Selection of the most adequate frequency model to estimate the flood extreme values in the North West of Algeria

2019 ◽  
Vol 9 (5) ◽  
pp. 474
Author(s):  
Aziz Hebal
Keyword(s):  
Extreme Values ◽  
Frequency Model ◽  
North West ◽  
The North ◽  
Selection Of

Evaluation of trends in extreme temperatures simulated by HighResMIP models across Europe

2020 ◽  
Author(s):  
Gerard van der Schrier ◽  
Antonello Squintu ◽  
Else van den Besselaar ◽  
Eveline van der Linden ◽  
Enrico Scoccimarro ◽  
...  
Keyword(s):  
High Resolution ◽  
Western Europe ◽  
Extreme Values ◽  
Maximum Temperature ◽  
Western Balkans ◽  
North West ◽  
The Balkans ◽  
The North ◽  
Summer Maximum ◽  
Maximum Temperatures

<p>The comparison of simulated climate with observed daily values allows to assess their reliability and the soundness of their projections on the climate of the future. Frequency and amplitude of extreme events are fundamental aspects that climate simulations need to reproduce. In this work six models developed within the High Resolution Model Intercomparison Project are compared over Europe with the homogenized version of the observational E-OBS gridded dataset. This is done by comparing averages, extremes and trends of the simulated summer maximum temperature and winter minimum temperatures with the observed ones.</p><p>Extreme values have been analyzed making use of indices based on the exceedances of percentile-based thresholds. Winter minimum temperatures are generally underestimated by models in their averages (down to -4 deg. C of difference over Italy and Norway) while simulated trends in averages and extreme values are found to be too warm on western Europe and too cold on eastern Europe (e.g. up to a difference of -4% per decade on the number of Cold Nights over Spain). On the other hand the models tend to underestimate summer maximum temperatures averages in Northern Europe and overestimate them in the Mediterranean areas (up to +5 deg. C over the Balkans). The simulated trends are too warm on the North West part and too cold on the South East part of Europe (down to -3%/dec. on the number of Warm Days over Italy and Western Balkans).</p><p>These results corroborate the findings of previous studies about the underestimation of the warming trends of summer temperatures in Southern Europe, where these are more intense and have more impacts.  A comparison of the high resolution models  with the corresponding version in CMIP5 has been performed comparing the absolute biases of extreme values trends. This has shown a slight improvement for the simulation of winter minimum temperatures, while no signs of significant progresses have been found for summer maximum temperatures.</p>

Reliance Upon a Toxic Staple Crop

2017 ◽  
Author(s):  
Warren Wilson ◽  
Darna L. Dufour
Keyword(s):  
Artificial Selection ◽  
Agricultural Practices ◽  
North West ◽  
The North ◽  
Variety Selection ◽  
Salient Factor ◽  
Staple Crop ◽  
Selection Of

In Amazonia most indigenous horticulturists prefer to cultivate the more toxic forms of manioc as a staple crop, despite the increased processing required to render them safe for consumption. This phenomenon has long intrigued anthropologists. In this chapter we describe the agricultural practices of the Tukanoan Indians in the North-west Amazon and explore their reliance on toxic varieties of manioc from agronomic, ecological, organoleptic, and ethnographic perspectives. Our findings indicate that the puzzling preference for a toxic staple crop may be explained by the higher yields produced by the more toxic forms, and also that the most salient factor in variety selection by Tukanoan women is the food into which the roots will be made. This suggests a multifaceted explanation. Moreover, we propose that present-day lack of concern about yield is a recent luxury due to artificial selection of sufficiently high-yielding manioc varieties during the development of this crop.

