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Wyszukujesz frazę "dual power" wg kryterium: Temat


Tytuł:
The determination of accuracy of test gear wheel for aeronautical dual - power path gear before heat treatment
Autorzy:
Dziubek, T.
Budzik, G.
Kozik, B.
Sobolewski, B.
Powiązania:
https://bibliotekanauki.pl/articles/241821.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gear
aircraft gearbox
coordinate measuring technique
dual-power path gear
Opis:
Manufacture of aircraft gearbox elements requires control of gear geometric parameters at different stages of technological process. In case of measurement of gear wheels using modern technologies based on numerical machines, measurement process is based on processing of numerical data obtained by measurement using coordinate measuring machines. The goal of this paper is to present the measurement process of gears, using coordinated optical scanner ATOS II TripleScan by GOM, equipped with a turntable. The aim of this study is to develop and execute the analysis accuracy of the geometry of the gear of aeronautical dual-power path gear after the roughing operation using optical coordinate measuring methods. Executed research will enable the detection of errors occurring in the machining process and to determine the value of founded the machining allowance finishing in relation to the CAD model. Using coordinate measuring technique, one can specify a set of methods and procedures for the designation of the complex dimensions of physical objects and transform them into a computer program space of coordinate measuring devices. On this basis, it is possible to determine the accuracy of the gear wheel as the workpiece prior to heat treatment. The results will be the basis to determine the effect of heat treatment on changes in the geometry of the gear and the benchmark for determining the correctness of the finishing.
Źródło:
Journal of KONES; 2013, 20, 2; 83-90
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of precision of making elements for aeronautical dual - power path gear demonstrator applying venture baty coordinate measuring machine
Autorzy:
Kozik, B.
Budzik, G.
Markowski, T.
Dziubek, T.
Grzelka, M.
Powiązania:
https://bibliotekanauki.pl/articles/247833.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
analysis of precision
coordinated measuring machine
dual-power path gear
demonstrator
Opis:
The paper presents the process of measuring and analysing precision of making toothed wheels for a demonstrator of aeronautical dual-power path gear by means of FDM [2]. A coordinate measuring machine VENTURE BATY has been used in the research. The capabilities of the presented optical measuring machine make it possible to measure spur gears with different modules including small ones (m less than1)which is a great advantage of this kind of measuring equipment. Analysing precision of making elements of gears is one of more important stages in creating them [6]. However, it is necessary to remember that the controlling stage should be carried out in accordance with standards concerning measuring toothed wheels defining this activity. The measuring method presented in the paper and the outcome of measurements allowed for designing a demonstrator of dual-power path gear intended for stand tests. The correct operation of a gear is assured by proper choice of constructional parameters of cooperating wheels taking into account materials used in FDM technology. The optical machine BATY is equipped with FUSION software used while measuring and analysing precision and it allows for data processing and exchanging the data with other programming environments. It is, however, restricted by one data exchange format - DXF. With regard to 2D measurement specific character, the machine does not make it possible to control tooth outline and as a consequence, it is possible to measure only gears with straight teeth. On the other hand, the advantage of the above is the possibility of comparing the measurement to CAD-2D model, which makes it possible to analyse the precision of wheels with non-standard profiles (other than envolute ones).
Źródło:
Journal of KONES; 2012, 19, 2; 253-257
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rozdwojenie władzy. Jameson i utopijna spekulacja
Dual Power. Fredric Jameson and Utopian Speculation
Autorzy:
Milenkowicz, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1013051.pdf
Data publikacji:
2017-09-15
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Fredric Jameson
Theodor Adorno
Ernst Bloch
utopia
dual power
army
mobilization
dwuwładztwo
armia
mobilizacja
Opis:
Celem artykułu jest próba rekonstrukcji projektu utopijnego społeczeństwa zarysowanego w pracy An American Utopia. Dual Power and the Universal Army Fredrica Jamesona. Ramę interpretacyjną stanowi ujęcie utopii jako modalności oraz przekonanie o podsumowującym charakterze, jaki tekst ten stanowi w ramach twórczości autora. Szczegółowej uwadze poddany został sposób, w jaki utopijna spekulacja Jamesona stara się przenegocjować swoją własną niemożliwość.
