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Tytuł:
The Kolmogorovs microscale eddies in a compound channel
Mikrowiry Kołmogorowa w korycie o złożonym przekroju poprzecznym
Autorzy:
Koziol, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/81595.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:
Investigations of the longitudinal sizes of the smallest eddies (Kolmogorov’s microscale) presented in the paper are based on measurements of instantaneous velocities in a hydraulic laboratory in a compound trapezoidal channel with different roughness conditions (smooth bed, rough bed) and with trees system on the floodplains. Sizes of the smallest eddies varied in the ranges of 0.08 to 0.48 mm. The changes of longitudinal sizes of the floodplain microeddies are not caused by: the increase of floodplain roughness, the presence of trees, but only when the main channel bed is smooth, and they are also not caused by the increase of roughness of the main channel sloping banks. However, the increase of the size of the floodplain microeddies is influenced by trees, when the roughness of the floodplains and the main channel sloping banks are identical. The increase of microeddies size in the main channel is infl uenced by: the increase of the main channel sloping banks roughness, by the presence of trees on the floodplains, but only when the roughness of the floodplains and the main channel sloping banks are identical. Microeddies are larger in the main channel centerline than on the floodplains, and the smallest ones were present in the main channel/floodplain interface. The calculated values of microeddies reached decimal parts of a millimeter, and that is why it is difficult to prove vital changes of their values, caused by bed roughness and floodplain trees influence.
W artykule przedstawiono długości podłużnych mikrowirów (mikroskala Kołmogorowa) w strumieniu w korycie o złożonym przekroju poprzecznym. Długości mikrowirów obliczono na podstawie szybkości dyssypacji energii i lepkości cieczy. Do określenia szybkości dyssypacji wykorzystano analizę funkcji gęstości spektralnej, wyznaczonej na podstawie pomierzonych w laboratorium hydraulicznym chwilowych prędkości w korycie o złożonym przekroju poprzecznym dla dwóch różnych szorstkości powierzchni dna koryta i rozmieszczonych drzew na przyległych terenach zalewowych. Na zmiany podłużnych długości mikrowirów na terenie zalewowym nie wpływa: wzrost chropowatości powierzchni terenów zalewowych, występowanie drzew ale kiedy powierzchnia koryta głównego jest gładka, wzrost chropowatości powierzchni skarp koryta głównego. Natomiast na wzrost długości mikrowirów na terenie zalewowym wpływają drzewa kiedy powierzchnie terenów zalewowych i skarp koryta głównego są identyczne. Na wzrost długości mikrowirów w korycie głównym wpływa: wzrost chropowatości powierzchni skarp koryta głównego, występowanie drzew na terenach zalewowych ale kiedy powierzchnie terenów zalewowych i skarp koryta głównego są identyczne. Mikrowiry są większe w osi symetrii koryta głównego niż na terenach zalewowych, a najmniejsze w płaszczyźnie rozdziału pomiędzy obiema częściami koryta. Obliczone wartości mikrowirów są rzędu dziesiątych części milimetra, więc trudno mówić o istotnych zmianach wartości w wyniku wpływu chropowatość powierzchni dna i obecności drzew na terenach zalewowych.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2012, 44, 2
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Turbulent kinetic energy of water in a compound channel
Turbulentna energia kinetyczna strumienia wody w korycie o złożonym przekroju poprzecznym
Autorzy:
Koziol, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/81867.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2011, 43, 2
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Architecture as an indicator of territorial conflicts, globalisation and unification
Autorzy:
Gawlikowska, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/115741.pdf
Data publikacji:
2015
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
architecture
territorial conflicts
economic conflicts
globalisation
colonial architecture
decolonization
hybrid architecture
architektura
konflikty terytorialne
konflikty ekonomiczne
globalizacja
architektura kolonialna
dekolonizacja
architektura hybrydowa
Opis:
The paper discusses architecture as a marker of two selected types of conflicts. The first type described are conflicts rooted in a dispute over a territory. Territorial conflicts result in the transpositions of architectural styles, their merges and evolutions. Based on colonial architecture, the author gives examples of the aggressors’ architectural practices, which are treating the local design in various manners: elimination, acceptance or conscious use. Subsequently to colonialism, the paper discusses decolonisation and globalisation, which lead to the unification of architecture all over the world. This, as the article shows, is related to the transformations of global economy. The paper discusses examples of architectural styles and tendencies, which are triggered by economic factors, including the architecture of international corporations, and modular container building. Finally, the paper comments on architecture portraying economic discrepancies, reflecting extreme luxury and poverty. The author comments on the clash between elitist skyscrapers and slums in large metropolises. The article discusses social phenomena that stem from this clash and, most importantly, portrays architecture as an agent and a victim of territorial and economic conflicts.