Accuracy of wavelets, seismic inversion, and thin-bed resolution

2017 ◽  
Vol 5 (4) ◽  
pp. T523-T530
Author(s):  
Ehsan Zabihi Naeini ◽  
Mark Sams
Keyword(s):  
Seismic Data ◽  
Reservoir Characterization ◽  
Low Frequency ◽  
Seismic Inversion ◽  
Inversion Method ◽  
Frequency Content ◽  
Frequency Model ◽  
North West ◽  
The North ◽  
Well Data

Broadband reprocessed seismic data from the North West Shelf of Australia were inverted using wavelets estimated with a conventional approach. The inversion method applied was a facies-based inversion, in which the low-frequency model is a product of the inversion process itself, constrained by facies-dependent input trends, the resultant facies distribution, and the match to the seismic. The results identified the presence of a gas reservoir that had recently been confirmed through drilling. The reservoir is thin, with up to 15 ms of maximum thickness. The bandwidth of the seismic data is approximately 5–70 Hz, and the well data used to extract the wavelet used in the inversion are only 400 ms long. As such, there was little control on the lowest frequencies of the wavelet. Different wavelets were subsequently estimated using a variety of new techniques that attempt to address the limitations of short well-log segments and low-frequency seismic. The revised inversion showed greater gas-sand continuity and an extension of the reservoir at one flank. Noise-free synthetic examples indicate that thin-bed delineation can depend on the accuracy of the low-frequency content of the wavelets used for inversion. Underestimation of the low-frequency contents can result in missing thin beds, whereas underestimation of high frequencies can introduce false thin beds. Therefore, it is very important to correctly capture the full frequency content of the seismic data in terms of the amplitude and phase spectra of the estimated wavelets, which subsequently leads to a more accurate thin-bed reservoir characterization through inversion.

scholarly journals AHP with GIS for a Preliminary Site Selection of Wind Turbines in the North West of Jordan

2016 ◽  
Vol 07 (10) ◽  
pp. 1208-1221 ◽  
Author(s):  
Abdel Rahman Al-Shabeeb ◽  
Rida Al-Adamat ◽  
Atef Mashagbah
Keyword(s):  
Wind Turbines ◽  
Site Selection ◽  
North West ◽  
The North ◽  
Selection Of

scholarly journals Technology for monitoring industrial enterprises by the level of economic security

2020 ◽  
Vol 89 ◽  
pp. 03006
Author(s):  
Elena Karanina ◽  
Nataliya Maksimova ◽  
Vyacheslav Kazantsev
Keyword(s):  
Economic Security ◽  
Innovative Development ◽  
Light Industry ◽  
Important Place ◽  
North West ◽  
Statistical Comparison ◽  
Industrial Enterprises ◽  
The North ◽  
West Region ◽  
Selection Of

This article discusses the technology of monitoring industrial enterprises by the level of economic security. The problem of the financial crisis is a global problem. To get out of this state, it is necessary to monitor, review the management system and assess the level of economic security of the enterprise. The state and development of the industrial brunch is very important for the economy. In modern realities, the industrial enterprise is considered as a complex economic system, within which various processes are managed, among which an important place is occupied by innovative development. In the process of monitoring, it is necessary to pay sufficient attention to the target orientation and selection of evaluation indicators. To monitor light industry enterprises by the level of economic security, it is advisable to use economic and statistical methods. In the framework of this research the task is solved by the method of multidimensional statistical comparison. The reference values of the level of economic security have been determined and the rating of industrial enterprises of the North-West region has been determined.

scholarly journals Vegetative Propagation of Deciduous Rhododendrons using Root Stimulating Agents

2021 ◽  
Vol 38 ◽  
pp. 00121
Author(s):  
Z.I. Smirnova ◽  
I.A. Bondorina
Keyword(s):  
Vegetative Propagation ◽  
Green Building ◽  
Winter Hardiness ◽  
Optimal Conditions ◽  
The Urals ◽  
North West ◽  
The North ◽  
Central Russia ◽  
Deciduous Shrubs ◽  
Selection Of

The genus Rhododendron L. is the largest in the heather family Ericaceae DC. Rhododendrons are decorative evergreen, semi-evergreen and deciduous shrubs that have gained great popularity in green building, ornamental gardening and breeding. Among all groups of rhododendrons, deciduous are the most promising for cultivation in Central Russia due to their high winter hardiness, unpretentiousness and exceptional decorative effect. The article presents the results of experiments carried out at the GBS RAS in 2017-2020 on vegetative propagation of 50 species and varieties of deciduous rhododendrons. Vegetative propagation of deciduous rhododendrons is a rather laborious long process. Cutting deciduous rhododendrons has its own nuances and is considered problematic. In this regard, the selection of optimal conditions for the propagation of rhododendrons, which can enrich the cultural flora of the North-West, central Russia, the Urals and Siberia, was the main goal of this work.