This article constitutes an attempt to reconstruct the utopian society projected in An American Utopia. Dual Power and the Universal Army by Fredric Jameson. Its interpretive framework grasps the utopian form as a modality. The manner in which the essay summarizes the previous work of the author is also assessed. Attention is given to the way the critical function of the utopian form makes itself apparent in the process of demonstrating its own impossibility.
Źródło:
Praktyka Teoretyczna; 2017, 25, 3; 291-304
2081-8130
Pojawia się w:
Praktyka Teoretyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-attribute decision-making based on q-rung dual hesitant power dual Maclaurin symmetric mean operator and a new ranking method
Autorzy:
Li, Li
Wang, Jun
Ji, Chunliang
Powiązania:
https://bibliotekanauki.pl/articles/2175106.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
q-rung dual hesitant fuzzy sets
power geometric
dual Maclaurin symmetric mean
power dual Maclaurin symmetric mean
multi-attribute decision-making
Opis:
The ability of q-rung dual hesitant fuzzy sets (q-RDHFSs) in dealing with decision makers’ fuzzy evaluation information has received much attention. This main aim of this paper is to propose new aggregation operators of q-rung dual hesitant fuzzy elements and employ them in multi-attribute decision making (MADM). In order to do this, we first propose the power dual Maclaurin symmetric mean (PDMSM) operator by integrating the power geometric (PG) operator and the dual Maclaurin symmetric mean (DMSM). The PG operator can reduce or eliminate the negative influence of decision makers’ extreme evaluation values, making the final decision results more reasonable. The DMSM captures the interrelationship among multiple attributes. The PDMSM takes the advantages of both PG and DMSM and hence it is suitable and powerful to fuse decision information. Further, we extend the PDMSM operator to q-RDHFSs and propose q-rung dual hesitant fuzzy PDMSM operator and its weighted form. Properties of these operators are investigated. Afterwards, a new MADM method under q-RDHFSs is proposed on the basis on the new operators. Finally, the effectiveness of the new method is testified through numerical examples.
Źródło:
Archives of Control Sciences; 2022, 32, 3; 627--658
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy Analysis of Cavitation Bubbles Under Dual-Frequency Acoustic Excitation
Autorzy:
Lv, Liang
Hu, Kai
Liu, Fei
Li, Yawei
Cui, Bing
Powiązania:
https://bibliotekanauki.pl/articles/31339947.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
dual-frequency acoustic excitation
power
sonoluminescence
sonochemistry
Opis:
Cavitation has been widely used in wastewater degradation, material synthesis and biomedical field under dual-frequency acoustic excitation. The applications of cavitation are closely related to the power (i.e. the rate of internal energy accumulation) during bubble collapse. The Keller–Miksis equation considering liquid viscosity, surface tension and liquid compressibility is used to describe the radial motion of the bubble. The model is built in predicting the power during bubble collapse under dual-frequency acoustic excitation. The influences of parameters (i.e. phase difference, frequency difference, and amplitude ratio) on the power are investigated numerically. With the increase of phase difference, the power can be fluctuated in a wide range at all conditions. Three typical characteristics of the power appear under the effects of frequency difference and amplitude ratio. With the increase of amplitude ratio, if the frequency difference is small, the power has two maximum values; and if the frequency difference is medium, there is a maximum value. Otherwise, the power monotonously decreases. The results can provide theoretical references for the selections of experimental parameters of sonoluminescence and sonochemistry in the dual-frequency acoustic field.
Źródło:
Archives of Acoustics; 2022, 47, 4; 513-518
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprawność energetyczna oraz wskaźnik emisji dwutlenku węgla z bloku gazowoparowego dwupaliwowego w układzie równoległym
Autorzy:
Bartnik, Ryszard
Buryn, Zbigniew
Hnydiuk-Stefan, Anna
Powiązania:
https://bibliotekanauki.pl/articles/89601.pdf
Data publikacji:
2018
Wydawca:
Nowa Energia
Tematy:
blok energetyczny
elektrociepłownia
elektrownia
układ dwupaliwowy
power block
power plant
power
dual fuel system
Opis:
Układy gazowo-parowe dwupaliwowe, szczególnie układ równoległy obok budowy nowych bloków energetycznych stanowią również duży potencjał modernizacyjny dla już istniejących elektrociepłowni i elektrowni, węglowych [1-6]. Układy dwupaliwowe mogą bowiem powstawać w wyniku nadbudowy już istniejących cieplnych struktur węglowych turbiną gazową. Bardzo istotną zaletą takich modernizacji obok zwiększenia mocy elektrycznych bloków jest także znaczne zwiększenie sprawności wytwarzania w nich energii elektrycznej oraz znaczne zmniejszenie emisji dwutlenku węgla na megawatogodzinę wyprodukowanej energii elektrycznej netto.