Źródło:
Challenges of Modern Technology; 2015, 6, 4; 43-48
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of the energy efficiency and renewability in applying heat pumps, referring to the European Union Directive
Problem efektywności i odnawialności energetycznej stosowania pomp ciepła w świetle dyrektywy Unii Europejskiej
Autorzy:
Barbacki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/385761.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
pompy ciepła
dyrektywa UE
energia odnawialna
heat pumps
EU directive
renewable energy
Opis:
The article presents the requirements contained in the European Union Directive 2009/28/WE for the systems such as heat pumps to be able to classify their effect as the management of renewable energy. The Directive also introduces a legal requirement that the installations with heat pumps are energy efficient. Only pumps fulfilling the mentioned above conditions shall be regarded as using energy from renewable resources the value of which will be considered at calculating the contribution of renewable energy in the total gross energy production. In this context also the speculations concerning the issues of renewability, emission and economics during the exploitation of heat pumps were presented. The general conclusion form the presented speculations is that both the level of renewability, emission and economics of the application of heat pumps are strictly connected with the high value of the coefficient of performance (COP), depending on climatic conditions and the applied low temperature source.
Artykuł prezentuje zawarte w dyrektywie unijnej 2009/28/WE wymogi, jakie powinny spełniać systemy pomp ciepła, aby ich działanie można było uznać za sprzyjające zagospodarowaniu energii ze źródeł odnawialnych. Dyrektywa wprowadza również prawny wymóg, aby instalacje z zastosowaniem pomp ciepła były energetycznie efektywne. Jedynie pompy spełniające ww. warunki zostaną uznane za zagospodarowujące energię z zasobów odnawialnych, której wartość będzie uwzględniana przy obliczaniu udziału energii odnawialnej w całkowitej produkcji energii brutto. W tym kontekście przedstawiono również rozważania dotyczące zagadnień odnawialności, emisyjności oraz ekonomiki podczas eksploatacji pomp ciepła. Generalnym wnioskiem wynikającym z przedstawionych rozważań jest to, że poziom odnawialności, emisyjności i ekonomiki stosowania pomp ciepła jest ściśle związany z odpowiednio wysoką wartością współczynnika efektywności energetycznej COP, zależnego od warunków klimatycznych oraz zastosowanego źródła dolnego.
Źródło:
Geomatics and Environmental Engineering; 2011, 5, 3; 27-35
1898-1135
Pojawia się w:
Geomatics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Delays in Technology Development: Their Impact on the Issues of Determinism, Autonomy and Controllability of Technology
Autorzy:
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/307976.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
autonomy
change of episteme
delay time
determinism and controllability of technology
impacts of informational revolution
paradigm of philosophy of technology
technology development and evaluation
Opis:
The paper provides a discussion of diverse delays occurring in technology development, and an explanation of reasons why, when seen holistically from outside, the process of technology development might appear as an autonomous, self-determining, uncontrollable process. When seen from inside, however, the process is far from being uncontrollable. This paradox is explained by the fact that technology development contains many processes with delays, in total amounting sometimes to fifty years; when seen from outside, such a process might appear uncontrollable, even if it is very much controllable when approached internally and in detail. Therefore, the definition and types of technology creation as well as stages of technological processes are discussed in some detail in this paper. Some aspects of the contemporary informational revolution and some recent results on micro-theories of knowledge and technology creation are also reviewed. It is suggested that one of possible ways of changing the paradigmatic attitude of philosophy of technology is to invite some such philosophers to participate in the development of modern tools of knowledge civilization era, such as software development and evaluation. The conclusions of the paper stress the need of essentially new approaches to many issues in the time of informational revolution.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 4; 5-16
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Socio-Economic Challenges from and for Future Internet
Autorzy:
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/309170.pdf
Data publikacji:
2010
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
Future Internet
informational revolution
socioeconomic changes and challenges
Opis:
There are several papers available addressing the challenges for Future Internet that result from socio-economic aspects; such challenges must be obviously taken into account when constructing and developing Future Internet. This paper, however, takes an opposite view that from the dynamics of the development of Internet itself (or Future Internet) result challenges for the socio-economic development and even for the paradigm of understanding economy; such challenges must be taken into account first, then - in a feedback loop -lead to the modification of socio-economic challenges for Future Internet. This change of perspective is necessary because the analysis of socio-economic challenges for Future Internet is typically based on a classical paradigm of equilibrium economics. While useful, this paradigm is limited and has been shown incomplete, e.g., by the recent world-wide financial and economic crisis. This paper shows that the informational revolution - including but not limited to the development of Internet - has already changed the behavior of main socio-economic agents as well as of economic markets and our understanding of them; thus, new perspectives are needed. The paper also shows that a useful perspective is that not of expected benefits from Future Internet - there are many such benefits and they will surely motivate enough economic development of Future Internet - but of socio-economic threats resulting from the dynamic development of the Internet. There are several such threats and conflicts that can be foreseen: the conflict between corporatization and governance; the conflict between direct and indirect limits to freedom; the trend to- wards elitarism inherent in Internet development dynamics versus democracy; the threat of network and computer domination over people, etc. Some of such threats and conflicts are discussed in the paper.
