Search results for "ERT"
showing 10 items of 21537 documents
Ar vilcienu kustību saistīto risku pārvaldība un preventīvie risinājumi.
2020
Darbā ir pētīta ar vilcienu kustību saistīto darba vides risku ietekme uz strādājošajiem kravas vilcienu konduktoriem. Darbs sastāv no 4 daļām. Literatūras analīzē izskatīta un analizēta pieejamā literatūra par ar vilcienu kustību saistīto risku pārvaldību, preventīvajiem pasākumiem, darba vides riskiem kravas vilcienu konduktoru darba vidē. Otrajā daļā aprakstītas pētījumā lietotās metodes. Trešajā daļā ir veikta darba vides risku novērtēšanas, nelaimes gadījumu un darbinieku aptaujas analīze. Ceturtajā daļā - izstrādāti preventīvie un aizsardzības pasākumi. Pētījuma rezultāti ļauj secināt, ka kravas vilcienu konduktori pakļauti gan traumatisma, gan fizikālo, gan fizisko darba vides riska …
Traumatisma riska faktori pārstrādes iekārtu operatoru darbā, to samazināšanas iespējas LEAN sistēmas ietvaros
2017
Maģistra darba tēma – Traumatisma riska faktori pārstrādes iekārtu operatoru darbā, to samazināšanas iespējas LEAN sistēmas ietvaros. Darba autore: Jolanta Maņihina. Darba zinātniskais vadītājs: asoc. prof., Dr. sc.admin. Henrijs Kaļķis. Darbs izklāstīts uz 94 lpp., ietver 31 attēlu, 13 tabulas, 8 pielikumus, 59 informatīvos avotus. Maģistra darbs sastāv no trīs daļām. Pirmajā daļā ir apkopota un analizēta literatūra par izplatītākajiem traumatisma darba vides riska faktoriem papīra un papīra izstrādājumu ražošanas un iespieddarbu izgatavošanas (poligrāfijas) nozarē, aplūkoti to cēloņi, ietekme uz nodarbināto veselību, kā arī veikta analīze, kā, ieviešot uzņēmuma darbībā LEAN sistēmas rīkus…
Geochemistry and mineralogy of travertine deposits of the SW flank of Mt. Etna (Italy): Relationships with past volcanic and degassing activity.
2007
Trends in perceived school stress among adolescentsin five Nordic countries 2002–2014
2019
Abstract Associations between school-related stress and poor health, risk behaviours and low well-being are well documented. The aim of this paper was to estimate trends of perceived school stress experienced by boys and girls of different ages in the Nordic countries, and to describe trends in school stress between the Nordic countries. Nordic data from the Health Behaviour in School-aged Children study (HBSC) between 2002 and 2014 were used. The participants were aged 11–16 years. School stress was measured by a single item; “How pressured do you feel by schoolwork?” The participants answering “some” or “a lot” were categorised as reporting school stress. Sweden, Norway and Denmark had …
The Impact of a 1,2,3-Triazole Motif on the Photophysical Behavior of Non-K Tetrasubstituted Pyrene with a Substitution Pattern Providing the Long Ax…
2022
1,3,6,8-Tetrasubstituted pyrene derivatives with two types of substituents (4-(2,2-dimethylpropyloxy)pyridine, 1-decyl-1,2,3-triazole, 1-benzyl-1,2,3-triazole, and pyrazole), substituted in such a way that provides the long axial symmetry, are prepared and characterized in the present study. To the best of our knowledge, the pyrene derivative containing the same heteroaryl motif (triazole) but substituted by two various alkyls, straight decyl and benzyl-based side chains (C), is reported for the first time. For comparison, compounds with one kind of triazole motif and substituted pyridine or pyrazole groups were prepared (A and B). The photophysical properties of all molecules were evaluate…
Organocatalytic Enantioselective Vinylogous Henry Reaction of 3,5-Dimethyl-4-nitroisoxazole with Trifluoromethyl Ketones
2017
The enantioselective vinylogous Henry reaction of 3,5-dimethyl-4-nitroisoxazole with trifluoromethyl ketones employing a bifunctional squaramide organocatalyst has been developed. A series of isoxazole bearing trifluoromethyl-substituted tertiary alcohols, 2-substituted (R)-1,1,1-trifluoro-3-(3-methyl-4-nitroisoxazol-5-yl)propan-2-ols, were obtained under these mild reaction conditions in good yields and moderate to good enantioselectivities
Prevalencia de la enfermedad de Chagas en donantes y en mujeres embarazadas procedentes de Latinoamérica: estudio epidemiológico
2021
El objetivo de la tesis fue conocer la prevalencia de la enfe5rmedad de Chagas en población de riesgo de ambos sexos procedentes de Latinoamérica y la incidencia de la transmisión vertical (Chagas congénito en los bebés nacidos de mujeres diagnosticadas durante el periodo de estudio. Se diseñó un estudio epidemiológico transversal, descriptivo, con dos cohortes poblacionales (donantes de sangre y mujeres embarazadas) y dos fases temporales, una prospectiva (2006-2010) y otra retrospectiva (2011-2015. Los datos demográficos básicos y los resultados sobre el diagnóstico de la enfermedad de Chagas fueron facilitados por los laboratorios de los centros participantes en el estudio (Centro de tra…
Esferocitosis hereditaria en niños: análisis de las características clínicas, analíticas, terapéuticas y evolutivas. Evaluación de nuevas técnicas di…
2023
La Esferocitosis Hereditaria (EH) es la anemia hemolítica crónica más frecuente en el mundo. Se produce por una alteración de las proteínas de membrana del eritrocito, lo que le confiere una menor capacidad para deformarse al hematíe y por tanto una vida media más corta. La hemólisis crónica mantenida produce anemia, ictericia y esplenomegalia. La EH se puede dividir en grupos según su gravedad (leve, moderado, grave) en función de sus valores de hemoglobina, reticulocitos y bilirrubina. La enfermedad de Gilbert se produce por una disminución de la glucuronización de la bilirrubina, produciendo un aumento de bilirrubina e ictericia clínica. Su asociación con la EH será uno de los objetivos …
Benthic foodweb structure in a large shallow lake studied by stable isotope analysis
2014
The benthic foodweb structure of Lake Võrtsjärv, a large (270 km2), shallow, and turbid Estonian lake, was evaluated based on C and N stable-isotope signatures (δ13C, δ15N). Variation in δ13C between sampling sites was not related to site proximity to the littoral zone or the more vegetated southern part of the lake, but rather appeared to be influenced by in-situ site peculiarities. δ13C was stable temporally and between functional feeding groups, a result implying that the whole benthic food web of the lake relies largely on the same C source admixture, essentially particulate organic matter (POM). Thus, the foodweb composition of Lake Võrtsjärv is remarkably homogeneous given the lake’s …
Exploring the Relationship Between Trust and Business Start-Ups in 52 Countries Over 16 Years
2021
A well-functioning social network involves attributes such as honesty, benevolence, fairness and confidence. When this network – trust - has formed, participants can count on reliable and consistent economic transactions. This has the effect of higher level of co-operation, but also co-dependence. Strong social networks, as measured in this study by the degree of interpersonal trust and trust in institutions, are foundational elements for societies wishing to progress to new higher levels of entrepreneurship and development. In a pooled OLS of up to 52 countries and 16 years, this study estimates how changes in interpersonal trust and trust in institutions affect new business creation. The …