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Tytuł:
Reliability Evaluation of Transmission Planetary Gears “bottom-up” approach
Autorzy:
Živković, Predrag
Milutinović, Miroslav
Tica, Milan
Trifković, Spasoje
Čamagić, Ivica
Powiązania:
https://bibliotekanauki.pl/articles/24200801.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
planetary gear
failure rate
reliability
bottom-up
Opis:
The reliability study is the most important part of the engineering design process, as it is the basis of analysis and assessment of future product performance in exploitation. Since performance cannot be predicted with absolute certainty, the application of reliability theory includes probability theory and unreliability modeling. The proposed approach has been applied to assess the reliability of gear planetary power transmissions. The assessment of system reliability was determined on the basis of the block diagram method, as a function of the reliability of individual components, calculated by statistical analysis. Using the Weibull model, the reliability of the planetary gear was defined on the basis of the probability of failure of the gear teeth and the results were interpreted to assess the reliability of the component and the entire planetary train. For a more precise assessment of reliability and to avoid modeling every failure and mode of occurrence, a competitive risk model was developed. The reliability assessment study was conducted with a “bottom-up” approach. Reliability has been assessed, for instantaneous, estimated and assigned failures rate of planetary train and component.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 1; art. no. 2
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The market model of CDO spreads
Autorzy:
Gątarek, D.
Petrov, V.
Stavrou, A.
Powiązania:
https://bibliotekanauki.pl/articles/206047.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
CDO pricing
Marshall-Olkin copula
bottom-up approach
Opis:
In this paper we present a new arbitrage-free bottomup model of correlated defaults, based on a special approach to systematic and idiosyncratic risks for individual obligors. The model admits several attractive features, like consistency with currency and interest rate models, as well as numerical tractability and flexibility, making it capable to fit the market for practically all self consistent CDO tranche prices. Its background is rather remote from other approaches, like copulas and point processes, so our presentation is detailed.
Źródło:
Control and Cybernetics; 2015, 44, 1; 149-162
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of PLGA microspheres’ microstructure for application as cell carriers in modular tissue engineering
Autorzy:
Mielan, B.
Krok-Borkowicz, M.
Pielichowska, K.
Pamuła, E.
Powiązania:
https://bibliotekanauki.pl/articles/285127.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
regenerative medicine
cell cultures
bottom-up
PLGA
emulsification
Opis:
Microspheres (MS) made of resorbable polymer have been proposed as a cell growth support. They may be assembled to form cell constructs or be suspended in hydrogels allowing injection into injury location. High relative surface area of MS provides more efficient cell culture environment than traditional culture on flat substrates (multiwell plates, Petri dishes). In addition, MS structure, topography and surface chemistry can be modified to promote cell adhesion and proliferation. The aim of this study was to obtain resorbable poly(L-lactide-co-glycolide) (PLGA) MS and to modify their properties by changing manufacturing conditions of the oil-in-water emulsification to better control structural and microstructural properties of MS and their biological performance. To this end, water phase was modified by addition of NaCl to change ionic strength, while oil phase by addition of polyethylene glycol (PEG). Microstructural and thermal properties were assessed. Cytocompatibility tests and cell cultures with MG-63 cells were conducted to verify potential relevance of MS as cell carriers. The results showed that it is possible to obtain cytocompatible MS by oil-in-water emulsification method and to control diameter, porosity and crystallinity of MS with the use of additives to oil and/or water phases without negative changes in MS cytocompatibility. The results prove that modification of both phases make it possible to produce MS with desired/controllable properties like surface topography, porosity and crystallinity.