III. Chinese Imperial Edict of 1808 A.D. on the Origin and Transmigrations of the Grand Lamas of Tibet

1910 ◽  
Vol 42 (1) ◽  
pp. 69-86
Author(s):  
L. A. Waddell
Keyword(s):  
Political Control ◽  
North West ◽  
The North ◽  
Selection Of

When at Lhasa in 1904 I found, in addition to the two earliest historical Tibetan documents yet known (as notified inthis Journal), a very long inscription of the Chinese emperor Chia-ch'ing, of 1808 a.d., which is of considerable historical interest and importance. It gives an official account of the origin of the Grand Lamaship and of the theory of succession to the same by divine reincarnations; it also prescribes the “Ordeal of the Urn” for the selection of the candidate, one of the steps taken by China to secure political control over the succession to the pontifical throne; and it records the building of the Potala palace at Lhasa as one of “the three Potalas”, and of a fourth “Potala”-academy erected by a Chinese emperor at Jehol, to the north-west of Peking.

The Boggart Sourcebook

2022 ◽  
Author(s):  
Simon Young
Keyword(s):  
Nineteenth Century ◽  
Place Names ◽  
North West ◽  
Personal Names ◽  
The North ◽  
Selection Of

Comprising three parts, this book is a companion volume to The Boggart: Folklore, History, Place-Names and Dialect. Part one, ‘Boggart Ephemera’, is a selection of about 40,000 words of nineteenth-century boggart writing (particularly material that is difficult to find in libraries). Part two presents a catalogue of ‘Boggart Names’ (place-names and personal names, totalling over 10,000 words). Finally, part three contains the entire ‘Boggart Census’ – a compendium of ground-breaking grassroots research. This census includes more than a thousand responses, totalling some 80,000 words, from older respondents in the north-west of England, to the question: ‘What is a boggart?’ The Boggart Sourcebook will be of interest to folklorists, historians and dialect scholars. It provides the three corpora on which the innovative monograph, The Boggart, is based.

Excavations of a Kiln Site at Tocra Libya in August 1974

1974 ◽  
Vol 6 ◽  
pp. 25-29 ◽  
Author(s):  
J. A. Riley
Keyword(s):  
North Africa ◽  
Third Century ◽  
General Direction ◽  
North West ◽  
The North ◽  
Kiln Site ◽  
Different Types ◽  
Pottery Kiln ◽  
Selection Of ◽  
Local Farmers

It has been known since 1954 that a pottery kiln site is situated about 100 metres to the North West of the West Gate of Roman Tocra, in the area known locally as ‘Howa El-Faquar’ (Area of Potsherds).While looking for tombs in the East face of the small quarry in this area (see Fig.l), Wright discovered in 1954 part of a wastage dump from a kiln. The general direction of the tip lines led him to consider that one of the kilns was situated on a ‘small but salient mound’ (see Pl.1) nearby. He published a selection of pottery from the dump and, after some discussion, based on lamp evidence, he placed the date of the group at around A.D.100.As this area is now outside the area controlled by the Department of Antiquities and is being ploughed by local farmers, it was thought expedient to examine the area through limited excavation for several reasons. A date of around A.D.100 seemed too early in the light of a study of the coarse pottery from the recent excavation at Sidi Krebish in Benghazi: a late second or early third century A.D. date seemed more appropriate. It was hoped that further excavation at Tocra would shed more light on this. In addition, few kilns have been excavated anywhere in North Africa to date and the potential of the Tocra site for structural and organisational information about the pottery industry is very great. It was also considered an excellent opportunity to study in detail a large group of contemporary pottery and to quantify the relative proportions of the different types.Permission was kindly granted by Mr. Masoud Shagluf, Controller of Antiquities for Western Cyrenaica, and a two week excavation took place in August 1974.

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