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Wyszukujesz frazę "Niger Delta" wg kryterium: Temat


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Tytuł:
Structural and seismic sequence stratigraphy analysis of seismic and biostratigraphy data from an onshore field, Niger Delta, Nigeria
Autorzy:
Emujakporue, G. O.
Eyo, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/1078525.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Niger Delta
Sequence stratigraphy
faults
horzons
seismic
Opis:
The structural and sequence stratigraphy of a Niger Delta onshore field has been analysed from seismic and biostratigraphy data in order to assess the hydrocarbon potential of the area. Seven faults F1, F2, F3, F4, F5, F6 and F7 were delineated in the seismic sections. The faults, F1, F4, F6 and F7 are synthetic faults, while F2, F3 and F5 are antithetic. Two horizons H1 and H2 were identified in the seismic sections within the time window of 2200-2600 ms. The seismic sequence stratigraphy analysis revealed five sequence boundaries S1, S2, S3, S4 and S5, which represent four depositional sequences. Four maximum flooding surfaces (MFS) were also delineated in the seismic data. The analysis of the biostratigraphy data thus revealed four sequence boundaries (S1, S2, S3, S4) and three maximum surfaces (MFS1, MFS2 and MF3). The age of the sequence boundary ranges from 13.1Ma to 8.3 Ma. The age of the observed maximum flooding surfaces ranges from 12.8 Ma to 9.4 Ma. In vertical succession, the depositional sequences were identified by the order; sequence boundary, lowstand system tract (LST), Transgressive system tract (TST), Maximum flooding surface (MFS), and Highstand system tract (HST). The lowstand system tract is made up of stacking pattern of sand, while the transgressive system tract thinned into the condense section.
Źródło:
World News of Natural Sciences; 2019, 22; 190-199
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stratigraphy and sedimentology of the Niger Delta
Autorzy:
Reijers, T. J. A.
Powiązania:
https://bibliotekanauki.pl/articles/94623.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Niger Delta
biostratigraphy
sedimentology
(mega)sequences
cycles
Delta Nigru
biostratygrafia
sedymentologia
cykle
Opis:
During the Cenozoic, until the Middle Miocene, the Niger Delta grew through pulses of sedimentation over an oceanward-dipping continental basement into the Gulf of Guinea; thereafter progradation took place over a landward-dipping oceanic basement. A 12,000 m thick succession of overall regressive, of flapping sediments resulted that is composed of three diachronous siliciclastic units: the deep-marine pro-delta Akata Group, the shallow-marine delta-front Agbada Group and the continental, delta-top Benin Group. Regionally, sediment dispersal was controlled by marine transgressive/regressive cycles related to eustatic sea-level changes with varying duration. Differential subsidence locally influenced sediment accumulation. Collectively, these controls resulted in eleven chronostratigraphically confined delta-wide megasequences with considerable internal lithological variation. The various sea-level cycles were in or out of phase with each other and with local subsidence, and interfered with each other and thus influenced the depositional processes. At the high inflection points of the long-term eustatic sea-level curve, floodings took place that resulted in delta-wide shale markers. At the low inflection points, erosional channels were formed that are often associated, downdip, with turbidites in low-stand sediments (LSTs). The megasequences contain regional transgressive claystone units (TST) followed by a range of heterogeneous fine-to-coarse progradational or aggradational siliciclastic (para)sequence sets formed during sea-level high-stand (HST). An updated biostratigraphic scheme for the Niger Delta is presented. It also updates a sedimentation model that takes into consideration local and delta-wide effects of sea-level cyclicity and delta tectonics. Megasequences were formed over time intervals of ~5 Ma within individual accurate megastructures that laterally linked into depobelts. The megasequences form the time-stratigraphic frame of the delta and are the backbone for the new delta-wide lithostratigraphy proposed here. Such a new lithostratigraphy is badly needed, in particular because of the vigorous new activity in the offshore part of the Niger Delta (not covered in this contribution). There, as well as in the onshore part of the delta, the traditional lithostratigraphic subdivision of the Cenozoic Niger Delta section into three formations is insufficient for optimum stratigraphic application; moreover, the various informal subdivisions that have been proposed over time are inconsistent.
Źródło:
Geologos; 2011, 17, 3; 133-162
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radial Flow Tracer Test to Investigate Coefficient of Transverse Dispersion in an Aquifer in the Eastern Niger Delta, Nigeria
Autorzy:
Ugbena, K. G.
Akpokodje, Enuvie G.
Tse, A. C.
