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El modelo Netflix (2015-2020). Estrategias del servicio de streaming aplicables a las tiendas FNACLópez Belda, Luis Antonio 27 September 2023 (has links)
Esta investigación, que pretende continuar y actualizar la realizada en mi TFM de COMINCREA (Master oficial de comunicación e industrias creativas de la Universidad de Alicante) sobre la viabilidad de la sección de cine de las tiendas FNAC con la digitalización de contenidos, analiza el modelo de negocio de Netflix en España y sus estrategias empresariales para la consolidación de su producto digital. El inesperado éxito del mismo, superando con creces las pesimistas expectativas de los estudios académicos previos a su llegada, ha intensificado las profundas transformaciones en la producción, distribución y consumo de los productos audiovisuales de entretenimiento, poniendo en serio peligro el futuro del formato físico y las tiendas dedicadas a su venta. Dichas estrategias emergen, en realidad, como una optimización de las utilizadas en el pasado por las propias tiendas, por lo que se indaga en la viabilidad de que dichas tiendas físicas y mixtas (las que ofertan también venta online de dicho producto físico) puedan, a su vez, implementar (de manera mejorada y adaptada) dichas estrategias con el objetivo de seguir siendo un negocio viable.
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Tailed-based Analsys : An analysis of tailed properties of different distributions / Svansbaserad analysBruno, ELias, Lidberg, Erik January 2024 (has links)
Social media and user engagement are bigger than ever. Users are presented with various types of content curated by algorithms, which partially dictate what is shown to them. These algorithms lack transparency and clarity for the user. In this thesis we have developed a toolset to tail fit data of user engagement to show what behaviours this data actually shows. We want to see the differences between categories of content and show how user engagement in social media behaves. From our study we have found that there are differences between how users engage with different leanings within political content andcontents of differing credibility. We have also found that more narrow metrics in choosingdata can present different results and behaviours. From this we can determine that choice of data is crucial when working with tails. Future work is imperative to keep creating understanding for these social media platforms and how users engage with different types of content. To keep up with the constantly changing environment of social media new tools and methods will needed to create understanding for our most used platforms for public interaction.
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Identification of functional enhancers at open chromatin regions involved in sex specificity and xenobiotic metabolism using in vivo STARR-seq in mouse liversChang, Ting-Ya 20 September 2024 (has links)
Enhancers regulate gene expression through epigenetic mechanisms influenced by internal and external stimuli. In mouse liver, growth hormone and environmental chemical exposures activate enhancers regulating gene expression in part through changes in chromatin accessibility. Identifying functional enhancers in the complex environment of mouse liver is challenging. This thesis presents HDI-STARR-seq, a massively parallel STARR-seq reporter assay that combines hydrodynamic injection (HDI)-driven plasmid delivery to mouse liver cells in vivo with expression from the liver-specific Albumin promoter to assay functional changes in enhancer-driven transcription induced by sex-dependent hormonal stimulation and xenobiotic exposure. HDI-STARR-seq employs a minimal albumin promoter, shows minimal innate immune response and apparently facilitates plasmid chromatinization recapitulating endogenous liver chromatin states. The assay is robustly reproducible in a small reporter library (~100 regions) and can be scalable for genome-wide analysis using 25,000-50,000 synthetic DNA fragments or enzyme-released mouse liver genomic fragments. Single nucleus-based 10x Genomics Multiome analysis identified accessible mouse liver chromatin regions genome-wide, their linked target genes in hepatocytes, and their differential accessibility between sexes and following exposure to TCPOBOP, a CAR (Nr1i3) agonist ligand. Using HDI-STARR-seq, functional enhancer activity was determined for 1,789 accessible chromatin regions across biological conditions, identifying many sex-biased, GH-regulated enhancers undergoing chromatin changes. The regulated enhancers were associated with enrichment for H3K4me1 and H3K27ac histone marks, showed regulated activities that matched activating histone marks and contained Hnf4a and other enriched motifs in male-biased, GH-repressed enhancer sets. Further, the impact of TCPOBOP exposure for 1 day or 2 weeks on HDI-STARR-seq activity was evaluated in mice of both sexes at 1,834 accessible chromatin regions. Induced H3K27ac and static H3K4me1 were enriched at TCPOBOP-responsive enhancers, as were DR4 motifs bound by CAR/RXR heterodimers. Motifs bound by Tcf, involved in cell proliferation, were enriched in HDI-STARR-seq active enhancers only after 2-week TCPOBOP exposure, indicating activation of a late responding signaling pathway. This research gives novel insights into the relationship between functional enhancer activity in mouse liver and hormonal and xenobiotic regulated epigenetic landscapes, and establishes the utility of HDI-STARR-seq for discovery of biologically relevant enhancer sequences in vivo. / 2026-09-18T00:00:00Z
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B Cell Antigen Receptor-intrinsic Costimulation of IgG and IgE Isotypes / B Zell Antigen Rezeptor-intrinsische Kostimulation der IgG und IgE IsotypenKönig, Lars 11 April 2012 (has links)
No description available.
