scholarly journals The Impact of Limited Time Resolution on the Forward-scattering Polarization in the Solar Sr I 4607 Å Line

2021 ◽  
Vol 909 (2) ◽  
pp. 180
Author(s):  
T. del Pino Alemán ◽  
J. Trujillo Bueno
Keyword(s):  
Time Resolution ◽  
Forward Scattering ◽  
Limited Time ◽  
The Impact

End-user Attitude in ERP Post-Implementation

2012 ◽  
pp. 233-249
Author(s):  
Tiago Almeida ◽  
Leonor Teixeira ◽  
Carlos Ferreira
Keyword(s):  
Success Factors ◽  
End Users ◽  
Limited Time ◽  
End User ◽  
Training Time ◽  
Whole Process ◽  
Critical Success ◽  
Need For Support ◽  
Major Facilitator ◽  
The Impact

This chapter analyzes the impact of the implementation of SAP R/3 in a Multinational Portuguese Organization (MPO), defining some Critical Success Factors (CSFs). In order to understand the motivations of end-users prior to implementation and to analyze the behavior after a change (post-implementation), a study based on a questionnaire was carried out. The sample included 67 users of SAP R/3 that were present throughout the process. Considering the results, the authors conclude that the implementation of SAP R/3 in MPO was successful, and the respondents consider their work more productive and achieve easier access to information. The existence of a solid team to support the project was established as a major facilitator in the whole process, as opposed to the limited time and lack of training that emerged as barriers to the implementation. It was also found that the learning period assumes a high importance in the success of the implementation, since increasing the training time reduces the need for support to the end-users.

scholarly journals Tropical Andes Radar Precipitation Estimates Need High Temporal and Moderate Spatial Resolution

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1038 ◽  
Author(s):  
Mario Guallpa ◽  
Johanna Orellana-Alvear ◽  
Jörg Bendix
Keyword(s):  
Spatial Resolution ◽  
Temporal Resolution ◽  
Time Resolution ◽  
Weather Radar ◽  
Radar Data ◽  
Rain Gauge ◽  
Tropical Andes ◽  
The Andes ◽  
Significant Difference ◽  
The Impact

Weather radar networks are an excellent tool for quantitative precipitation estimation (QPE), due to their high resolution in space and time, particularly in remote mountain areas such as the Tropical Andes. Nevertheless, reduction of the temporal and spatial resolution might severely reduce the quality of QPE. Thus, the main objective of this study was to analyze the impact of spatial and temporal resolutions of radar data on the cumulative QPE. For this, data from the world’s highest X-band weather radar (4450 m a.s.l.), located in the Andes of Ecuador (Paute River basin), and from a rain gauge network were used. Different time resolutions (1, 5, 10, 15, 20, 30, and 60 min) and spatial resolutions (0.5, 0.25, and 0.1 km) were evaluated. An optical flow method was validated for 11 rainfall events (with different features) and applied to enhance the temporal resolution of radar data to 1-min intervals. The results show that 1-min temporal resolution images are able to capture rain event features in detail. The radar–rain gauge correlation decreases considerably when the time resolution increases (r from 0.69 to 0.31, time resolution from 1 to 60 min). No significant difference was found in the rain total volume (3%) calculated with the three spatial resolution data. A spatial resolution of 0.5 km on radar imagery is suitable to quantify rainfall in the Andes Mountains. This study improves knowledge on rainfall spatial distribution in the Ecuadorian Andes, and it will be the basis for future hydrometeorological studies.

