Eriarsti lähtetoetuse taotlemine on tehtud nooremarstisõbralikumaks

Eesti Arst 2014; 93(2):6

Validating EE.PIP-NEO-3 questionnaire and investigating relations between personality traits and excessive internet use

Käesolevas töös uuriti uue isiksuseküsimustiku EE.PIP-NEO-3 psühhomeetrilisi omadusi ja võrreldi neid EE.PIP-NEO (Mõttus, Pullmann & Allik, 2006) vastavate omadustega, et hinnata selle sobivust Suure Viisiku isiksuseomaduste mõõtmisel. Seejärel kasutati EE.PIP-NEO-3 küsimustikku, et uurida seoseid Suure Viisiku isiksuseomaduste ja interneti liigkasutamise vahel. Valimiks oli 1694 inimest, kes täitsid 256 küsimusega küsitluse, mille tulemusi analüüsiti. Järeldati, et kõik need EE.PIP-NEO-3 psühhomeetrilised omadused, mida selles töös uuriti, olid sarnased EE.PIP-NEO vastavatele omadustele ning seetõttu oli selle küsimustiku kasutamine isiksuseomaduste mõõtmisel antud töös õigustatud. Leiti, et interneti liigkasutamisel on positiivne korrelatsioon neurootilisusega ja negatiivne korrelatsioon meelekindluse, sotsiaalsuse ja ekstravertsusega. Avatuse puhul korrelatsiooni ei leitud

Fatigue assessment of thin superstructure decks

Economic reasons have motivated shipyards to look for new lightweight solutions. Going below the 5-mm plate thickness limit set by the classification societies for the superstructure decks of cruise ships could be one way to achieve the goal. However, the fatigue design of such large thin welded structures is challenging because of the higher initial production-induced distortions. Additionally, the fatigue assessment methods used for thicker welded plates are not fully validated for thinner ones. In this doctoral thesis a basis for the fatigue assessment of welded thin deck structures is provided by thoroughly investigating the effect of initial distortion and geometrical nonlinearity at different levels of analysis, i.e., the welded joint, stiffened panel, and hull girder levels. Extensive geometry measurements, fatigue tests, and geometrically nonlinear finite element (FE) analyses with 3-mm thick butt and fillet welded dog-bone specimens were carried out to define the experimental fatigue strength. Different welding methods were included in the study, leading to a wide variation in the misalignments. The influence of initial distortion on the structural stress in thin stiffened panels and on the hull girder behavior was studied using geometrically nonlinear FE analysis. The investigation showed that thin welded specimens differ from thicker ones in their larger initial distortions and curved shapes. This significantly affects the straightening effect of the specimen, i.e., the decrease of the structural-to-nominal stress ratio under tension loading. When the actual shape of the specimen and the geometrical nonlinearity were included in the analysis, a fatigue strength similar to that of thicker welded plates was obtained. The stiffened panels behaved linearly under the elastic load range, but the initial distortion shape had a major effect on the structural stress and should therefore be considered. The hull girder analyses revealed that the effect of initial distortion and geometrical nonlinearity on the load-carrying mechanism and on the panel loading is small, and that acceptable accuracy can be obtained without including them. The results show that the current industry standard for fatigue assessment is applicable for the hull girder but not for the stiffened panel and the welded joint analyses. This thesis presents the early efforts towards thinner superstructure decks in modern cruise ships. Before their implementation becomes possible, validation with full-scale stiffened panels or even larger prototype structures is needed to obtain the actual initial distortion shapes and resulting stress distributions, as well as to understand the effects of mean and residual stress. Also, the ultimate strength of the hull girder with thin superstructure decks should be checked

Miinimumelatis alaealise lapse elatise arvutamise vahendina – abinõude kriitika ja lahendused

https://www.ester.ee/record=b5245386~S

Sotsiaalse toetuse mõju vanuselise diskrimineerimise tajumisele vanemas eas

Käesoleva bakalaureusetöö eesmärgiks oli saada ülevaade sotsiaalse toetuse mõjust vanuselise diskrimineerimise tajumisele vanemaealiste seas. Uurimuse teostamiseks viidi läbi kvantitatiivne andmeanalüüs Euroopa Sotsiaaluuringu 2008. aasta Eesti andmete põhjal. Analüüsi põhitulemused olid järgmised: Töötavatel vanemaealistel on võrreldes mittetöötavatega suurem tõenäosus tajuda diskrimineerimist vähesel määral. Eakaaslastest aktiivsematel sotsiaalsetes tegevustes osalejatel on võrreldes eakaaslastega võrdselt aktiivsete vanemaealistega suurem tõenäosus kinnitada tugevat diskrimineerimise tajumist. Eakaaslastest vähem aktiivsetel sotsiaalsetes tegevustes osalejatel on suurem tõenäosus tajuda diskrimineerimist vähesel määral kui eakaaslastest aktiivsematel vanemaealistel. Lähedastega sagedasti (korra nädalas, mitu korda nädalas või iga päev) kohtuvatel vanemaealistel on suurem tõenäosus kinnitada diskrimineerimise tajumist vähesel määral kui harva (mitte kunagi või harvemini kui korra kuus) lähedastega kohtuvatel vanemaealistel. Korra või mitu korda kuus lähedastega kohtuvatel vanemaealistel on suurem tõenäosus tajuda tugevat diskrimineerimist kui korra nädalas, mitu korda nädalas või iga päev lähedastega kohtuvatel vanemaealistel. Isiklike asjade arutamist võimaldavate inimeste puudumine suurendab tõenäosust tajuda tugevat diskrimineerimist. Antud töös ei leidnud kinnitust vanuse, soo ja erinevas vanuses kolleegidega töötamise seos vanuselise diskrimineerimise tajumisega.http://www.ester.ee/record=b4497982*es

Central part interpolation schemes for a class of fractional initial value problems

We consider an initial value problem for linear fractional integro-differential equations with weakly singular kernels. Using an integral equation reformulation of the underlying problem, a collocation method based on the central part interpolation by continuous piecewise polynomials on the uniform grid is constructed and analysed. Optimal convergence order of the proposed method is established and confirmed by numerical experiments

Intraneti efektiivsuse hindamine Elioni näitel

The objective of bachelor thesis „Methods for measuring intranet effectiveness using Elion as an example“ was to define intranet effectiveness, describe characteristics of intranet effectiveness and describe methods for measuring intranet effectiveness. Two methods were chosen for further study and practical testing in order to analyse their usability in Estonian context. The psychological methods – intranet check list by Murgolo- Poore and semantic differentiate method were addressed intranet users’ perception of the por- tal. The survey was conducted in a telecommunications firm Elion. I was able to establish that these methods can be adapted for measuring intranet effective- ness and have practical value in Estonian context, but both need further adjusting and study. I trust that measuring intranet effectiveness will get more attention in Estonian organisa- tions. It is important that methods are adopted that consider the specifics of intranet because they help better understanding of the individual intranet of organisations and set strategy for development. Also they give grounds for justification of the needs for intranet development and resources to the executives that hold the resources. The overall result is more effective intran- ets.http://tartu.ester.ee/record=b1737707~S1*es

Fredholmi integraalvõrrandi lahendi tükiti konstantne aproksimatsioon

Käesolevas magistritöös vaadeldakse teist liiki Fredholmi integraalvõrrandi ligikaudset lahendamist meetodil, mis tugineb võrrandi lahendi tükiti konstantsele aproksimatsioonile. Töö eesmärk on uurida esitatud meetodi koonduvust ning koonduvuskiirust