Powiązania:
https://bibliotekanauki.pl/articles/1068620.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aquifer
Niger Delta
advective velocity
contaminant
longitudinal dispersion
transverse dispersion
Opis:
The complex nature of flow dynamic of water at the subsurface makes it difficult to characterize directly the processes taking place in a porous medium. As a result, carrying out studies on the characteristics of contaminants at the subsurface often relies on indirect measurements of the parameters of the system. To overcome these difficulties and provide information on the subsurface, the continuous use of tracers in simulation studies to model hydrological characteristics at the subsurface has provided an important tool for understanding the flow and mixing dynamics of water resource systems. Results obtained from this radial flow tracer test shows coefficient of longitudinal and transverse dispersion of 2.104×10-3 m2s-1 and 1.54×10-3 m2s-1 respectively, longitudinal and transverse dispersivity of 1.73m and 1.27m respectively. Multidimensional transport in an aquifer involves both longitudinal and transverse dispersion in addition to advection process. Transverse dispersion in an aquifer spreads dissolved contaminant by molecular diffusion when flow velocity of groundwater is highly low. Initial concentration of dissolved contaminants at the point of release can produce an upstream spreading in a longitudinal transverse direction by molecular dispersion which is a diffusion-like process in an aquifer. Results obtained from tracer test can be used to characterize a site and for groundwater monitoring. Having basic knowledge of some physical processes taking place at the subsurface such as that produced from tracer test can also help in the design of environmental network to evaluate possible accidental migration of contaminants once it occur in aquifers and plan suitable mitigation actions to safeguard our water resource.
Źródło:
World Scientific News; 2019, 132; 233-243
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engaging Cinema in Environmental Crisis: A Paradigm of Documentary Films of the Niger Delta
Kino zaangażowane w kryzys ekologiczny: przykład filmów dokumentalnych z delty Nigru
Autorzy:
Okpadah, Stephen Ogheneruro
Powiązania:
https://bibliotekanauki.pl/articles/31339683.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Slawistyki PAN
Tematy:
kino
delta Nigru
dokument
ekodemokracja
biocentryzm
cinema
Niger Delta
documentary
eco-democracy
biocentrism
Opis:
The oil-rich Niger Delta region of Nigeria remains one of the most environmentally devastated places in the world. This is caused by gas flaring, crude oil spillages, illegal oil bunkering and pipeline vandalism in the region. The call for eco-democracy and the disruption of eco-apathy has driven global academia into developing paradigms that would foster environmental transformation. Interestingly, while academic disciplines such as history, geography, anthropology and the global humanities continue to critically engage in practices and discourses that would facilitate achieving anticipatory climate adaptation, African academia, especially in Nigeria, has been slow to absorb the same critical spirit as the West. In fact, environmental film critics in Nigeria have not fully explored the environmental discourse that has gathered strength in other disciplines central to the greening of the humanities. Therefore, there remains a dearth of critical underpinning for environment and cinema, or what I term discourses of/on the green cinema, in African scholarship. Against this backdrop, I examine environmental crisis in the documentary films Delta Blues, The Nigerian Oil Thieves and The True Price of Crude Oil, and use content analysis method to investigate how these films have been used to create environmental awareness in the region. The analysis is anchored on Adrian Ivakhiv’s biocentric model of ecocriticism, which acknowledges the unity of man and all the creatures and the environment around him, and further recommends a shift from human-centrism to biocentrism.
Bogaty w ropę region delty Nigru w Nigerii pozostaje jednym z najbardziej zdewastowanych środowiskowo miejsc na świecie. Jest to spowodowane spalaniem gazu, wyciekami ropy naftowej, nielegalnym bunkrowaniem ropy i aktami wandalizmu dokonywanymi na rurociągach w regionie. Dążenie do ekodemokracji i przerwania ekoapatii skłoniło światowych naukowców do opracowania paradygmatów, które sprzyjałyby transformacji środowiskowej. Na gruncie dyscyplin akademickich, takich jak historia, geografia, antropologia i humanistyka globalna, trwa więc krytyczne zaangażowanie w praktyki i dyskursy, które mogłyby ułatwić osiągnięcie antycypacyjnej adaptacji do klimatu. Tymczasem jednak afrykańskie uczelnie, szczególnie nigeryjskie, dużo wolniej przyswajają krytyczne podejście właściwe Zachodowi. Krytycy filmów ekologicznych w Nigerii nie zbadali w pełni dyskursu środowiskowego, który nabrał siły w innych dyscyplinach kluczowych dla ekologizacji humanistyki. Dlatego też w afrykańskiej nauce wciąż brakuje krytycznych podstaw do analizy związków środowiska i kina lub też, jak to nazywam, dyskursów na temat „zielonego” kina. Na tym tle przyglądam się kryzysowi ekologicznemu w filmach dokumentalnych Delta Blues, The Nigerian Oil Thieves and The True Price of Crude Oil. Analiza treści ma pozwolić na zbadanie, w jaki sposób filmy te zostały wykorzystane do budowania świadomości ekologicznej w regionie. Analiza opiera się na biocentrycznym modelu ekokrytyki Adriana Ivakhiva, który uznaje jedność człowieka i wszystkich stworzeń oraz otaczającego go środowiska, zalecając przejście od humancentryzmu do biocentryzmu.
