liu ◽  
Hong Yu Jin ◽  
Hong Ya Fu
Keyword(s):  
Fault Diagnosis ◽  
Data Processing ◽  
Data Acquisition ◽  
Features Extraction ◽  
Entire Process ◽  
Mode Detection ◽  
Fault Recognition ◽  
The Future ◽  
Rolling Elements ◽  
Fault Mode

A review of methods used for fault recognition of the rolling elements in gearbox, namely gear and bearing, is presented in this paper. The procedure of the fault recognition can be classified into three phases, which are data acquisition, data processing or important features extraction, and the fault mode detection. Many different methods have been developed in dealing with each phase, so that the arrangement of the entire process has different strategies. This paper summarizes some general used and recently popular developed methods of each phase, and makes comparison between them. This work also aims at giving a perspective in such area in the future, based on the known researches.

Synthetic diamonds produce pressure of 125 GPa (1.25 Mbar)

1987 ◽  
Vol 2 (5) ◽  
pp. 614-618 ◽  
Author(s):  
Arthur L. Ruoff ◽  
Samuel T. Weir ◽  
Keith E. Brister ◽  
Yogesh K. Vohra
Keyword(s):  
Diamond Anvil Cell ◽  
Optical Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthetic Diamonds ◽  
The Future ◽  
Diamond Anvil ◽  
Future Potential ◽  
Sample Pressure

Synthetic gray-blue diamonds were used as anvils in a diamond anvil cell to produce a pressure of 125 GPa (1.25 Mbar) in a gasketed sample. Pressure was measured by x-ray diffraction methods by using gold and iron as a calibrant and also by optical methods based on the shift of the fluorescence peaks of ruby with pressure. The future potential of synthetic diamonds for ultrapressure research is discussed.

scholarly journals Cosmology with Thermal Sunyaev Zeldovich Power Spectrum and Cluster Counts: Consistency, Tensions and Prospects

2020 ◽  
Vol 228 ◽  
pp. 00005
Author(s):  
Boris Bolliet
Keyword(s):  
Power Spectrum ◽  
Current Status ◽  
Apparent Discrepancy ◽  
X Ray ◽  
Galaxy Surveys ◽  
Cosmological Constraints ◽  
Mass Bias ◽  
Spectrum Measurements ◽  
Massive Neutrinos

In this proceeding I summarise the current status of cosmological constraints obtained from current SZ data, focusing on the Planck thermal SZ power spectrum and cluster counts. I discuss the consistency between Planck SZ data and other SZ cluster or galaxy surveys as well as the apparent discrepancy between SZ and CMB for the amplitude of matter clustering σ8. Finally I discuss forecasted constraints on massive neutrinos and the X-ray mass bias in the context of future SZ power spectrum measurements.

Current Status of Solid-State X-Ray Systems

1985 ◽  
Vol 43 ◽  
pp. 158-161
Author(s):  
Martin Peckerar ◽  
Anastasios Tousimis
Keyword(s):  
Solid State ◽  
Electric Fields ◽  
Spectral Lines ◽  
Current Status ◽  
Mobile Charge ◽  
Electron Hole ◽  
X Ray ◽  
Sensing Systems ◽  
Transmission Electron ◽  
Electron Microscopes

Solid state x-ray sensing systems have been used for many years in conjunction with scanning and transmission electron microscopes. Such systems conveniently provide users with elemental area maps and quantitative chemical analyses of samples. Improvements on these tools are currently sought in the following areas: sensitivity at longer and shorter x-ray wavelengths and minimization of noise-broadening of spectral lines. In this paper, we review basic limitations and recent advances in each of these areas. Throughout the review, we emphasize the systems nature of the problem. That is. limitations exist not only in the sensor elements but also in the preamplifier/amplifier chain and in the interfaces between these components.Solid state x-ray sensors usually function by way of incident photons creating electron-hole pairs in semiconductor material. This radiation-produced mobile charge is swept into external circuitry by electric fields in the semiconductor bulk.

Nonmuscle-Invasive Bladder Cancer: What's Changing and What has Changed

2017 ◽  
Vol 84 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Ramanitharan Manikandan ◽  
Oscar Rodriguez ◽  
Rubén Parada ◽  
Joan Palou Redorta
Keyword(s):  
Bladder Cancer ◽  
Best Practice ◽  
Disease Recurrence ◽  
Invasive Bladder Cancer ◽  
Current Status ◽  
Optimal Care ◽  
Medline Search ◽  
Select Group ◽  
The Future ◽  
Nonmuscle Invasive Bladder Cancer

Purpose Nonmuscle-invasive bladder cancer (NMIBC) is a challenging disease to manage primarily due to its varied clinical course. The management of NMIBC has witnessed a widespread change with respect to its diagnosis and treatment. Although transurethral resection (TUR) and adjuvant bacillus Calmette–Guerin (BCG) stills remain the cornerstone, newer protocols has come into vogue to achieve optimal care. On the basis of a literature review, we aimed to establish ‘what changes has already occurred and what is expected in the future’ in NMIBC. Methods A Medline search was performed to identify the published literature with respect to diagnosis, treatment and future perspectives on NMIBC. Particular emphasis was directed to determinants such as the quality of TUR and the newer modifications, Re-TUR, current status of newer macroscopic and microscopic imaging, role of urinary biomarkers, clinical, histologic and molecular predictors of high-risk disease, administration of intravesical agents, salvage therapy in BCG recurrence and the current best practice guidelines were analyzed. Results and Conclusions Optimal TUR, restaging in select group, incorporation of newer endoscopic imaging and judicious administration of intravesical chemo-immunotherapeutic agents can contribute to better patient care. Although there is a plethora of urinary markers, there is insufficient evidence for their use in isolation. The future probably lies in identification of genetic markers to determine disease recurrence, nonresponders to standard treatment and early institution of alternative/targeted therapy.

Sign in / Sign up

Export Citation Format

Share Document