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Characterization and construction of max-stable processesStrokorb, Kirstin 02 July 2013 (has links)
No description available.
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Essays on asset allocation strategies for defined contribution plansBasu, Anup K. January 2008 (has links)
Asset allocation is the most influential factor driving investment performance. While researchers have made substantial progress in the field of asset allocation since the introduction of mean-variance framework by Markowitz, there is little agreement about appropriate portfolio choice for multi-period long horizon investors. Nowhere this is more evident than trustees of retirement plans choosing different asset allocation strategies as default investment options for their members. This doctoral dissertation consists of four essays each of which explores either a novel or an unresolved issue in the area of asset allocation for individual retirement plan participants. The goal of the thesis is to provide greater insight into the subject of portfolio choice in retirement plans and advance scholarship in this field. The first study evaluates different constant mix or fixed weight asset allocation strategies and comments on their relative appeal as default investment options. In contrast to past research which deals mostly with theoretical or hypothetical models of asset allocation, we investigate asset allocation strategies that are actually used as default investment options by superannuation funds in Australia. We find that strategies with moderate allocation to stocks are consistently outperformed in terms of upside potential of exceeding the participant’s wealth accumulation target as well as downside risk of falling below that target by very aggressive strategies whose allocation to stocks approach 100%. The risk of extremely adverse wealth outcomes for plan participants does not appear to be very sensitive to asset allocation. Drawing on the evidence of the previous study, the second essay explores possible solutions to the well known problem of gender inequality in retirement investment outcomes. Using non-parametric stochastic simulation, we simulate iv and compare the retirement wealth outcomes for a hypothetical female and male worker under different assumptions about breaks in employment, superannuation contribution rates, and asset allocation strategies. We argue that modest changes in contribution and asset allocation strategy for the female plan participant are necessary to ensure an equitable wealth outcome in retirement. The findings provide strong evidence against gender-neutral default contribution and asset allocation policy currently institutionalized in Australia and other countries. In the third study we examine the efficacy of lifecycle asset allocation models which allocate aggressively to risky asset classes when the employee participants are young and gradually switch to more conservative asset classes as they approach retirement. We show that the conventional lifecycle strategies make a costly mistake by ignoring the change in portfolio size over time as a critical input in the asset allocation decision. Due to this portfolio size effect, which has hitherto remained unexplored in literature, the terminal value of accumulation in retirement account is critically dependent on the asset allocation strategy adopted by the participant in later years relative to early years. The final essay extends the findings of the previous chapter by proposing an alternative approach to lifecycle asset allocation which incorporates performance feedback. We demonstrate that strategies that dynamically alter allocation between growth and conservative asset classes at different points on the investment horizon based on cumulative portfolio performance relative to a set target generally result in superior wealth outcomes compared to those of conventional lifecycle strategies. The dynamic allocation strategy exhibits clear second-degree stochastic dominance over conventional strategies which switch assets in a deterministic manner as well as balanced diversified strategies.
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Pig tail biting in different farrowing and rearing systems with a focus on tail lesions, tail losses and activity monitoringGentz, Maria 09 July 2020 (has links)
No description available.
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Advanced linear methods for T-tail aeroelasticity / Louwrens Hermias van ZylVan Zyl, Louwrens Hermias January 2011 (has links)
Flutter is one of the primary aeroelastic phenomena that must be considered in aircraft design.
Flutter is a self-sustaining structural vibration in which energy is extracted from the air flow and
transferred to the structure. The amplitude of the vibration grows exponentially until structural
failure occurs. Flutter stability requirements often influence the design of an aircraft, making
accurate flutter prediction capabilities an essential part of the design process. Advances in
computational fluid dynamics and computational power make it possible to solve the fluid flow and
structural dynamics simultaneously, providing highly accurate solutions especially in the transonic
flow regime. This procedure is, however, too time-consuming to be used in the design optimisation
process. As a result panel codes, e.g., the doublet lattice method, and modal-based structural
analysis methods are still being used extensively and continually improved.
One application that is lagging in terms of accuracy and simplicity (from the user’s perspective)
is the flutter analysis of T-tails. The flutter analysis of a T-tail usually involves the calculation of
additional aerodynamic loads, apart from the loads calculated by the standard unsteady
aerodynamic codes for conventional empennages. The popular implementations of the doublet
lattice method do not calculate loads due to the in-plane motion (i.e., lateral or longitudinal motion)
of the horizontal stabiliser or the in-plane loads on the stabiliser. In addition, these loads are
dependent on the steady-state load distribution on the stabiliser, which is ignored in the doublet
lattice method.