Źródło:
Colloquia Humanistica; 2022, 11; 1-22
2081-6774
2392-2419
Pojawia się w:
Colloquia Humanistica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Channel dynamics and hydraulic geometry of two tropical deltaic catchments in Southern Nigeria
Autorzy:
Aisuebeogun, A. O.
Ezekwe, I. C.
Powiązania:
https://bibliotekanauki.pl/articles/294615.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
Catchment morphometry
hydraulic processes
Sombreiro River
New Calabar River
Niger Delta
Opis:
This paper attempts to explain the channel processes and dynamics of two river systems running through a rapidly urbanizing humid tropical deltaic environment with visible threats from industrialization and pollution. Hydraulic processes and parameters were compared with established power function relations for hydraulic geometry and it was discovered that the fundamental relations between channel-geometry dimensions, velocity, and flow can be expressed for the catchments. Ten gauging stations in each catchment were studied and results showed that the studied catchments adjust their geometry to changing discharges. High values of coefficients of determination among variables indicated that much of the downstream variation in channel width to depth ratio can be accounted for by changes in discharge. Also in this study the width/depth ratio (F) was found to be related to the percentage of silt + clay (M) in channel perimeter and that downstream hydraulic-geometry relations are in general agreement with previously published hydraulic and channel adjustment data.
Źródło:
Landform Analysis; 2014, 27; 3-13
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural - Resource Curse, Niger Delta Crisis and Oil Exploration in Nigeria: A Theoretical Analysis
Autorzy:
Mevayerore, Daniel Igbini
Powiązania:
https://bibliotekanauki.pl/articles/1031839.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Natural Resources
Niger Delta Crisis
Nigeria
Oil Exploration
Resource Curse
Socioeconomic Development
Opis:
This investigation inspects the contemporary Niger Delta crisis and its socioeconomic problems, as well as the underdevelopment status in the region from one hand and the nation on the other hand to the discovery cum exploration of raw petroleum stores in huge amounts utilizing the Resource Curse hypothesis as a core interest. The investigation contended that the discovery of oil and its exploration in huge amount throughout the years has produced clashes as opposed to harmony between the host communities, the multinational corporations as well as the Government on the on hand, and has generated intra and inter-communal crisis on the other hand. The study addresses these substances and relates same to the exercises of the Federal Government of Nigeria and the act of Quasi-federalism in the nation since her freedom. The study embraces the recorded and scientific structure as it methodological part. This means that relevant data for the study were derived from secondary sources via; textbooks, journal articles, official documents, and web materials. Above all, the investigation proffers valuable suggestions to be embraced by the government of the league to take out blended emotions and crisis in the host communities just as that between the worldwide companies, government and the oil rich communities in the Niger Delta. Likewise of significance, is an extreme way to deal with crisis is for the Government to dispense with the underdevelopment status of the nation in the global financial cum political field?
Źródło:
World Scientific News; 2020, 141; 1-11
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Niger Delta Agitation for Resource Control: Making Sense of Common Law Private Property Ownership Principles in the Management and Control of Oil Resources in Nigeria
Agitacja na rzecz kontroli zasobów w delcie Nigru. Rozumienie zasad dotyczących własności rzeczy na gruncie common law w zakresie zarządzania i kontroli zasobami ropy naftowej w Nigerii
Autorzy:
Faga, Hemen Philip
Ngwoke, Rita Abhavan
Powiązania:
https://bibliotekanauki.pl/articles/2096348.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
resource control
private property
ownership
common law
oil
Niger Delta
kontrola zasobów
własność prywatna
własność
ropa naftowa
delta Nigru
Opis:
The agitation for resource control in Nigeria’s Niger Delta region has frequently snowballed into violence and militancy. Although the demand for resource control borders on the transfer of ownership and management and control of the processes of exploitation of crude oil found abundantly in the region, the exact parametres of the demand are not defined by the agitators. This paper examined the various variants of resource control demanded by the different groups of agitators in the Niger Delta. It particularly argued that the common law private property ownership principles of Cuius est solum, eius est usque ad coelum et ad inferos, and Quic quid plantatur solo, solo cedit be adopted to transfer ownership of natural resources, including crude oil to the indigenous inhabitants of the oil rich Niger Delta region in line with the principles of true federalism. The paper recommended the restructure of the Nigerian federal system to devolve more powers to the states and repeal of certain existing laws that inhibit the rights of the people to own land and natural resources beneath those lands, which belong to them, their ancestors and children yet unborn.
