Search results for "abs"
showing 10 items of 6504 documents
Total absorption γ-ray spectroscopy of the β-delayed neutron emitters 87Br, 88Br, and 94Rb
2017
We investigate the decay of 87,88Br and 94Rb using total absorption γ -ray spectroscopy. These important fission products are β-delayed neutron emitters. Our data show considerable βγ intensity, so far unobserved in high-resolution γ -ray spectroscopy, from states at high excitation energy. We also find significant differences with the β intensity that can be deduced from existing measurements of the β spectrum. We evaluate the impact of the present data on reactor decay heat using summation calculations. Although the effect is relatively small it helps to reduce the discrepancy between calculations and integral measurements of the photon component for 235U fission at cooling times in the r…
The Ti-influence on the tourmaline color
2008
Titanium was examined in different black tourmalines by spectrophotometric analyses in the region between 12500 and 27000 cm-1 (800-370 nm) using a microscope spectrophotometer MPV-5P, Leitz (Germany), and chemically analyzed on an electron microprobe Camebax Microbeam, Cameca (France) in WDS Mode. Fourteen tourmaline samples with their face oriented parallel to the principal axis, cut and polished down to thin sections, showed polarized spectra of two broad absorption bands at approximately 14000 cm-1 (715 nm) and 24000 cm-1 (417 nm). Precision thickness measurements were used to calculate the absorption coefficients α. For the absorption around 24000 cm-1, a linear correlation was observe…
Minimizing fleet operating costs for a container transportation company
2006
Abstract This paper focuses on a fleet management problem that arises in container trucking industry. From the container transportation company perspective, the present and future operating costs to minimize can be divided in three components: the routing costs, the resource (i.e., driver and truck) assignment costs and the container repositioning costs (i.e., the costs of restoring a given container fleet distribution over the serviced territory, as requested by the shippers that own the containers). This real-world problem has been modeled as an integer programming problem. The proposed solution approach is based on the decomposition of this problem in three simpler sub-problems associate…
Latvijas Universitātes 2021. gada pārskats
2022
Musculoskeletal disorders and disability among forest industry workers in lower and higher sickness absence groups: a case-control study
2019
Background: Musculoskeletal wellbeing and disorders and explanatory factors were investigated among forest industry employees. Methods: A new positive approach to maintenance of working ability focuses on being present at work. 140 individuals with low sickness absence (≤1.5% in hours during the past 6.5 years) and 140 controls with higher sickness absence (>1.5%), randomly selected from the source population (n = 636) in workplace clusters (n = 5), were studied. Questionnaire data on functioning, musculoskeletal disorders (MSD) and disability, work ability and wellbeing were collected (response rate 65%) during December 2012–January 2013. 183 employees (mean age 48.5; females 32%) particip…
Kształcenie dualne jako nowa jakość kształcenia zawodowego w Polsce
2016
Studia dualne to w krajach Europy Zachodniej niezwykle popularna forma kształcenia, która wychodzi naprzeciw oczekiwaniom pracodawców i studentów. Coraz częściej wzbudza zainteresowanie polskich firm i studentów. Dzięki studiom dualnym, czyli nauce w formie praktycznej, student po ukończeniu nauki jest w pełni przygotowany do pracy. Absolwenci, którzy w trakcie nauki zawodu byli zatrudnieni u pracodawcy, skuteczniej znajdują pracę, lepiej zarabiają, a co ważniejsze, szybciej awansują. W opracowaniu dokonano charakterystyki kształcenia dualnego w Polsce na tle innych krajów europejskich.
Comparison of impact characteristics of different ice hockey arena dasher boards
2012
During last years the incidence and severity of ice hockey related concussions have been increased and, hence, something should be done to stop this growth. The main aim of this study was to find out how dasher board materials and structures affect impact characteristics and, thereby, the risk of concussions. The measurements were divided into two parts; in the first part, the physiological characteristics of body checks were determined in real game measurements, and the second part, consisted of simulation of body checks in the laboratory. High speed cameras and accelerometers were used to collect data. More flexible protective shielding material (dasher board B) resulted in lower peak for…
A Religious End of Metaphysics? Heidegger, Meillassoux and the Question of Fideism
2016
Videi draudzīgu sapropeļa skaņas absorbcijas kompozītmateriālu izveide un to mikrobioloģiskā noturība
2021
Bakalaura darba “Videi draudzīgu sapropeļa skaņas absorbcijas kompozītmateriālu izveide un to mikrobioloģiskā noturība” ietvaros kopumā tika izveidoti 100 videi draudzīgu kompozītmateriālu paraugi, kā materiālu saistvielu, izmantojot organiskus ezera nogulumus (sapropeli), kā pildvielas izmantojot sfagnu sūnas, lina šķiedru un vermikulītu. Materiāliem arī tika pievienotis biocīds un tā dabīgais aizvietotājs – SIA ALINA produkts “ALINA LIFETM” organomāli. Darba teorētiskajā daļā tika apkopota zinātniskā literatūra par videi draudzīgiem kompozītmateriāliem un videi draudzīgas būvniecības piemēriem, materiālu mikrobioloģisko rezistenci, iekštelpu mikrobioloģisko piesārņojumu un vides piesārņoj…
Le vignoble gallo-romain de Gevrey-Chambertin "Au-dessus de Bergis", Côte d'Or (Ier-IIe s. ap. J.-C.) : Modes de plantation et de conduite de vignes …
2011
Recent excavations at " Au-dessus de Bergis " in Gevrey-Chambertin (Burgundy, France) brought to light in 2008 and 2009 numerous, rectangular aligned pits interpreted as an ancient vineyard dated from the mid-first, mid-second century to the third century AD. The vineyard measured at least one hectare in area and was bounded to the south by a hedge or fence. It was composed of parallel rows oriented 6° N that may have been trained over and along high, inclined wooden frames. Vine stocks were renewed by layering, over several generations of plants. This vineyard attests to the spreading of vineyards from the mid-first century AD, as was initially supposed, and it documents some agricultural …