Impact of the Wintertime Meteor Showers on the Sporadic E Layer Activity at Midlatitudes

2020 ◽  
Author(s):  
Veronika Barta ◽  
Zbysek Mosna ◽  
Daniel Kouba ◽  
Antal Igaz ◽  
Krisztián Sárneczky
Keyword(s):  
Time Resolution ◽  
Sampling Rate ◽  
Optical Data ◽  
High Time Resolution ◽  
Meteor Showers ◽  
High Sampling Rate ◽  
First Results ◽  
Sporadic E Layer ◽  
Sporadic E ◽  
The Impact

<p>The impact of meteor showers and individual meteors on the ionosphere has been investigated during wintertime meteor showers using synchronised measurements of two DPS-4D Digisondes installed at Pruhonice (50°, 14.5°) and at Sopron (47.63°, 16.72°). Rather short distance between Pruhonice and Sopron allow us to perform special joint campaigns of vertical and oblique sounding under the high sampling rate to detect fine structures within ionospheric plasma.</p><p> </p><p>High cadence campaigns have been performed to observe behavior of sporadic E layer (Es) during the Leonids, Geminids and Quadrantids meteor showers in 2018 and 2019. The time resolution of the ionograms have been set to approximately 0.5 - 2 ionograms per minute. We used vertical and oblique reflections to investigate the fine structure and the movement of Es layer. Based on the first results the oblique sounding is a good technique to detect the Es activity between two stations, however there were periods (typically 10 to 40 minutes of duration) when the Es was observed using oblique trace but there was no observation of Es layer in vertical ionograms. Furthermore, double Es structures have been detected more times for tens of minutes during the observation nights.</p><p> </p><p>Beside the regular behavior of Es we concentrated on observation of intervals of increased plasma frequency in the Es region presumably directly induced by the meteors. In the framework of GINOP-2.3.2-15-2016-00003 (“Kozmikus hatások és kockázatok") an optical camera has been installed at the MTA Széchenyi István Geophysical Observatory (Sopron) in September 2019 with the cooperation of the Konkoly Observatory to monitor the meteors. Therefore, we were able to compare the ionograms measured during meteor showers with the optical data to determine the plasma trails of individual meteors. In the 20-25% of the observed meteors a faint Es layers were detected on the ionograms during and after (< 1 min) the optical record. The direction of the detected plasma traces determined by the SAO Explorer was in good agreement with the direction of the optically observed meteors in most of the cases. Consequently, the plasma trace of individual meteors could be detected on the high time resolution ionograms.</p>

scholarly journals Simulation model for dynamics of three types of annual plants

2016 ◽  
Author(s):  
Andrzej Pękalski
Keyword(s):  
Monte Carlo ◽  
Mean Field ◽  
Observation Time ◽  
Type Model ◽  
Limited Time ◽  
Annual Plants ◽  
Trade Off ◽  
A Site ◽  
The Impact ◽  
Adult Plants

AbstractA Monte Carlo type model describing dynamics of three pairs of annual plants living in a homogeneous habitat is presented and discussed. Each plant follows its own history with growing, fecundity and survival chances determined individually as functions of the plant’s condition and environment. The three plants - Valerianella locusta, Mysotis ramosissima and Cerastium semidecandrum differ by the weight of their seeds, which in the model determines the competition preference. Heavier seeds have a better chance for germination from a site containing seeds of different plants. Better colonisers produce more seeds and disperse them over a larger distance. I show that without absolute asymmetry in the impact effects between better competitors and better colonisers and in a spatially and temporarily homogeneous habitat, coexistence of species is possible, however only in a limited time. This is different from statements coming from models using mean-field type methods. I demonstrate also that in a system of two species clustering of plants of the same type are more frequent. From the calculated survival chances of seedlings and adult plants it follows that elimination of plants occur mostly at the early stages of the plants life cycle, which agrees with the field data.I show that this competition/colonisation trade-off model is sufficient to maintain coexistence and I determine the conditions for dominance of one type of plants. I show that the time of extinction of the weaker species goes down with increasing observation time as a power function with the exponent independent of the type of plants.

scholarly journals Organic molecular markers and signature from wood combustion particles in winter ambient aerosols: aerosol mass spectrometer (AMS) and high time-resolved GC-MS measurements in Augsburg, Germany

2012 ◽  
Vol 12 (2) ◽  
pp. 4831-4866
Author(s):  
M. Elsasser ◽  
M. Crippa ◽  
J. Orasche ◽  
P. F. DeCarlo ◽  
M. Oster ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Time Resolution ◽  
Mass Spectrometric ◽  
High Time ◽  
Charge Ratio ◽  
Wood Combustion ◽  
Ambient Aerosols ◽  
Aerosol Mass Spectrometer ◽  
Aerosol Mass ◽  
The Impact