Źródło:
Engineering of Biomaterials; 2017, 20, 140; 7-11
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Getting to the bottom of L2 listening instruction: Making a case for bottom-up activities
Autorzy:
Siegel, Joseph
Siegel, Aki
Powiązania:
https://bibliotekanauki.pl/articles/780987.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
listening pedagogy
bottom-up listening activities
dictation
listening proficiency
Opis:
This paper argues for the incorporation of bottom-up activities for English as a foreign language (EFL) listening. It discusses theoretical concepts and pedagogic options for addressing bottom-up aural processing in the EFL classroom as well as how and why teachers may wish to include such activities in lessons. This discussion is augmented by a small-scale classroom-based research project that investigated six activities targeting learners’ bottom-up listening abilities. Learners studying at the lower-intermediate level of a compulsory EFL university course were divided into a treatment group (n = 21) and a contrast group (n = 32). Each group listened to the same audio material and completed listening activities from an assigned textbook. The treatment group also engaged in a set of six bottom-up listening activities using the same material. This quasi-experimental study used dictation and listening proficiency tests before and after the course. Between-group comparisons of t-test results of dictation and listening proficiency tests indicated that improvements for the treatment group were probably due to the BU intervention. In addition, results from a posttreatment survey suggested that learners value explicit bottom- up listening instruction.
Źródło:
Studies in Second Language Learning and Teaching; 2015, 5, 4; 637-662
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated development plan – connecting architectural design and spatial planning
Zintegrowany plan inwestycyjny – sprzężenie projektowania architektonicznego i planowania przestrzennego
Autorzy:
Wardęski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/27313960.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
integrated design
integrated development plan
spatial planning
architectural design
bottom-up integration
projektowanie zintegrowane
zintegrowany plan inwestycyjny
planowanie przestrzenne
projektowanie architektoniczne
integracja bottom-up
Opis:
The integrated investment plan is to be, after the amendment of the Act on Spatial Planning and Development, a new tool allowing for the development of urbanization opportunities initiated by private and institutional entities. This paper traces the background of design theory in terms of interdisciplinary integration mechanisms within spatial disciplines, and examines how ZPI can use these mechanisms. An initial attempt at a critical assessment and perspectives that emerge in connection with the expected introduction of this legal regulation was made, thus commenting on one of the first ways of legally sanctioned initiation of planning regulations by organized urban or architectural design.
Zintegrowany plan inwestycyjny ma być, po nowelizacji ustawy o planowaniu i zagospodarowaniu przestrzennym, nowym narzędziem pozwalającym na wypracowywanie możliwości urbanizacji inicjowanych przez podmioty prywatne i instytucjonalne. W niniejszej pracy prześledzono tło teorii projektowania pod kątem mechanizmów integracji wewnątrz dyscyplinarnej, w obrębie dyscyplin zajmujących się przestrzenią, a także zbadano w jaki sposób ZPI może te mechanizmy wykorzystywać. Podjęto wstępną próbę oceny krytycznej oraz perspektyw, które rysują się w związku ze spodziewanym wprowadzeniem tej regulacji prawnej, w ten sposób komentując jeden z pierwszych sposobów prawnie usankcjonowanego inicjowania regulacji planistycznych przez zorganizowane projektowanie urbanistyczne lub architektoniczne.
Źródło:
Przestrzeń i Forma; 2023, 54; 121--136
1895-3247
2391-7725
Pojawia się w:
Przestrzeń i Forma
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Redemocratization efforts in Hungary as a second try: civil society organizations and mass movements
Autorzy:
Agh, Atilla
Powiązania:
https://bibliotekanauki.pl/articles/473320.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
democratic innovations
redemocratization
bottom-up democratization
participatory movements
regular mass demonstrations
Opis:
This paper tries to argue that Hungary has been the classical case for the decline of demo- cracy, including the marginalization and the state control of civil society that may be turned into the redemocratization efforts in the spirit of “bottom-up democratization”. This decline of democracy has been accomplished by the Orbán governments since 2010 given their two-thirds supermajority that has allowed them to introduce a new Constitution without national consent and without approval by referendum. The radical change in legislation has also concerned the regulation of civil society organizations and the freedom of the media. As a result, a strong resistance has emerged against this increasing authoritarian rule, pro- ducing a series of democratic innovations and has promised a second try of democratization.
