Search results for "DP"
showing 10 items of 10968 documents
Survey data regarding perceived air quality in Australia, Brazil, China, Ghana, India, Iran, Italy, Norway, South Africa, United States before and du…
2020
The dataset deals with the air quality perceived by citizens before and during the enforcement of COVID-19 restrictions in ten countries around the world: Australia, Brazil, China, Ghana, India, Iran, Italy, Norway, South Africa and the United States. An online survey conveniently translated into Chinese, English, Italian, Norwegian, Persian, Portuguese collected information regarding the perceived quality of air pollution according to a Likert scale. The questionnaire was distributed between 11-05-2020 and 31-05-2020 and 9 394 respondents took part. Both the survey and the dataset (stored in a Microsoft Excel Worksheet) are available in a public repository. The collected data offer the peo…
Leading edge erosion of wind turbine blades: Effects of blade surface curvature on rain droplet impingement kinematics
2020
Abstract The issue of leading edge erosion (LEE) of wind turbine blades (WTBs) is a complex problem that reduces the aerodynamic efficiency of blades, and affects the overall cost of energy. Several research efforts are being made at the moment to counter erosion of WTBs such as-testing of advanced coating materials together with development of high-fidelity computational models. However, the majority of these studies assume the coated surfaces as flat, while the surface curvature and the shape of the aerofoil at the blade’s leading-edge exposed to such rain fields is neglected. The present study questions the assumption of a flat surface, in the context of LEE of WTBs, and provides guideli…
Novadpētniecības krājuma digitalizācija Latvijas bibliotēkās
2020
Novadpētniecība dod iespēju uzzināt vairāk par sev tuvajiem un vietu, no kurienes esam nākuši. Arvien biežāk sabiedrībā tiek norādīts uz digitālās vides vērtību un nozīmīgumu, līdz ar to bibliotēkām būtu jāpielāgojas, lai lietotājiem varētu piedāvāt vajadzīgo. Ir jāuzlabo bibliotēku novadpētniecības krājuma pieejamība attālināti. Pētījumā veiktās intervijas un kontentanalīze palīdz uzzinātu par veikto novadpētniecības krājuma digitalizācijas darbu bibliotēkās un kā varētu uzlabot digitalizācijas darbu. Pētījuma mērķis ir apskatīt un novērtēt digitalizācijas darbu bibliotēkās un izveidot bibliotēku novadpētniecības krājuma digitalizācijas modeli.
Vil økt fysisk aktivitet kunne redusere andelen trygdemottakere? : En case-studie basert på deltakere ved Aktiv på dagtid, Aust-Agder
2018
Masteroppgave offentlig politikk og ledelse ME502 - Universitetet i Agder 2018 This study is based on Aktiv pådagtid as an case study. The purpose of this study is to investigate the relationship between increased participation in physical activities directed by Aktiv på dagtid and the participants status in relation to working life. To better understand the relationship between these two variables, the study include three possible predictors:health, social support and self-efficacy.Thisstudy use a paper-based survey with 144 respondents, which represent the participants atAktiv på dagtid, who are at theage between 16-70, receive social security benefits and resides in the municipalities of…
Asymptotic behavior of an odd-order delay differential equation
2014
Published version of an article in the journal: Boundary Value Problems. Also available from the publisher at: http://dx.doi.org/10.1186/1687-2770-2014-107 Open Access We study asymptotic behavior of solutions to a class of odd-order delay differential equations. Our theorems extend and complement a number of related results reported in the literature. An illustrative example is provided.
Developing Algebraic Thinking in a Community of Inquiry : Collaboration between Three Teachers and a Didactician
2009
In this thesis I report from a study of the development of algebraic thinking of three teachers, from lower secondary school, and a didactician from a university in Norway (myself). The thesis offers an account of the relationship between the participants’ development of algebraic thinking and the processes related to the creation and development of a community of inquiry. In addition, the thesis presents elements of the relationship between the teachers’ development of algebraic thinking and their thinking in relation to their teaching practice. My theoretical framework was elaborated according to the criteria of relevance and coherence. In order to conceptualise the participants’ developm…
Logika algorytmów w świecie pracy ery technologicznej - nowe możliwości i nowe ograniczenia
2022
Uprawnienia kierownicze pracodawcy wynikające z przepisów prawa pracy są innej natury niż te kształtowane przez technologię, lokują one działanie kierownictwa pracodawcy w zupełnie innym obszarze niż technologia — w relacjach międzyludzkich, a nie w danych, w poleceniach, a nie w sygnałach, w odnoszeniu się do sposobów bycia jednostki, a nie do sprzężeń zwrotnych, do jej sumienności i staranności, a nie do nastawiania jej na wykorzystywanie. Kierownictwo technologiczne ma inne środki wyrazu, inną metodykę działania, inną skalę przymusu i porządku, jest inaczej zabezpieczane, nie zna granic, które stawia się kierownictwu normatywnemu. Technologia pozwala na zmianę paradygmatu kierownictwa dz…
Alkaline fuel cell technology - A review
2021
Abstract The realm of alkaline-based fuel cells has with the arrival of anionic exchange membrane fuel cells (AEMFCs) taken a great step to replace traditional liquid electrolyte alkaline fuel cells (AFCs). The following review summarises progress, bottleneck issues and highlights the most recent research trends within the field. The activity of alkaline catalyst materials has greatly advanced, however achieving long-term stability remains a challenge. Great AEMFC performances are reported, though these are generally obtained through the employment of platinum group metals (PGMs), thus emphasising the importance of R&D related to non-PGM materials. Thorough design strategies must be utilise…
LTE-based passive radars and applications: a review
2021
This paper provides an overview of the most recent passive radars based on long-term evolution (LTE). To begin, this paper investigates the various characteristics and requirements of 4 G LTE signals for radar, taking performance aspects such as range, velocity, range resolution, and velocity resolution into account. An ambiguity function analysis is performed on a measured LTE signal using the synchronization and reference signal components to evaluate key performance parameters such as Doppler and range characteristics. We also discuss how LTE passive radar can be used in a variety of applications. The detailed analysis of the LTE downlink signal, its structural overview, and the effect o…
Dynamic 2- and 3-connectivity on planar graphs
1992
We study the problem of maintaining the 2-edge-, 2-vertex-, and 3-edge-connected components of a dynamic planar graph subject to edge deletions. The 2-edge-connected components can be maintained in a total of O(n log n) time under any sequence of at most O(n) deletions. This gives O(log n) amortized time per deletion. The 2-vertex- and 3-edge-connected components can be maintained in a total of O(n log2n) time. This gives O(log2n) amortized time per deletion. The space required by all our data structures is O(n).