Abstract. The impact of wood combustion on ambient aerosols was investigated in Augsburg, Germany during a winter measurement campaign of a six-week period. Special attention was paid to the high time resolution observations of wood combustion with different mass spectrometric methods. Here we present and compare the results from an Aerodyne aerosol mass spectrometer (AMS) and gas chromatographic – mass spectrometric (GC-MS) analysed PM1 filters on an hourly basis. This includes source apportionment of the AMS derived organic mass by using positive matrix factorisation (PMF) and analysis of levoglucosan as wood combustion marker, respectively. In the measurement period nitrate and organics are the main contributors to the defined submicron particle mass with 28% and 35%, respectively. To the latter wood combustion organic aerosol (WCOA) contributes 23% on average and 27% in the evening and night-time. Conclusively, wood combustion has a strong influence on the organics and overall aerosol composition. Levoglucosan accounts for 14% of WCOA mass with a higher percentage in comparison to other studies. The ratio between the mass of levoglucosan and organic carbon amounts to 0.06. This study is unique in the one-hour time resolution comparison between the wood combustion results of the AMS and the GC-MS analysed filter method at a PM1 particle size range. This comparison of the concentration courses of the PMF WCOA factor, levoglucosan estimated by the AMS data and the levoglucosan measured by GC-MS is highly correlated, and a detailed discussion on the contributors to the wood combustion marker ion at mass-to-charge ratio 60 will be given. This offers a suitable application possibility for the description of the wood combustion course by the WCOA factor and the levoglucosan concentration estimated by AMS data. However, quantitative description of the levoglucosan concentration estimated by the AMS data is difficult due to the offset of latter compared to measured levoglucosan by the GC-MS.

The effect of sales promotions on consumers’ organic food response

2017 ◽  
Vol 119 (6) ◽  
pp. 1247-1262 ◽  
Author(s):  
Austin Rong-Da Liang ◽  
Wan Yang ◽  
Dun-Ji Chen ◽  
Yu-Fang Chung
Keyword(s):  
Purchase Intention ◽  
Organic Food ◽  
Limited Time ◽  
Sales Promotions ◽  
Content Type ◽  
Food Response ◽  
Food Market ◽  
Food Distributors ◽  
Negative Impacts ◽  
The Impact

Purpose Owing to the wave of consumers concern about food quality, the organic food market has grown rapidly. However, how organic food promotions outweigh the negative impacts of high prices has become a pressing issue scholars need to discuss. Hence, with the value perspective as the basis, the purpose of this paper is to attempt to understand whether or not organic food consumers have preferences for specific promotional programs as opposed to other promotional programs. Design/methodology/approach The two-stage study design was adopted to explore these issues. In the first stage, 225 copies of promotional program documents were collected, and middle-ranking and high-ranking supervisors from seven organic food distributors were interviewed. According to the value perspective, the promotional programs were divided into four types: discount category, member category, free giveaway category, and limited time offer category, which were used to develop the questionnaire questions. In the second stage, 1,017 copies of valid questionnaires were recovered. Findings The logistic regression analysis was adopted to discuss the impact of the various promotional program actions on consumers’ choices. The empirical results indicate that the consumers preferred the programs in the discount category and the free giveaway category, while the programs in the member category and limited time offer category reduced the purchase intention. Originality/value The stringent qualitative and quantitative design in this study shall serve as a reference for follow-up research. The important implications of the operators’ promotion practices are covered in the discussion.

scholarly journals High time resolution and polarization properties of ASKAP-localized fast radio bursts