The objective of the study was to extend the doublet lattice method to calculate the additional
aerodynamic loads that are crucial for T-tail flutter analysis along with the customary unsteady air
loads for conventional configurations. This was achieved by employing the Kutta-Joukowski
theorem in the calculation of unsteady air loads on lifting surface panels. Calculating the additional
unsteady air loads for T-tails within the doublet lattice method significantly reduces the human
effort required for T-tail flutter analysis as well as the opportunities for introducing errors into the
analysis.
During the course of the study it became apparent that it was necessary to consider the quadratic
mode shape components in addition to the linear mode shape components. Otherwise the unsteady
loads due to the rotation (“tilting”) of the steady-state load on the stabiliser, one of the additional
aerodynamic loads that are crucial for T-tail flutter analysis, would give rise to spurious generalised
forces. In order to reduce the additional burden of determining the quadratic mode shape components, methods for calculating quadratic mode shape components using linear finite element
analysis or estimating them from the linear mode shape components were developed.
Wind tunnel tests were performed to validate the proposed computational method. A T-tail
flutter model which incorporated a mechanism for changing the incidence angle of the horizontal
stabiliser, and consequently the steady-state load distribution on the horizontal stabiliser, was used.
The flutter speed of this model as a function of the horizontal stabiliser incidence was determined
experimentally and compared to predictions. Satisfactory correlation was found between predicted
and experimentally determined flutter speeds. / Thesis (M.Ing. (Chemical Engineering))--North-West University, Potchefstroom Campus, 2012
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Novel Analogs of m-Chlorophenylguanidine as 5-HT3 Receptor LigandsAlix, Katie 01 May 2009 (has links)
Serotonin receptors play a variety of functional roles in the body. Some indications and treatment claims for one of the classes of serotonin receptors, the 5-HT3 receptor family, include: anxiety, depression, chemotherapy- and radiation-induced emesis, constipation, irritable bowel syndrome, pain, drug addiction, and satiety control. A 5-HT3 receptor partial agonist, MD-354, served as a lead compound in the development of new 5-HT3 receptor ligands. Using halogenated analogs the study investigated their effect on binding to the 5-HT3 receptor. Conformationally-constrained analogs (quinazolines) were shown to be a novel class of 5-HT3 receptor antagonists. The log P values were determined for several analogs, and indicated that these ligands should be able to penetrate the blood-brain barrier. A homology model of the 5-HT3 receptor was built and the docking modes were assessed for these two series. Quinazolines were investigated for antidepressant properties using the mouse tail suspension test, and were shown to possess antidepressant-like activity.
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EXPLORING THE CONCEPT OF HUMAN OCT3 INHIBITORS AS A NOVEL CLASS OF ANTIDEPRESSANTSIyer, Kavita A 01 January 2016 (has links)
The Dukat laboratory developed 2-amino-6-chloro-3,4-dihydroquinazoline (A6CDQ) as a 5-HT3 receptor ligand. A6CDQ and one of its positional isomers, the 7-chloro analog A7CDQ, produced antidepressant-like effects in the mouse tail suspension test (TST). We investigated and systematically ruled out a solely 5-HT3 receptor or hSERT mediated mechanism of antidepressant-like effect for both A6CDQ and A7CDQ.
The role of organic cation transporter 3 (OCT3) as an alternative mechanism in the regulation of neurotransmitters including serotonin (5-HT) and the therapeutic potential of targeting hOCT3 to achieve antidepressant effects has been established. By virtue of possessing protonatable nitrogen atoms, 2-aminodihyroquinazolines could potentially exhibit activity at OCT3. A major goal of our present study was to explore the non-serotonergic mechanism of antidepressant-like effects and to study the as yet unexplored structure-activity-relationships (SARs) at OCT3. We examined the role of i) the chloro group, ii) the methylene bridge and iii) electronic/lipophilic effects at the 6-position.
We developed the first 3-D homology models of both the human and mouse orthologs of OCT3, conducted docking studies and HINT analysis, and identified critical amino acid residues interacting with 2-aminodihydroquinazoline analogs at hOCT3 and mOCT3. Retention of antidepressant-like activity in the mouse and potential locomotor stimulant effects for TST-active doses were thoroughly investigated.
We have successfully investigated initial SAR of 2-aminodihydroquinazolines at hOCT3 and generated the first 3-D homology models of hOCT3 and mOCT3. Highly potent and selective compounds could potentially be developed as radioligands to probe the binding site of OCT3 and as a mechanistically novel class of antidepressants.
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