Źródło:
Journal of Telecommunications and Information Technology; 2010, 2; 5-14
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of ambient intelligence and decision support for telecommunications
Autorzy:
Wierzbicki, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/309275.pdf
Data publikacji:
2002
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
ISTAG
ambient intelligence
decision support for telecommunications
Opis:
The paper presents first the concept of AmI (ambient intelligence) and AmI scenarios of ISTAG (Information Society Technology Advisory Group of European Commission). The requirements of intelligence versus decision support are then discussed. Resulting challenges for decision support systems (DSS) in telecommunications are then outlined and conclusions presented.
Źródło:
Journal of Telecommunications and Information Technology; 2002, 3; 3-6
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elaboration of stochastic models to comprehensive evaluation of occupational risks in complex dynamic systems
Autorzy:
Bochkovskyi, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/1818802.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
safety management
health management
dynamic systems
Markov drift processes
risk evaluation
occupational risk
zarządzanie bezpieczeństwem
zarządzanie zdrowiem
układy dynamiczne
modele stochastyczne
ocena ryzyka
ryzyko zawodowe
Opis:
Purpose: Elaborate stochastic models to comprehensive evaluation of occupational risks in “man - machine - environment” systems taking into account the random and dynamic nature of the impact on the employee of negative factors over time. Design/methodology/approach: Within study, the methods of probability theory and the theory of Markov processes - to find the limit distribution of the random process of dynamic impact on the employee of negative factors over time and obtain main rates against which the level of occupational risks within the "man - machine - environment" systems can be comprehensively evaluated; Erlang phases method, Laplace transform, difference equations theory, method of mathematical induction - to elaborate a method of analytical solution of the appropriate limit task for a system of differential equations in partial derivatives and appropriate limit conditions were used. Findings: A system of differential equations in partial derivatives and relevant limit conditions is derived, which allowed to identify the following main rates for comprehensive evaluation of occupational risks in systems "man - machine - environment": probability of excess the limit of the employee's accumulation of negative impact of the harmful production factor; probability of the employee’s injury of varying severity in a random time. An method to the solution the limit task for a system of differential equations, which allows to provide a lower bounds of the probability of a certain occupational danger occurrence was elaborated. Research limitations/implications: The elaborated approach to injury risk evaluation is designed to predict cases of non-severe injuries. At the same time, this approach allows to consider more severe cases too, but in this case the task will be more difficult. Practical implications: The use of the elaborated models allows to apply a systematic approach to the evaluation of occupational risks in enterprises and to increase the objectivity of the evaluation results by taking into account the real characteristics of the impact of negative factors on the employee over time. Originality/value: For the first time, a special subclass of Markov processes - Markov drift processes was proposed and substantiated for use to comprehensive evaluation of occupational risks in “man - machine - environment” systems.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 104, 1; 31--41
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elaboration of occupational risks evaluation models considering the dynamics of impact of harmful factors
Autorzy:
Bochkovskyi, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/1818829.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
safety management
health management
Markov drift processes
stochastic models
risk evaluation
occupational risk
zarządzanie bezpieczeństwem
zarządzanie zdrowiem
modele stochastyczne
ocena ryzyka
ryzyko zawodowe
Opis:
Purpose: Elaborate and substantiate stochastic models of occupational risk evaluation for application in the occupation health and safety. Design/methodology/approach: Analysis of scientific and technical literature and regulatory framework for risk evaluation in the occupation health and safety; methods of probability theory, theory of Markov processes; methods of restoration theory. Findings: A system of differential equations and limit conditions for finding the limit distribution of probabilities of a random process of occupational dangers is derived. Based on the results of solving the limit value task, expressions to determine a number of key indicators by which the level of occupational risk can be evaluated are obtained. Research limitations/implications: The proposed approach aims to evaluation the risk associated with the impact on the employee of harmful factors, but can also be used to evaluate the injury risk. But in this case the received limit value task will be much more difficult. Practical implications: The application of the proposed approach allows to increase the level of occupational safety by taking into account the stochastic characteristics of the negative factors impact on the employee during occupational risks evaluating, as well as the possibility of setting such values of controllable parameters that will allow with a certain probability to ensure not to exceed the level of impact accumulation in the employee of the consequences of these factors. Originality/value: Stochastic models of occupational risk evaluation based on the application of Markov drift processes for the modeling the hybrid nature of the negative factors impact on the employee, which occurs within the real systems "man - technical system - production environment" were elaborated and substantiated for the first time.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 102, 2; 76--85
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The scope and conditions of the European Unions innovation policy
Autorzy:
Wiatrak, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/29432173.pdf
Data publikacji:
2017