2020 ◽  
Vol 497 (3) ◽  
pp. 3335-3350 ◽  
Author(s):  
Cherie K Day ◽  
Adam T Deller ◽  
Ryan M Shannon ◽  
Hao Qiu(邱昊) ◽  
Keith W Bannister ◽  
...  
Keyword(s):  
Time Resolution ◽  
Local Environment ◽  
High Time ◽  
Frequency Resolution ◽  
Host Galaxy ◽  
High Time Resolution ◽  
Radio Bursts ◽  
Diverse Range ◽  
Scattering Time ◽  
The Impact

ABSTRACT Combining high time and frequency resolution full-polarization spectra of fast radio bursts (FRBs) with knowledge of their host galaxy properties provides an opportunity to study both the emission mechanism generating them and the impact of their propagation through their local environment, host galaxy, and the intergalactic medium. The Australian Square Kilometre Array Pathfinder (ASKAP) telescope has provided the first ensemble of bursts with this information. In this paper, we present the high time and spectral resolution, full polarization observations of five localized FRBs to complement the results published for the previously studied ASKAP FRB 181112. We find that every FRB is highly polarized, with polarization fractions ranging from 80 to 100 per cent, and that they are generally dominated by linear polarization. While some FRBs in our sample exhibit properties associated with an emerging archetype (i.e. repeating or apparently non-repeating), others exhibit characteristic features of both, implying the existence of a continuum of FRB properties. When examined at high time resolution, we find that all FRBs in our sample have evidence for multiple subcomponents and for scattering at a level greater than expected from the Milky Way. We find no correlation between the diverse range of FRB properties (e.g. scattering time, intrinsic width, and rotation measure) and any global property of their host galaxy. The most heavily scattered bursts reside in the outskirts of their host galaxies, suggesting that the source-local environment rather than the host interstellar medium is likely the dominant origin of the scattering in our sample.

scholarly journals Monitoring the changes to the nutrient composition of fast foods following the introduction of menu labelling in New South Wales, Australia: an observational study

2017 ◽  
Vol 21 (6) ◽  
pp. 1194-1199 ◽  
Author(s):  
Lyndal Wellard-Cole ◽  
David Goldsbury ◽  
Michelle Havill ◽  
Clare Hughes ◽  
Wendy L Watson ◽  
...  
Keyword(s):  
Fast Food ◽  
Energy Content ◽  
New South ◽  
New South Wales ◽  
Food Chains ◽  
Limited Time ◽  
Menu Item ◽  
South Wales ◽  
The Government ◽  
The Impact

AbstractObjectiveThe present study examined the energy (kilojoule) content of Australian fast-food menu items over seven years, before and after introduction of menu board labelling, to determine the impact of the introduction of the legislation.DesignAnalysis of the median energy contents per serving and per 100g of fast-food menu items. Change in energy content of menu items across the years surveyed and differences in energy content of standard and limited-time only menu items were analysed.SettingFive of Australia’s largest fast food chains: Hungry Jack’s, KFC, McDonald’s, Oporto and Red Rooster.SubjectsAll standard and limited-time only menu items available at each fast-food chain, collected annually for seven years, 2009–2015.ResultsAlthough some fast-food chains/menu item categories had significant increases in the energy contents of their menus at some time points during the 7-year period, overall there were no significant or systematic decreases in energy following the introduction of menu labelling (P=0·19 by +17 kJ/100 g, P=0·83 by +8 kJ/serving). Limited-time only items were significantly higher in median energy content per 100 g than standard menu items (+74 kJ/100 g, P=0·002).ConclusionsWhile reformulation across the entire Australian fast-food supply has the potential to positively influence population nutrient intake, the introduction of menu labelling legislation in New South Wales, Australia did not lead to reduced energy contents across the five fast-food chains. To encourage widespread reformulation by the fast-food industry and enhance the impact of labelling legislation, the government should work with industry to set targets for reformulation of nutrient content.

A study on the impact of time resolution in solar data on the performance modelling of CSP plants

2017 ◽  
Vol 109 ◽  
pp. 551-563 ◽  
Author(s):  
Mehdi Aghaei Meybodi ◽  
Lourdes Ramirez Santigosa ◽  
Andrew C. Beath
Keyword(s):  
Time Resolution ◽  
Performance Modelling ◽  
The Impact
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