Źródło:
Problemy Polityki Społecznej. Studia i Dyskusje; 2015, 31(4); 9-35
1640-1808
Pojawia się w:
Problemy Polityki Społecznej. Studia i Dyskusje
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Listening in Older Second Language Learners: The Teachers’ Perspective
Autorzy:
Słowik, Agata
Powiązania:
https://bibliotekanauki.pl/articles/954163.pdf
Data publikacji:
2017
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
SLA
top-down and bottom-up listening
geragogy
older adults
teachers’ perspective
Opis:
There are various theories, strategies and techniques regarding teaching different language skills. At the same time, as practice shows listening remains the most challenging skill for the educators to teach effectively and for the learners to master. Moreover, both the learners and their teachers have their own, not infrequently rather disparate, subjective theories, as well as learning and teaching preferences. Older adult learners are a peculiar case as they are a very diverse group, aware of their needs and cognitive abilities. At the same time, their teachers are unfortunately often unaware of these needs and do not adapt the materials to suit their students. The aim of this paper is, thus, to present the opinions of the teachers of older adult students and to provide basis for future research. 
Źródło:
Journal of Education Culture and Society; 2017, 8, 1; 148-163
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technological interface of the city – The promise of a real bottom-up urban planning?
Autorzy:
Filip, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/115473.pdf
Data publikacji:
2015
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
city
interface
technology
bottom-up
urban development
miasto
ICT
technologia
rozwój miast
urbanistyka
Opis:
The paper shows how developing social networking services, geo-media applications, e-management tools, and even some particular types of web ‘games’ may contribute to the creation of technological interfaces of our cities. Nevertheless, the paper calls into question whether these technological environments may contribute to the real change in urban planning – the change from the top-down to the bottom-up approach.
Źródło:
Challenges of Modern Technology; 2015, 6, 2; 57-62
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using BBC Learning English Podcasts to develop university students listening skills
Autorzy:
Davydenko, Olena
Powiązania:
https://bibliotekanauki.pl/articles/1927548.pdf
Data publikacji:
2021-12-22
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
podcast
taxonomy
listening comprehension
bottom-up processing
top-down processing
prior knowledge
background information
Opis:
The emergence of podcasts in an English foreign language (EFL) setting is seen as a helpful aid to foreign language learning. Using podcasts might help improve language learning efficiency. This research addresses how podcasts can be an alternative means of improving English listening comprehension for university students. The study was carried out at Nizhyn Gogol State University, Ukraine, using quantitative and qualitative methods of analyzing data. To collect the data, research tools such as a questionnaire, initial and final testing, and observation were used. The procedure was introduced for a group of first-year students and implemented for six weeks. Special BBC Learning English podcast activities were designed and offered to the students. The main stages have been specified in the process of developing students’ listening skills. In the pre-listening stage, students do preparation activities to prepare for the podcast using their background knowledge. The while-listening stage is aimed at listening for gist, listening for details, making inferences, and summarizing. In the post-listening stage, the listeners are taken beyond the podcast content and set tasks which contribute to integrating other language skills. Samples of activities which correspond to these three stages are provided. A balanced approach to choosing top-down or bottom-up processing within the stages improves the process of forming competencies in listening of first-year students. Hence, based on the positive results of this study, BBC Learning English podcasts with meaningful, appropriate, and interesting activities attract the students’ attention, increase their motivation, and improve their listening comprehension.
