Search results for " Sam"
showing 10 items of 1096 documents
Bayesian forecasting with the Holt–Winters model
2010
Exponential smoothing methods are widely used as forecasting techniques in inventory systems and business planning, where reliable prediction intervals are also required for a large number of series. This paper describes a Bayesian forecasting approach based on the Holt–Winters model, which allows obtaining accurate prediction intervals. We show how to build them incorporating the uncertainty due to the smoothing unknowns using a linear heteroscedastic model. That linear formulation simplifies obtaining the posterior distribution on the unknowns; a random sample from such posterior, which is not analytical, is provided using an acceptance sampling procedure and a Monte Carlo approach gives …
Evaluating Dance Consumption through the Experiential Value Approach
2018
Purpose – The experiential paradigm has been confirmed as a valuable means to explore and understand people’s consumption of cultural services, thus drawing an increasing interest in the marketing and consumer behavior literature. In this context, consumers’ behavioral decisions are considered not as merely functional but also strongly influenced by emotional dimensions and intrinsic aspects. As consumption of arts is strongly associated with feelings, the experiential approach is a valuable lens for exploring and understanding individuals who consume cultural services. This paper therefore adopts the experiential approach to assess dance as a consumption experience, which is meant to be in…
Girls’ portrayals in fast fashion advertisements
2022
This study analyses the visual construction of girls and notionssurrounding young femininities articulated by 15 contemporaryadvertisements of Nordic fast fashion companies, available on theirpublic Facebook pages in Finland. A visual discourse analysis identifiessome blatantly stereotypical and a few complex visual constructions ofgirls as heterosexual, caring, innocent, sexy posers, active self-presentersand self-surveyors, carefree and environmental activists. Theimplications of our findings, particularly in shaping societal notionssurrounding girls, are discussed. The study contributes primarily to theresearch field of visual commercial representation of girls by unpackinghow their comp…
Export Barriers and Strategic Grouping
2007
Abstract The purpose of our work is to investigate the export strategy of international business by explicitly comparing exporting firms with non-exporting ones. This task has been undertaken by having recourse to a very large sample with more than 55,000 registered Spanish enterprises from all commercial sectors. Using this sample, we try to demonstrate that exporters and non-exporters belong to different strategic groups, with different profit levels. The existence of three kinds of barriers (managerial, organisational and external) constrains migration of non-exporting enterprises to the exporting group. However, the conclusions herein presented point at some ways of avoiding these barri…
The value drivers of high-tech consumer products
2011
Abstract This study investigates the influence of the customer-value hierarchy model and social network on the perceived economic value of high-tech consumer products. This quantitative empirical study was conducted among Finnish households in early 2008 using the form interview method. The non-probability quota sampling method was applied. The data consisted of 453 completed questionnaires. Hypothesis testing was conducted by linear multiple regression analysis. Goal-, consequence-, and attribute-level value perceptions were found to have a positive effect on the perceived economic value of high-tech consumer products. Attribute-level value had the strongest effect on the formation of perc…
Characterization of the Altered Zone Around a Fracture in Palmottu Natural Analogue
1996
AbstractA drill core sample penetrating at a natural fracture has been analysed by helium gas techniques and by α-autoradiography. Porosity and diffusivity profiles away from the fracture have been determined and compared with structural profiles. Model calculations are used to determine the effects of sample size on the measured porosities and diffusivities.
Using the simplified falling head technique to detect temporal changes in field-saturated hydraulic conductivity at the surface of a sandy loam soil
2007
Abstract Determining temporal changes in field-saturated hydraulic conductivity ( K fs ) is important for understanding and modeling hydrological phenomena at the field scale. Little is known about temporal variability of K fs values measured at permanent sampling points. In this investigation, the simplified falling head (SFH) technique was used for an approximately 2-year period to determine temporal changes in K fs at 11 permanent sampling points established at the surface of a sandy loam soil. Additional K fs measurements were obtained by the single-ring pressure infiltrometer (PI) technique to also compare the SFH and PI techniques. The lowest mean values of K fs , M ( K fs ), were det…
Femtosecond digital lensless holographic microscopy to image biological samples
2013
The use of femtosecond laser radiation in digital lensless holographic microscopy (DLHM) to image biological samples is presented. A mode-locked Ti:Sa laser that emits ultrashort pulses of 12 fs intensity FWHM, with 800 nm mean wavelength, at 75 MHz repetition rate is used as a light source. For comparison purposes, the light from a light-emitting diode is also used. A section of the head of a drosophila melanogaster fly is studied with both light sources. The experimental results show very different effects of the pinhole size on the spatial resolution with DLHM. Unaware phenomena on the field of the DLHM are analyzed.
Depletion induced isotropic-isotropic phase separation in suspensions of rod-like colloids
2007
When non-adsorbing polymers are added to an isotropic suspension of rod-like colloids, the colloids effectively attract each other via depletion forces. We performed Monte Carlo simulations to study the phase diagram of such rod-polymer mixture. The colloidal rods were modeled as hard spherocylinders; the polymers were described as spheres of the same diameter as the rods. The polymers may overlap with no energy cost, while the overlap of polymers and rods is forbidden. Large amounts of depletant cause phase separation of the mixture. We estimated the phase boundaries of isotropic-isotropic coexistence both in the bulk and in confinement. To determine the phase boundaries we applied the gra…