Search results for "characteristics"

Comparison of the smile perception and smile characteristics among Latvian and Uzbek population

2021

Šī pētījuma mērķis bija: 1) izpētīt Latvijas un Uzbekistānas iedzīvotāju smaida raksturojumu 20-35 gadu vecuma grupā, 2) un salīdzināt smaida pašvērtējumu Latvijas un Uzbekistānas iedzīvotāju vidū. Metodes: 1) Tika uzņemtas piecdesmit dalībnieku no Latvijas un piecdesmit dalībnieku no Uzbekistānas pilna smaida fotogrāfijas, kurās novērtēja smaida estētiskās īpašības (smaida tips, smaida simetrija, smaidā parādīto zobu skaits, augšžokļa priekšzobu malas novietojums attiecībā pret apakšlūpu, tika pētīts augšžokļa incisīvu izliekums attiecībā pret apakšlūpu). 2) Lai novērtētu dalībnieku smaida pašnovērtējumu, tika izveidota anketa latviešu, uzbeku, angļu un krievu valodā. Dalībniekiem tika nos…

Does it take two to tango? Factors related to the ease of societal uptake of scientific knowledge

2016

Science policy increasingly focuses on maximising societal benefits from science and technology investments, but often reduces those benefits to activities involving codifying and selling knowledge, thereby idealising best practice academic behaviours around entrepreneurial superstars. This paper argues that societal value depends on knowledge being used, making knowledge's eventual exploitation partly dependent upon on whether other users-societal or scientific-can use that knowledge (i.e. on how far new knowledge is cognate with users' existing knowledge). When scientists incorporate user knowledge into their research processes, what we call 'open research behaviours', their knowledge may…

Experimental observation of the rule of flexible vegetation on erosion processes

2012

Vegetation altering hydrodynamic conditions of an open channel flow controls the exchanges of sediment, nutrients and contaminants. Thus, the knowledge of the hydraulic characteristics of flow over vegetation is very important to support the management of fluvial processes. But, the analysis of the hydrodynamic conditions is complex because vegetation is flexible in varying degrees and it oscillates in the flow changing position. Furthermore, because of temporal changing of roughness due to natural vegetative growth, the response of vegetation to the flow can change in time. Many theoretical and experimental investigations have been performed in order to analyze both the mean flow and turbu…

Flow characteristics in a vegetated flume

2008

Vegetation altering hydrodynamic conditions of an open channel flow controls the exchanges of sediment, nutrients and contaminants. Thus, the knowledge of the hydraulic characteristics of flow over vegetation is very important to support the management of fluvial processes. In this paper the flow over real flexible vegetation is experimentally studied. A 2D-ADV (Acoustic Doppler Velocimeter) is used to measure the local flow velocities for different vegetation concentrations and varying the discharge and the flume slope. The flow velocity measures are used to test the hyperbolic tangent profile of a pure mixing layer and to evaluate the mixing-layer parameters. The formation of turbulence s…

Temporal dynamic of biofilms enhances the settlement of the central-Mediterranean reef-builder Dendropoma cristatum (Biondi, 1859).

2021

Abstract Research on marine invertebrate settlement provides baseline knowledge for restoration technique implementation, especially for biogenic engineers with limited dispersion ability. Previously, we determined that the maturity of a biofilm strongly enhances the settlement of the vermetid reef-builder Dendropoma cristatum. To elucidate settlement-related biofilm features, here we analyse the structure and composition of marine biofilms over time, through microscopic observations, eukaryotic and prokaryotic fingerprinting analyses and 16S rDNA Illumina sequencing. The vermetid settlement temporal increase matched with the higher biofilm coverage on the substratum and the reduction of th…

Flow characteristics and dynamic responses of a parked straight‐bladed vertical axis wind turbine

2019

Abstract With the development of urbanization and the application of renewable energy, wind turbine is becoming an important approach for wind energy reservation and utilization. This study provides a numerical investigation on understanding the surface pressure distribution, flow characteristics and dynamic responses of a parked straight‐bladed vertical axis wind turbine (VAWT), which is helpful for its design. Together with the two‐way coupling method between simulation platforms such as STAR‐CCM+ and ABAQUS, the SST k‐ω turbulence model is used to obtain the surface pressure and surrounding flow of the VAWT, and the finite element method is used to obtain the dynamic responses of its str…

Correction: Corrigendum: Long-term, open-labeled extension study of idursulfase in the treatment of Hunter syndrome

2013

CORRIGENDUM: Long-term, open-labeled extension study of idursulfase in the treatment of Hunter syndrome

The evolution of collective infectious units in viruses

2019

Viruses frequently spread among cells or hosts in groups, with multiple viral genomes inside the same infectious unit. These collective infectious units can consist of multiple viral genomes inside the same virion, or multiple virions inside a larger structure such as a vesicle. Collective infectious units deliver multiple viral genomes to the same cell simultaneously, which can have important implications for viral pathogenesis, antiviral resistance, and social evolution. However, little is known about why some viruses transmit in collective infectious units, whereas others do not. We used a simple evolutionary approach to model the potential costs and benefits of transmitting in a collect…

Adolescents' alcohol use and smoking in Beijing, China : implementing the HBSC study and comparing socioeconomic inequalities with Finland

2013

On Non-Gaussian limiting laws for certain statistics of Wigner Matrices

2013

This paper is a continuation of our papers [12-14] in which the limiting laws of fluctuations were found for the linear eigenvalue statistics Tr j(M(n)) and for the normalized matrix elements √n̅jjj(M(n)) of differentiable functions of real symmetric Wigner matrices M(n) as n →∞. Here we consider another spectral characteristic of Wigner matrices, xnA [j] = Tr j(M(n))A(n), where {A(n)}∞n=1 is a certain sequence of non-random matrices. We show first that if M(n) belongs to the Gaussian Orthogonal Ensemble, then xnA [j] satisfies the Central Limit Theorem. Then we consider Wigner matrices with i.i.d. entries possessing the entire characteristic function and find the limiting probability law f…