Źródło:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2021, 92, 5; 26-35
1731-6758
1731-7428
Pojawia się w:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Twenty Years Working with Neighbours. Citizen Participation, Is It Possible? What We Have Learned in 20 Years
Autorzy:
Remesar, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/666102.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
citizen participation
urban governance
public space
urban design
public art
urban regeneration
bottom-up processes
Opis:
In 1999, the Governing Council of the Universitat de Barcelona approved the creation of the POLIS Research Center. Later, in 2016, the Center was ratified after passing an assessment of the Catalan Accreditation Agency (AGAUR). The Centre has an interdisciplinary vocation and brings together researchers from different research groups at the University of Barcelona and cooperates with nine European and Ibero-American universities in the fields of Arts, Architecture and Human and Social Sciences. Academically, the Centre has promoted the doctoral program Public Space and Urban Regeneration (1998–2017) and the Master’s Degree in Urban Design: Art, City, Society (since 2007) and the publication of the journal On the w@terfront. The research object of the Centre is the city and its public space and, more specifically, the role of citizens in the production of Public Art and Urban Design. For this reason, the work of the Centre covers the topics related to Urban Regeneration, Sustainability, Urban Governance, Civic Remembrance, Heritage. Throughout its twenty-year history, the Centre has developed a series of projects for citizen participation in various areas of the periphery of Barcelona: River Besòs (municipality of Sant Adrià de Besòs) La Mina neighbourhood (municipality of Sant Adrià de Besòs) and the Barcelona’s neighbourhoods of Baró de Viver and Bon Pastor. A characteristic of the work of the centre has been, and is, the endorsement of citizen participation, through an innovative approach based on enabling the creative empowerment of the neighbours within the framework of Participatory Action Research. This approach is based on a project methodology, as it is understood in various project disciplines from Art to Architecture, from Design to Engineering. This article, associated with the itinerant exhibition “20 years working with neighbours,” reviews the founding project carried out by the Centre, “Social Uses of the River Besòs” (1997–1999), analysing the lessons learned, with the aim of clarifying the research criteria that the Centre follows for the development of citizen participation projects.
Źródło:
Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica; 2019, 33; 11-36
0208-6107
2353-9631
Pojawia się w:
Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does Philosophy Require De-Transcendentalization? Habermas, Apel, and the Role of Transcendentals in Philosophical Discourse and Social-Scientific Explanation
Autorzy:
Michalska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1033750.pdf
Data publikacji:
2019-12-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
citizen participation
urban governance
public space
urban design
public art
urban regeneration
bottom-up processes
Opis:
The heritage of transcendental philosophy, and more specifically its viability when it comes to the problematic of the philosophy of social sciences, has been a key point of dissensus between Jürgen Habermas and Karl-Otto Apel. Whereas Apel has explicitly aimed at a transcendental-pragmatic transformation of philosophy, Habermas has consequently insisted that his formal pragmatics, and the theory of communicative action which is erected upon it, radically de-transcendentalizes the subject. In a word, the disagreement concerns whether transcendental entities have any substantial role to play in philosophical discourse and social-scientific explanations. My aim is to reconstruct how Apel establishes a connection between transcendentals, qua the ideal communicative community and the possibility of non-objectifying self-reflection. As I shall demonstrate, the principles that transcendental pragmatics sees as underlying social actions are not to be understood in a strictly judicial way, as “supernorms.” Rather, they should be conceptualized and used as a means for action regulation and mutual action coordination. Against this backdrop, I show that the concept of the ideal community provides the necessary underpinnings for Habermas’ schema of validity claims and the project of reconstructive sciences.
Źródło:
Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica; 2019, 34; 11-30
0208-6107
2353-9631
Pojawia się w:
Acta Universitatis Lodziensis. Folia Philosophica. Ethica – Aesthetica – Practica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving reading fluency and comprehension in adult ESL learners using bottom-up and top-down vocabulary training
Autorzy:
Oliver, Rhonda
Young, Shahreen
Powiązania:
https://bibliotekanauki.pl/articles/780685.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
reading fluency
comprehension
isolated word training
bottom-up strategy
context word training
top-down strategy
Opis:
The current research examines the effect of two methods of vocabulary training on reading fluency and comprehension of adult English as second language (ESL) tertiary-bound students. The methods used were isolated vocabulary training (bottom-up reading) and vocabulary training in context (topdown reading). The current exploratory and quasi-experimental study examines the effectiveness of these methods in two intact classes using pre- and posttest measures of students’ reading fluency and comprehension. The results show that bottom-up training had a negative impact on fluency and comprehension. In contrast, top-down training positively affected fluency but had no impact on comprehension. Further, the results do suggest that fast-paced reading may potentially lead to improved comprehension. These findings have implications for the type of language instruction used in classrooms and, therefore, for teachers of adult ESL learners.