Agitacja na rzecz kontroli zasobów w regionie delty Nigru w Nigerii często przeradza się w przemoc i wojnę. Chociaż postulat kontroli zasobów łączy się z kwestiami przeniesienia własności oraz zarządzania i kontroli procesów wydobycia ropy naftowej występującej w dużych ilościach w regionie, dokładne parametry tych żądań nie zostały określone przez agitatorów. W niniejszym artykule analizie poddano różne warianty kontroli zasobów, której domagają się różne grupy agitatorów w delcie Nigru. W szczególności podkreślono, że zasady dotyczące własności prywatnej, wynikające z common law: Cuius est solum, eius est usque ad coelum et ad inferos oraz Quiquid plantatur solo, solo cedit, powinny zostać zastosowane do przenoszenia własności zasobów naturalnych, w tym ropy naftowej, na rdzennych mieszkańców bogatego w ropę regionu delty Nigru, zgodnie z zasadami prawdziwego federalizmu. Autorzy zalecają restrukturyzację nigeryjskiego systemu federalnego w kierunku przekazania większych uprawnień stanom i uchylenia niektórych istniejących praw, które ograniczają prawa ludzi do własności ziemi i zasobów naturalnych znajdujących się pod powierzchnią gruntów należących do nich, ich przodków i jeszcze nienarodzonych dzieci.
Źródło:
Studia Iuridica Lublinensia; 2021, 30, 5; 223-252
1731-6375
Pojawia się w:
Studia Iuridica Lublinensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Re-evaluating coastal aquifer using graphical and geochemical approach. A case study of Niger Delta Region, Nigeria
Autorzy:
Eyankware, Moses Oghenenyoreme
Ulakpa, Ruth Oghenerukevwe Eyankware
Ike, Joy
Powiązania:
https://bibliotekanauki.pl/articles/1193350.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Chloride - Sulfate Mass Ratio
Corrosion
Larson–Skold Index
Niger Delta Region
Revelle Index
groundwater
plots
seawater intrusion
Opis:
The study was carried out in coastal region of Niger Delta, Nigeria. This study was aimed at evaluating the effect of seawater intrusion and corrosion tendency on coastal aquifer. In other to achieve this aim, 24 groundwater samples was measured and analyzed for various hydrochemical parameters. Results obtained from the study revealed that groundwater was considered to fresh water based on TDS value obtained. Findings from geochemical model showed that 71 % of groundwater samples showed trace of seawater intrusion, while the remaining 29 % showed no trace of seawater intrusion. The value obtained from corrosivity indices such as Chloride-Sulfate Mass Ratio (CSMR) revealed that 33% of groundwater showed no galvanic corrosion potential, 67% showed galvanic corrosion potential, findings obtained from Revelle Index (RI) showed that 2 % of groundwater was not influenced by salinization, 96 % was slightly influenced by salinization and 2% strongly influenced by salinization. Values obtained from Larson-Skold Index (LSI) showed that groundwater samples were classified to be high in corrosion expect for sample locations pH/07 and 23. The plot of Cl¯/HCO3¯ against Cl¯ revealed that 98% of groundwater were classified to be slightly/moderately influenced by sea water intrusion, 2 % was strongly influenced by seawater. Findings from Chadba plots suggested that 97 % of groundwater were of Ca2+ - Mg2+- ˗ Cl¯ water type, 2% were of Na+ ˗ Cl¯ water type and 1% is of Ca2+ - Mg2+ - HCO3¯ water type. On a general note, it was observed that seawater intrusion slightly influenced groundwater of the study area.
Źródło:
World Scientific News; 2021, 154; 133-151
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainability, Corporate Community Engagement and Enterprise Development – Lessons from a Case Study in Emu-Ebendo Niger-Delta, Nigeria
Zrównoważenie, korporacyjne zaangażowanie społeczne i rozwój przedsiębiorstw – lekcja z Emu-Ebendo w delcie Nigru, Nigeria
Autorzy:
Ajide, O. E.