Źródło:
Nowa Energia; 2018, 3; 60-63
1899-0886
Pojawia się w:
Nowa Energia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertex coloring the square of outerplanar graphs of low degree
Autorzy:
Agnarsson, Geir
Halldórsson, Magnús
Powiązania:
https://bibliotekanauki.pl/articles/744076.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
outerplanar
chromatic number
power of a graph
weak dual
Opis:
Vertex colorings of the square of an outerplanar graph have received a lot of attention recently. In this article we prove that the chromatic number of the square of an outerplanar graph of maximum degree Δ = 6 is 7. The optimal upper bound for the chromatic number of the square of an outerplanar graph of maximum degree Δ ≠ 6 is known. Hence, this mentioned chromatic number of 7 is the last and only unknown upper bound of the chromatic number in terms of Δ.
Źródło:
Discussiones Mathematicae Graph Theory; 2010, 30, 4; 619-636
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An optimization study on an eco-friendly engine cycle named as Dual-Miller cycle (DMC) for marine vehicles
Autorzy:
Gonca, G.
Powiązania:
https://bibliotekanauki.pl/articles/259357.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Dual-Miller cycle engine
engine performance
power density
finite-time thermodynamics
Opis:
The diesel engine is an indispensable part of technology and it is commonly used in land and marine vehicles. However, diesel engines release NOx emissions due to high combustion temperatures. They have harmful effects on the environment such as sources of photo-chemical fog and climate changes. Therefore, they must be reduced and limited. The Miller cycle application is a NOx control method and it is popular in the recent years to abate NOx produced from the internal combustion engines (ICEs). A performance investigation of a Dual-Miller cycle (DMC) engine in terms of power (PO), power density (PD) and effective efficiency (EE) has been performed using a new finite-time thermodynamics modeling (FTTM) in this study. The effects of engine design and operating parameters on the engine performance (EPER) have been examined. Additionally, the energy losses have been determined resulting from incomplete combustion (IC), friction (FR), heat transfer (HT) and exhaust output (EO). The results presented could be an essential tool for DMC marine engine designers.
Źródło:
Polish Maritime Research; 2017, 3; 86-98
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A dual-stator brushless doubly-fed generator for wind power application
Autorzy:
Liu, Hao
Song, Yakai
Bai, Chunlan
He, Guofeng
Yin, Xiaoju
Powiązania:
https://bibliotekanauki.pl/articles/27309959.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
doubly-fed machine
dual-stator
electromagnetic analysis
operational characteristics modes
wind power generation
Opis:
A novelty dual-stator brushless doubly-fed generator (DSBDFG) with magnetic-barrier rotor structure is put forward for application in wind power. Compared with a doubly-fed induction generator, the DSBDFG has virtues of high reliability and low maintenance costs because of elimination of brush and sliprings components. Therefore, the proposed structure has tremendous potential as a wind power generator to apply in wind power. According to the operating principle of electric machine, the DSBDFG is studied in wind power application. At first, the topology, the winding connecting, the rotor structure, the power flow chart of different operating models and the variable speed capability of electric machine are discussed and analyzed. Then, a 50 kW DSBDFG is designed. Based on the principal dimension of the design electric machine, the electromagnetic characteristics of the DSBDFG with different running modes are analyzed and calculated to adopt the numerical method. From the result, it meets the requests of electromagnetic consistency and winding connecting in the design electric machine. Meanwhile, it confirms the proposed DSBDFG has the strong ability of speed regulation.
Źródło:
Archives of Electrical Engineering; 2023, 72, 4; 1073--1087
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual hesitant pythagorean fuzzy Hamacher aggregation operators in multiple attribute decision making
Autorzy:
Wei, G.
Lu, M.
