Search results for "value"

$PT$-symmetric graphene under a magnetic field

2016

We propose a $PT$-symmetrically deformed version of the graphene tight-binding model under a magnetic field. We analyze the structure of the spectra and the eigenvectors of the Hamiltonians around the $K$ and $K'$ points, both in the $PT$-symmetric and $PT$-broken regions. In particular we show that the presence of the deformation parameter $V$ produces several interesting consequences, including the asymmetry of the zero-energy states of the Hamiltonians and the breakdown of the completeness of the eigenvector sets. We also discuss the biorthogonality of the eigenvectors, which {turns out to be} different in the $PT$-symmetric and $PT$-broken regions.

Enhanced Lipid Peroxidation and Platelet Activation in the Early Phase of Type 1 Diabetes Mellitus

2003

Background— To investigate early events possibly related to the development of diabetic angiopathy, we examined whether 8-iso-prostaglandin F 2α (8-iso-PGF 2α ) formation, a marker of in vivo oxidant stress, is altered in different stages of type 1 diabetes (T1DM) and whether it correlates with the rate of thromboxane (TX) A 2 biosynthesis, a marker of in vivo platelet activation. We also investigated the relationship between inflammatory markers and F 2 -isoprostane formation in this setting. Methods and Results— A cross-sectional study was performed in 23 insulin-treated patients aged <18 years with new-onset T1DM (≤6 weeks, group A), matched for age and gender with 23 patients with s…

Dialog w wychowaniu do wartości w szkole

2021

Problematyka dialogu w pedagogice ma swoje źródła w rozwijającej się w XX wieku filozofii dialogu i filozofii spotkania. Analiza ogólnych znaczeń dialogu wskazuje na jego niezbędność w życiu człowieka. Ujmowanie dialogu w perspektywie pedagogicznej pozwala widzieć jego podmioty we właściwych relacjach, opartych na pełnym poszanowaniu i zrozumieniu. W artykule przedstawiono rolę dialogu w kształtowaniu świata wartości uczniów. Podkreślono istotę współdziałania, które we współczesnym świecie stanowi optymalny model interakcji nauczyciela z uczniami

Klasyczna teoria dramatu i jej wychowawcze implikacje

2009

Using affinity perturbations to detect web traffic anomalies

2013

The initial training phase of machine learning algorithms is usually computationally expensive as it involves the processing of huge matrices. Evolving datasets are challenging from this point of view because changing behavior requires updating the training. We propose a method for updating the training profile efficiently and a sliding window algorithm for online processing of the data in smaller fractions. This assumes the data is modeled by a kernel method that includes spectral decomposition. We demonstrate the algorithm with a web server request log where an actual intrusion attack is known to happen. Updating the kernel dynamically using a sliding window technique, prevents the proble…

Predictors of credibility of online media in the spanish polarized media system

2019

Credibility of online news media is facing important challenges: the levelling effect of the digital environment, the changing habits of consumption, polarization of discourses… This scenario makes it relevant to address what features of news brands and news content shape the credibility of contemporary journalism. This article tests a set of items, including journalistic standards, reputation and citizen participation, in order to build predictors involved in credibility judgments. The authors carried on a quantitative survey (n=416), representative of the Spanish online population. Results identified currency of information, inclusion of analysis and context, citation of sources and inclu…

Direct Measurement of Mammographic X-Ray Spectra with a Digital CdTe Detection System

2012

In this work we present a detection system, based on a CdTe detector and an innovative digital pulse processing (DPP) system, for high-rate X-ray spectroscopy in mammography (1–30 keV). The DPP system performs a height and shape analysis of the detector pulses, sampled and digitized by a 14-bit, 100 MHz ADC. We show the results of the characterization of the detection system both at low and high photon counting rates by using monoenergetic X-ray sources and a nonclinical X-ray tube. The detection system exhibits excellent performance up to 830 kcps with an energy resolution of 4.5% FWHM at 22.1 keV. Direct measurements of clinical molybdenum X-ray spectra were carried out by using a pinhole…

Professionals in value co-creation through digital healthcare services

2018

Digitization is changing the dynamics within the service sector, including healthcare. The customer access to information and new ways of interacting with the customer challenge the traditional service within healthcare featured by information asymmetry and autonomous role of professionals in decision making. Digitization introduces new service concepts and roles of service actors benefiting value cocreation among the service network. Customer actively participates in the digital service process, which sets demand for new approach, behavior and skills of the professional interacting with the customer. The present discussion around value cocreation lacks research from the service provider’s …

Unboxing co-creation of value: Users' hedonic and utilitarian drivers

2019

Value co-creation through involving users in service processes via resource integration is a focal service research interest. However, studies often take a firm-centric or generic approach and overlook value co-creation from the point view of an individual user. We address this gap by adopting a qualitative research approach and laddering interviews (n = 113) to examine users’ hedonic and utilitarian drivers for value co-creation behavior in five service system contexts. We argue that underlying differences exist among all service systems and contribute with a novel approach by depicting the differences in value-based motivations for users to co-create value. As practical implications, our …

Value Co-Creation Opportunities: Managerial Transformation of Digitisation Risks into Success Factors

2018

This chapter examines the challenges and risks managers in the healthcare sector perceive in relation to the development and implementation of digitised services in a healthcare case organisation. Using data collected from managers, focus group interviews and observation method within the case organisation, the authors present an analysis that demonstrates that the risks and success factors that influence the development and implementation of digital healthcare services are related to (1) setting a clear digital strategy and implementation plan, (2) integration of digital services with the overall process and ICT, (3) committed resources and engagement of personnel, and (4) the organisation…