Źródło:
Studies in Second Language Learning and Teaching; 2016, 6, 1; 111-133
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parental Movements in Poland as the Bottom-up Formsof Action: Success or Failure? The Cases of First Quarter Mothers and Save the Little Ones
Autorzy:
Polkowska, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/942316.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
parental movement
new social movement
dialogue
bottom-up forms of action
First Quarter Mothers
Save the Little Ones
Opis:
This article is focused on two parental movements that have appeared in Poland: First Quarter Mothers and Save the Little Ones. Both of these movements demanded changes in the law (or to prevent such changes) because, in parents' opinion, the assumptions behind the intended reforms were contrary to their childrens interest. The conducted analysis showed that both exhibit the characteristics of social movements. Parents are aware of their strength and know that acting together can have an impact on the social reality, legal change and government decisions. Analyzed movements showed that the institutional forms of dialogue slowly come to the end, and instead of them the bottom-up forms of action become increasingly important.
Źródło:
Warsaw Forum of Economic Sociology; 2014, 5, 9; 55-68
2081-9633
Pojawia się w:
Warsaw Forum of Economic Sociology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trust and control manifestations in employee- driven innovations
Autorzy:
Padzik-Wołos, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/27313511.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
trust
control
employee-driven-innovations
bottom-up innovation
manifestations
zaufanie
kontrola
innowacje napędzane przez pracowników
innowacje oddolne
przejawy
Opis:
Purpose: The goal is to deepen understanding of trust and control in employee-driven innovations (EDI) and is met by empirical research basing on key informants’ narration. Design/methodology/approach: Nineteen interviews with key informants were conducted between March and June 2021 in three companies from different sectors (telecommunication, pharmaceutical and financial). Findings: This publication contributes to the existing literature on EDI and trust-control in multiple ways. First, it reveals lack of direct reference to trust in employees’ discourse on EDI. Second, it highlights manifestations of trust and control along with fit into Das and Teng (2001) framework. Third, it reveals differences among researched companies in terms of breakdown of trust and control types, which poses further questions about factors impacting these differences. Fourth, it shows that social control manifestations are not recognized. Research limitations/implications: Research limitation stems from the method, which does not allow to make generalizations. Manifestations of social control in Das and Teng (2001) model were not recognized in the research, which opens a future research avenue. Future research could investigate impersonal trust in the context of EDI. Practical implications: The research proves important role of general managerial support, identified in the literature on innovations and trust. Originality/value: The article proposes categorization of trust and control manifestations and fit into types of trust and control in Das and Teng (2001) model, which originally presents relations between trust, control and risk types in collaboration between alliance partners.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 162; 561--582
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bottom-up learning of hierarchical models in a class of deterministic POMDP environments
Autorzy:
Itoh, H.
Fukumoto, H.
Wakuya, H.
Furukawa, T.
Powiązania:
https://bibliotekanauki.pl/articles/330566.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
partially observable system
Markov decision process
hierarchical model
bottom up learning
układ częściowo obserwowalny
decyzyjny proces Markowa
model hierarchiczny
Opis:
The theory of partially observable Markov decision processes (POMDPs) is a useful tool for developing various intelligent agents, and learning hierarchical POMDP models is one of the key approaches for building such agents when the environments of the agents are unknown and large. To learn hierarchical models, bottom-up learning methods in which learning takes place in a layer-by-layer manner from the lowest to the highest layer are already extensively used in some research fields such as hidden Markov models and neural networks. However, little attention has been paid to bottom-up approaches for learning POMDP models. In this paper, we present a novel bottom-up learning algorithm for hierarchical POMDP models and prove that, by using this algorithm, a perfect model (i.e., a model that can perfectly predict future observations) can be learned at least in a class of deterministic POMDP environments.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 3; 597-615
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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