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Earth Bricks with Halloysite Nanoclay: Research and Experimentation for the Sustainability of Materials

2021

The paper illustrates the experimentation activities on rammed earth and nanotechnologies conducted by the authors. The experimental research was carried out with the aim of improving the performance of rammed earth bricks with clay nanotubes, creating a ‘new material’ with reduced embodied energy and low CO2 emissions into the atmosphere. Specifically, the analysed performances are related to the compressive strength that expand their area of use as a building material.

STRUCTURAL OPTIMIZATION AND STRUCTURAL ANALYSIS OF COMPOSITE MATERIAL PANEL FOR NAVAL USE

2008

The purpose of the work is the realization of a composite material with long glass fibers having better characteristic than a fiber random composite, to permit the reduction of weight and costs to shipyards for pleasure craft. Structural optimization is performed by ANSYS for the choice of the layers disposition to obtain the maximum stiffness with minimum material employment, saving weight. The study is centered on the research of the better configurations of plies packing in relation of pure shear stress for four different plies. Unidirectional plies, both symmetric orthotropic and symmetric non-orthotropic ones, are realized successively by the vacuum bag technique. Experimental tests of…

Achilles tendon viscoelastic properties and mechanical responses to a single bout of exercise

2014

Mass spectrometric analysis of heavy and base oils

2018

Base oil production from crude oil has become more complex as demanded product properties, yield objective and field competition have increased interest in research towards high viscosity index (VI) base oils. Conventional lubricant grade base oil enjoyed biggest market share until 2000-2004 but now high VHVI product demands have introduced also novel production methods for heavy-type base oils such as Ficsher-Tropsch method based gas-to-liquid (GTL) and poly-internal-olefin (PIO) base oils. In this MSc, different mass spectrometric methods for heavy and base oils where compared and in-house field ionization method was characterized and method validation was begun. Base oil mass analytics u…

Farewell to Anarchy : The Myth of International Anarchy and Birth of Anarcophilia in International Relations

2018

This article scrutinizes the conceptual history of international anarchy. The argument purported here is that even though the idea of international anarchy is often seen as very central for the academic discipline of international relations, the concept is in fact not found from the forerunners or classics of the discipline. The assumption of international anarchy is commonly seen as a defining feature of a Realist school of international relations. Yet, the concept and especially its “Realist” implications are not to be found in the classics of Realism, from Thucydides, Machiavelli or Hobbes. The idea of “international anarchy” emerges quite tentatively during the First World War, in the w…

Tiešsaistes sociālais tīkls

2019

Tīmekļvietne “I recommend” ir sistēma, kura ir izstrādāta priekš studentu korporācijām, Šajā sistēmā tās lietotāji var izveidot ieteikumus priekš saviem sekotājiem. Šī darba mērķis ir izveidot sistēmu, kurā šīs sistēmas lietotājs, var iegūt ieteikumus sadalītus pa kategorijām, kā produktīvi pavadīt savu brīvo laiku. Ieteikumu kategorijās ietilpst vietas, filmas, izklaide, ētika, ēdiens, sports, zinātne, mūzika, literatūra un cits. Tīmekļvietne ir veidota Ruby programmēšans valodā ar Ruby on Rails ietvaru, sistēmas dati ir uzglabāti PostgreSQL datu pārvaldības sistēmā.

Personāla atlases sistēma

2018

Šīs dokuments ir kvalifikācijas darba ietvaros izstrādātas tīmekļa personāla atlases lietotni Recruiting dokumentācija, kas ietver sevī prasību specifikāciju, projektējumu, testēšanas dokmentāciju, kā arī konfigurācijas pārvaldību un darbietilpības novērtējumu. Kvalifikācijas darba mērķis ir izstrādāt tīmekļa lietotni, kas var nodrošināt uzņēmumiem iespēju vienkāršāk un atrāk apstrādāt pieteikumus uz vakancēm. Lietotne izstrādāta, izmantojot Microsoft ASP.NET Core 2.0 atvērtā koda tīmekļa ietvaru.

Methodical redesign of a semitrailer

2005

Subtropical streams harbour higher genus richness and lower abundance of insects compared to boreal streams, but scale matters

2018

Aim: Biological diversity typically varies between climatically different regions, and regions closer to the equator often support higher numbers of taxa than those closer to the poles. However, these trends have been assessed for a few organism groups, and the existing studies have rarely been based on extensive identical surveys in different climatic regions. Location: We conducted standardized surveys of wadeable streams in a boreal (western Finland) and a subtropical (south-eastern Brazil) region, sampling insects identically from 100 streams in each region and measuring the same environmental variables in both regions. Taxon: Aquatic insects. Methods: Comparisons were made at the scale…

The use of pumice lightweight concrete for masonry applications

2011

In the last two decades, the use of pumice as lightweight aggregate for concrete in structural applications has been the object of different studies. The aim was to find out if pumice can be an alternative to ordinary lightweight aggregate. The present paper is framed in this context. Here, a study is presented showing the use of pumice for making lightweight concrete units for masonry members. Through the paper, the formulation of a mix design for lightweight concrete is proposed. Then the obtained mechanical characteristics of the masonry units are discussed and compared to the code requirements. Reinforced bearing masonry walls, made with the concrete masonry units in question, were made…