Strachan, P. A.
Russell, A.
Jones, D. R.
Powiązania:
https://bibliotekanauki.pl/articles/371199.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Komitet Człowiek i Środowisko PAN
Tematy:
community engagement
community enterprise development
sustainability
local content
Niger Delta
Nigeria
oil and gas
zaangażowanie społeczne
społeczny rozwój przedsiębiorstwa
zrównoważoność
lokalna zawartość
Delta Nigru
ropa i gaz
Opis:
Corporate community engagement remains an under researched area in sustainability debates. Presenting a case study, based on in-depth interviews and site visits, of how one indigenous company Energia Ltd has formed a strong partnership or bond with the Emu-Ebendo community in the oil rich Niger Delta, the dynamics of corporate community engagement are critically discussed. Evidence of how both the company and community has benefited from this relationship is presented. The case analysis concludes that the company has effectively utilised a clearer understanding of the culture of the host community, leading to a transformational relationship. The approach adopted by Energia Ltd in the Emu-Ebendo community is unique in context. The key conclusion reached is that community benefit funds and community enterprise development, as a derivative of corporate engagement, can play a transformational role in societal and economic development.
Kwestia korporacyjnego zaangażowania społecznego nie jest często podejmowana w ramach debat o rozwoju zrównoważonym. Lukę tę uzupełnia niniejsze studium przypadku, oparte na szczegółowych wywiadach i pracy w terenie. Pokazujemy, w jaki sposób kompania Energia Ltd wprowadziła zasadę partnerstwa, w wyniku której nawiązała się silna więź pomiędzy firmą a społecznością Emu-Ebendo zamieszkującą bogatą w ropę Deltę Nigru. Przedstawiono dowody, jakie korzyści odniosły zarówno kompania, jak i społeczność. Przeprowadzono analiza pokazuje, że firma efektywnie wykorzystała zasady wyznaczające ramy kultury lokalnej społeczności, co prowadziło do pozytywnych zmian odnoszących się do wzajemnej relacji. Podejście przyjęte przez Energia Ltd wobec społeczności Emu-Ebendo jest nowatorskie. Okazało się, że fundusze świadczeń społecznych i społeczny rozwój przedsiębiorstw, będące pochodną zaangażowania korporacyjnego, mogą odgrywać podstawową rolę w przemianach społecznego i ekonomicznego rozwoju.
Źródło:
Problemy Ekorozwoju; 2017, 12, 2; 59-67
1895-6912
Pojawia się w:
Problemy Ekorozwoju
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Channel characteristics and planform dynamics of the lower Niger River, Niger Delta Basin (1985–2015)
Autorzy:
Akana, Tombra
Adeigbe, Olubunmi
Powiązania:
https://bibliotekanauki.pl/articles/184736.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
delta
channel dynamics
avulsion
human activities
GIS
Niger River Valley
Opis:
This study used repeat satellite imagery and Geographic Information System analysis to assess the planform dynamics along the length of the lower Niger River Valley from Onitsha city to the coast between 1985 and 2015. The aim is to understand the altered dynamics and its plausible causes in this data-poor region. Analyses revealed that the Niger River has undergone change corresponding to enhanced instability in terms of an increased rate of erosion. In the study area, a change was observed from 3.7% of deposition in the first 10 years (1985–1995) to 3.9% of erosion in the next 10 years (1995–2005) and 4.7% of erosion in the last 10 years (2005–2015). Total erosion over the 30-year period (1985–2015) in the delta was calculated on 4.8%. The river channel has migrated toward the east in the upper and lower reaches while the mid-section of the channel is migrating towards the west. The east river bank is observed to be more unstable compared to west bank line through the study period. The maximum shifts identified were 3.35 km of deposition in 10 years (1985–1995), 3.31 km of erosion in the next 10 years (1995–2005), and another substantial erosional shift of 3.35 km in the next 10 years (2005–2015). Avulsion rates gradually moved from −42.1 m ∙ year−1 (1985–2005, segment F) to 100.2 m ∙ year−1 (1985–1995, segment D), large deposition in the first 10 years. Total avulsion rates of the delta in the last 30 years (1985–2015) has pointed on erosion (−2.2 m ∙ year−1). The altered dynamics observed would likely threaten the future of the fragile lower river system environment and raise concerns for operators with infrastructure within the Niger Delta.
Źródło:
Geology, Geophysics and Environment; 2019, 45, 4; 291-304
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
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