Powiązania:
https://bibliotekanauki.pl/articles/229895.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multiple attribute decision making (MADM)
dual Pythagorean hesitant fuzzy values
dual hesitant Pythagorean fuzzy Hamacher hybrid average (DHPFHHA) operator
dual hesitant Pythagorean fuzzy Hamacher hybrid geometric (DHPFHHG) operator
power aggregation operators
Opis:
In this paper, we investigate the multiple attribute decision making (MADM) problem based on the Hamacher aggregation operators with dual Pythagorean hesitant fuzzy information. Then, motivated by the ideal of Hamacher operation, we have developed some Hamacher aggregation operators for aggregating dual hesitant Pythagorean fuzzy information. The prominent characteristic of these proposed operators are studied. Then, we have utilized these operators to develop some approaches to solve the dual hesitant Pythagorean fuzzy multiple attribute decision making problems. Finally, a practical example for supplier selection in supply chain management is given to verify the developed approach and to demonstrate its practicality and effectiveness.
Źródło:
Archives of Control Sciences; 2017, 27, 3; 365-395
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A power-balanced sequential element for the delay-based dual-rail precharge logic style
Autorzy:
Bongiovanni, S
Olivieri, M
Scotti, G.
Trifiletti, A.
Powiązania:
https://bibliotekanauki.pl/articles/397742.pdf
Data publikacji:
2013
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
cryptography
delay-based dual-rail precharge logic
DDPL
dynamic flip-flop
dual-rail precharge logic
power analysis
PA
power-balanced circuits
sense amplifier-based logic
SABL
VLSI design
VLSI
kryptografia
przerzutnik dynamiczny
analiza energetyczna
Opis:
Delay-based Dual-rail Pre-charge Logic (DDPL) is a logic style introduced with the aim of hiding power consumption in cryptographic circuits when a Power Analysis (PA) attack is mounted. Its particular data encoding allows to make the adsorbed current constant for each data input combination, irrespective of capacitive load conditions. The purpose is to break the link between dynamic power and data statistics and preventing power analysis. In this work we present a novel implementation of a dynamic differential master-slave flip-flop which is compatible with the DDPL data encoding. Efforts were made in order to design a completely dynamic master-slave architecture which does not require a conversion of the signals from dynamic to static domain. Moreover we show that the area occupied is also reduced due to a compact differential layout. Simulations performed using a 65nm-CMOS process showed that the proposed circuit exhibits good performance in terms of NED (Normalized Energy Deviation) and CV (Coefficient of Variation) of the current samples as required in transistor level countermeasures against power analysis, and it outperforms other previously published DPA-resistant flip-flops in the real case of unbalanced load conditions.
Źródło:
International Journal of Microelectronics and Computer Science; 2013, 4, 4; 129-141
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the efficiency of a dual-fuel gas turbine combustion chamber with a plasma‒chemical element
Autorzy:
Serbin, Serhiy
Diasamidze, Badri
Dzida, Marek
Chen, Daifen
Powiązania:
https://bibliotekanauki.pl/articles/32921246.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
gas turbine engine
power plant
dual-fuel combustion
combustion chamber
liquid fuel
gaseous fuel
plasma-assisted combustion
Opis:
The study is devoted to the possibility of increasing the efficiency of the working process in dual-fuel combustion chambers of gas turbine engines for FPSO vessels. For the first time, it is proposed to use the advantages of plasma‒chemical intensification of the combustion of hydrocarbon fuels in the dual-fuel combustion chambers, which can simultaneously operate on gaseous and liquid fuels. A design scheme of a combustion chamber with a plasma‒chemical element is proposed. A continuous type mathematical model of a combustion chamber with a plasma‒chemical element has been developed, which is based on the solution of a system of differential equations describing the processes of chemical reactions in a turbulent system, taking into consideration the initiating effect of the products of plasma‒chemical reactions on the processes of flame propagation. A modified six-stage kinetic scheme of hydrocarbon oxidation was used to simultaneously predict the combustion characteristics of the gaseous and liquid fuels, taking into account the decrease in the activation energy of carbon monoxide oxidation reactions when the products of the plasma‒chemical element are added. The results reveal that the addition of plasma‒chemical products significantly reduces CO emissions in the outlet section of the flame tube (from 25‒28 ppm to 3.9‒4.6 ppm), while the emission of nitrogen oxides remains practically unchanged for the studied combustion chamber. Further research directions are proposed to enhance the working process efficiency of a dual-fuel combustion chamber for gas turbine engines as part of the power plant of FSPO vessels.
