Search results for "link"

Evolutionary trade-offs in a small mammal : a quantitative genetics approach

2017

Limited resources force individuals to trade-off between life-history traits. A vast diversity of life-history strategies, which optimally combine life history traits, can be found. Knowledge of the genetic basis of this phenotypic variation is key to understanding evolutionary processes. I approached life-history evolution by estimating quantitative genetic parameters for a set of life-history traits in the bank vole (Myodes glareolus). The work is based on a laboratory-kept colony subjected to two-way selection for litter size (High- (H) and Low- (L) lines). Costs of the created reproductive strategies were observed in natural conditions. Selection increased the difference in litter size …

Analysis of MAC-level throughput in LTE systems with link rate adaptation and HARQ protocols

2015

LTE is rapidly gaining momentum for building future 4G cellular systems, and real operational networks are under deployment worldwide. To achieve high throughput performance, in addition to an advanced physical layer design LTE exploits a combination of sophisticated mechanisms at the radio resource management layer. Clearly, this makes difficult to develop analytical tools to accurately assess and optimise the user perceived throughput under realistic channel assumptions. Thus, most existing studies focus only on link-layer throughput or consider individual mechanisms in isolation. The main contribution of this paper is a unified modelling framework of the MAC-level downlink throughput of …

Äänitteen elinkaari levymyyntilistalla ja radiosoittolistalla sekä listojen välinen suhde

2000

Redzes asuma, refrakcijas un radzenes biezuma izmaiņas dažādās keratokonusa stadijās pēc kroslinkinga operācijas

2017

Bakalaura darbs ir uzrakstīts latviešu valodā uz 26 lappusēm, satur 16 attēlus, 4 tabulas un atsauces uz 28 literatūras avotiem. Mērķis: analizēt kroslinkinga rezultātus dažādās keratokonusa stadijās. Metode: noteikt labāko iespējamo koriģēto refrakcijas korekciju, nekoriģēto redzes asumu un radzenes biezumu. Rezultāti: statistiski nozīmīga atšķirība ir I pakāpes keratokonusa pacientu nekoriģētajam redzes asumam (P=0,029), visu pacientu vidējām pahimetrijas izmaiņām (P=0,004), I pakāpes pacientu sfēriskā ekvivalenta izmaiņām (P=0,045). Atslēgas vārdi: keratokonuss, kroslinkings, redzes asums, radzenes biezums, refrakcija.

Radzenes biomehānisko parametru izmaiņas pēc kroslinkinga pacientiem ar keratokonusu

2019

Ievads: Pateicoties mūsdienu tehnoloģijām iespējams noteikt radzenes biomehāniskos parametrus, kurus klīniski var pielietot daudziem mērķiem. Piemēram, tādējādi iespējams diagnosticēt radzenes ektātiskās slimības jau to agrīnajās stadijās, proti, pirms parādās klīniskie simptomi un izmaiņas topogrāfijā, tostarp uzraudzīt slimības gaitu, izvērtēt terapijas efektivitāti, kā arī izvairīties no keratektāzijas pēc refraktīvās ķirurģijas. Pētījuma mērķis: Noteikt radzenes biomehāniskos parametrus keratokonusa pacientiem pirms un pēc radzenes kolagēna-kroslinkinga (CXL) 12 mēnešu periodā, pamatojoties uz Corvis ST (OCULUS Optikgeräte GmbH, Vācija) ierīces datiem. Balstoties uz iegūtajiem datiem, i…

Data from: Genomics of speciation and introgression in Princess cichlid fishes from Lake Tanganyika

2016

How variation in the genome translates into biological diversity and new species originate has endured as the mystery of mysteries in evolutionary biology. African cichlid fishes are prime model systems to address speciation-related questions for their remarkable taxonomic and phenotypic diversity, and the possible role of gene flow in this process. Here, we capitalize on genome sequencing and phylogenomic analyses to address the relative impacts of incomplete lineage sorting, introgression and hybrid speciation in the Neolamprologus savoryi-complex (the ‘Princess cichlids’) from Lake Tanganyika. We present a time-calibrated species tree based on whole-genome sequences and provide strong ev…

The roles of job and worker restructuring in aggregate wage growth dynamics

2019

We propose an approach for measuring and analyzing the dynamics of the standard aggregate wage growth of macro statistics with micro data. Our method decomposes the aggregate wage growth into the wage growth of job stayers and into various terms related to job and worker restructuring. This method produces explicit expressions with clear interpretations for the various restructuring components. Using comprehensive longitudinal employer–employee data, we study how job and worker restructuring influence the aggregate wage growth and its cyclicality. The results highlight the importance of drawing a sharp distinction between job and worker restructuring in the analysis of aggregate wage growth…

LASERI-seurantatutkimus: Liikunta-aktiivisuus lapsuudesta aikuisuuteen ja sen yhteydet muihin elintapoihin

2018

LASERI-tutkimuksessa kartoitetaan nyt, miten liikunta-aktiivisuus elämän eri vaiheissa on yhteydessä muihin elintapoihin. Voisiko liikuntaaktiivisuuden lisääntyminen olla reitti esimerkiksi parempiin ravintotottumuksiin tai vähäisempään tupakointiin? nonPeerReviewed

Unique Problems Require Unique Solutions—Models and Problems of Linking School Effectiveness and School Improvement

2022

The article aims to outline the proposals for linking school effectiveness research and school improvement that are currently relevant in international discussion and to ask how they deal with the ‘technology deficit’ at the level of model improvement. We will first show the difference between school improvement and school effectiveness. Then, we outline areas showing basic problems associated with linking school effectiveness and school improvement. After that, we present a summary of two relevant models for linking school effectiveness research and school improvement—Comprehensive Framework of Effective School Improvement and Dynamic Model of Educational Effectiveness&md…

Toward a stage theory of adaptive social media use : explaining change in facebook use

2018

Existing research on information technology (IT) use has shown that post- adoptive technology use is not a stable but a dynamic phenomenon in which users apply various adaptation behaviors. Users reshape the technology (IT adaptation), adjust their work routines (task adaptation), and change their own behavior (user adaptation) according to the changes induced by IT. Today, people use increasingly social media and other IT for personal purposes. Facebook (FB) is a good example of personal IT that people voluntarily use for years and has become an integral part of people’s everyday lives. Despite extensive research on IT use and IT/user adaptation, we know little about the dynamics of post-a…