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2017, 17[32], 4; 316-325
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determinants of legal development strategies
Uwarunkowania strategii rozwoju lokalnego
Autorzy:
Wiatrak, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/38121.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Acta Scientiarum Polonorum. Oeconomia; 2018, 17, 1
1644-0757
Pojawia się w:
Acta Scientiarum Polonorum. Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The problem of objective ranking: foundations, approaches and applications
Autorzy:
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/308101.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
subjective ranking
objective ranking
reference point approaches
objectivity
Opis:
The paper starts with the discussion of the issue of objectivity versus subjectivity, stressing that while an absolute objectivity is not attainable, nevertheless trying to be as objective as possible constitutes a higher value, necessary for hard science and technology. Dangers and errors of the subjectivist reduction of objectivity to power and money attempted by the postmodern sociology of science are discussed. Then we turn to the problem of subjective versus objective decision analysis and ranking. It is shown that while all classical decision theory aims at a rational analysis and support of subjective decisions, there are important application cases, particularly in managerial problems, when the decision maker prefers to avoid specifying her/his preferences and needs decision analysis - e.g., ranking of decision options - that is as objective as possible. An approach to decision support that might be easily adapted for such objective ranking is the reference point methodology; its application is shown on examples. One of these examples is actually not an application of the methodology, but a real life problem that motivated the development of objective ranking. The examples illustrate that objective ranking might be important for management, including also management of telecommunication networks.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 3; 15-23
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges before National Institute of Telecommunications after fifty years of its activity
Autorzy:
Wierzbicki, A.P.
Powiązania:
https://bibliotekanauki.pl/articles/308406.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
National Institute of Telecommunications
mission
research programme
Opis:
In the year 2001 we celebrate the fifty anniversary of the activity of National Institute of Telecommunications under its present name (in Polish: Instytut Łączności). Although we can date earlier the beginnings of the Institute, we will not present here its detailed history that is discussed in other papers. This paper presents rather the transformation of the Institute in last years, resulting from the systemic transformation of Poland. We describe: new mission of the Institute, the results of structural changes of the Institute in last five years, an outline of long-term research programme. Finally, the paper addresses the challenges before the Institute on the verge of the new millennium.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 2; 3-9
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technology and change: the role of information technology in knowledge civilization
Autorzy:
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/308922.pdf
Data publikacji:
2006
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
knowledge civilization era
philosophy of technology
definition of technology
technology proper versus its system of social applications
hard sciences
relation between technology
soft social sciences and humanities
Opis:
The paper presents a reflection on the role of technology and, in particular, information technology in the era of knowledge civilization. Diverse perceptions of this era, the concepts of three civilization eras versus three waves, of a cultural platform versus an episteme of a civilization era, of a big change at the end of industrial civilization era are outlined. The first principle of cultural anthropology and the concept of cultural imperialism are recalled. The contemporary philosophy of technology is shortly reviewed. An interpretation of Die Technik und die Kehre of M. Heidegger from a technological point of view is given. It is shown that we should distinguish technology proper from the system of its socio-economic applications, and that the relation of technology proper to hard science and to socio-economic applications of technology forms two positive feedback loops; the one of socio-economic applications might be more dan- gerous in cases of social infatuation with technological possibilities or other misapplications of technology. It is shown that the technology of knowledge civilization era will differ from that of industrial era in proposing boundless number of diversified technological possibilities; thus, the Heideggerian warning against social infatuation with technological possibilities must be not only repeated, but also modified and strengthened.
Źródło:
Journal of Telecommunications and Information Technology; 2006, 4; 3-14
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Telecommunications, multiple criteria analysis and knowledge theory
Autorzy:
Wierzbicki, A. P.
Powiązania:
https://bibliotekanauki.pl/articles/309016.pdf
Data publikacji:
2005
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
decision support
intuition
knowledge creation
knowledge integration and management
tacit knowledge
ontology
epistemology
technology creation
telecommunications
Opis:
Telecommunications requires multiple criteria analysis and decision support. It is shown how some basic facts from telecommunications and informational sciences can be used to formulate a rational theory of intuition, developed as a complement of multiple criteria decision support. This paper presents a method called creative space used for integrating various approaches to knowledge creation and based on SECI spiral, I5 system and rational theory of intuition. Questions of supporting new technology creation by constructing specialized creative environments similar to decision support environments are also indicated.
Źródło:
Journal of Telecommunications and Information Technology; 2005, 3; 3-13
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł

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