Źródło:
Polish Maritime Research; 2023, 2; 68-75
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of alternative configurations of ship power systems using biofuels and renewable energy
Autorzy:
Herdzik, J.
Powiązania:
https://bibliotekanauki.pl/articles/24201481.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
biofuel
ship power systems
marine alternative fuels
carbon dioxide emission
energy efficiency indexes
renewable energy
dual and tri-fuel marine diesel engines
ship power system configuration
Opis:
The requirements to reduce emissions of carbon dioxide and other greenhouse gases from maritime transport require taking actions aimed at increasing the overall efficiency of the propulsion system, optimal and rational use of electricity and heat. Taking such actions is necessary in order to demonstrate the improvement of the energy efficiency index of a ship in operation or an already existing one (EEOI and EEXI), which will allow to obtain category A or B emissions for a given ship. Obtaining similar energy efficiency effects is also possible after switching to fuels containing less carbon in the molecule and the use of renewable energy. Attempts are made to create new configurations of combined energy systems so as to obtain maximum benefits related to the use of various energy sources in order to ensure the production of energy in quantities consistent with the current demand of the ship in the operating condition.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 3; 569--575
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual solutions for boundary layer flow of moving fluid over a moving surface with power-law surface temperature
Autorzy:
Mukhopadhyay, S.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/265215.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
przepływ konwekcyjny
przepływ płynu
temperatura powierzchni
forced convective flow
moving fluid
flat surface
power-law surface temperature
dual solutions
Opis:
An analysis of heat transfer for boundary layer forced convective flow past a moving flat surface parallel to a moving stream is presented. The power-law surface temperature at the boundary is prescribed. The surface temperature varying directly (or inversely) with power-law exponent is considered. The similarity solutions for the problem are obtained and the reduced ordinary differential equations are solved numerically. To support the validity of the numerical results, a comparison is made with known results from the open literature for some particular cases of the present study. When the surface and the fluid move in the opposite directions, dual solutions exist.
Źródło:
International Journal of Applied Mechanics and Engineering; 2013, 18, 1; 113-124
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Udział wiernych świeckich w kościelnej władzy rządzenia. Teoretyczne implikacje zagadnienia w praktyce
Participation of the lay faithful in the ecclesiastical governance. Theoretical implications of the issue in practice
Autorzy:
Michowicz, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/40026627.pdf
Data publikacji:
2024-04-25
Wydawca:
Wyższe Seminarium Misyjne Księży Sercanów
Tematy:
kościelna władza rządzenia
teoria unitarna
teoria dwubiegunowa
potestas a munere
Konstytucja apostolska Praedicate Evangelium
ecclesiastical power of governance
unitary theory
dual theory
Apostolic Constitution Praedicate Evangelium
Opis:
Artykuł jest przyczynkiem do doktrynalnej dyskusji, której przedmiotem – od czasów obrad II Soboru Watykańskiego – jest udział wiernych świeckich w kościelnej władzy rządzenia. Prócz obecnych w doktrynie teorii władzy autor wskazuje na koncepcję władzy domniemanej, rozumiejąc przez nią możliwe rozwiązanie narosłych przez lata problemów i kontrowersji. Niedawna nowelizacja prawa o Kurii Rzymskiej zdaje się potwierdzać intuicję dotyczącą zaproponowanej teorii potestas a munere, którą wzmacniają nadto wydarzenia dokumentujące powierzenie wiernym świeckim istotnych urzędów kościelnych.
The article is a contribution to the doctrinal discussion, the subject of which, since the Second Vatican Council, has been the participation of the lay faithful in the Church’s governing authority. In addition to the theories of power present in the doctrine, the author points to the concept of presumed power, understanding it as a possible solution to the problems and controversies that have accumulated over the years. The recent amendment to the law on the Roman Curia seems to confirm the intuition of the proposed theory of potestas a munere, which is further strengthened by some events documenting the entrustment of some important Church offices to lay faithful.
Źródło:
Sympozjum; 2023, 2(45); 65-85
2543-5442
Pojawia się w:
Sympozjum
Dostawca treści:
Biblioteka Nauki
Artykuł

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