Search results for "OPAL"

Effectiveness of a web-based acceptance and commitment therapy program for adolescent career preparation : A randomized controlled trial

2021

Acceptance and commitment therapy (ACT) programs have rarely been used as tools for promoting adolescents' career preparation. This randomized controlled trial examined the possibility to promote the career preparation of Finnish ninth-grade adolescents (n = 249, 49% females) with a web-based five-week ACT-based online intervention program. Participants were randomly assigned to three conditions, of which two groups received an iACT including support via SMS (iACTface: iACT+two face-to-face sessions; only iACT: iACT with no face-to-face sessions) and the third (control) group received no treatment. The results showed that career-related insecurity decreased as a result of the intervention i…

Career practitioners´ conceptions of ethical practice in social networking

2020

La charte de Pierre de Brixey, évêque de Toul, pour le prieuré de Bainville-aux-Miroirs (1170)

2004

International audience

Functional Opals from Reactive Polymers: Complex Structures, Sensors, and Modified Photoluminescence

2007

This paper describes the synthesis and properties of functional opal structures, so-called colloidal photonic crystals (CPCs), from a variety of reactive polymers. Photoprocessable opals are presented as well as opals with incorporated smart defect layers that can be actively addressed by external stimuli. In addition, opals with functional bio-macromolecular defects have been developed. They present a new class of materials for optical biomonitoring through shifts of the induced photonic defect mode. Strong modification of photoluminescence according to the photonic bandstructure is observed from opals with embedded exclusively luminescent defect layer.

Chemical Approach to Functional Artificial Opals

2007

Artificial opals are self-assembled colloidal crystals, which consist of a cubic dense packing (fcc) of hard (not film-forming) colloids with diameters ranging from 200 to 900 nm. Because of their periodic nanostructure the assemblies are able to reflect light that matches their periodicity, i.e., UV- to IR-radiation depending on the size of the colloids. Thus, they present a subgroup of 'photonic crystals'. While, originally, the chemistry inside the colloids and the resulting opals was of minor significance, nowadays the chemical variation of opals is becoming more and more important for the preparation of functional and patterned opals. The search for functional opals is, therefore, espe…

Dynamic aspects of industrial middleware architectures

2011

From digitalization to cybernization : Delivering value with cybernized services

2019

This reflection note, based on the lead author’s keynote presentation at the Information Systems Research Seminar in Scandinavia/Scandinavian Conference on Information Systems 2019, makes an argument for the need to study the transformation from digital services to cybernized services offered by service providers to their customers. We first discuss the digitalization of services. Then, we argue that the emergence of cyber-physical systems enables a new kind of services that apply; e.g.; the internet of things, analytics of sensor-based big data, and artificial intelligence for value creation. In other words, the cybernization of services. We illustrate two particular approaches for underst…

Online Expression, Personal Cybersecurity Costs, and the Specter of Cybercrime

2020

The internet is used increasingly as a platform both for free expression and e-commerce. The internet has unique security and privacy risks. Such risks include the threat of criminal cyberattacks, including hacking and doxing. Internet users have a variety of attitudes towards the security and privacy risks involved with using the internet and distinct concerns and behaviors with regard to expressing themselves online. In order to mitigate the security and privacy risks of the internet, some internet users spend valuable time thinking about and configuring the security settings of their devices. They may also have different attitudes towards personal spending of money for cybersecurity prod…

Self-Sovereign Identity Ecosystems : Benefits and Challenges

2021

Verifiable credentials, coupled with decentralized ledger technologies, have been potential providers of trustworthy digital identity for individuals, organizations, and other entities, and thus, potential enablers of trustful digital interactions. The rapid development of this technology—called self-sovereign identity (SSI)—and the ecosystems built around it have been fostered even more by the societal needs stemming from the current pandemic crisis, when governments, non-profit organizations, businesses, and individuals are working together on different aspects of SSI to enable mainstream adoption. In this study, we build on rich qualitative data gathered from SSI practitioners to give a …

On Attacking Future 5G Networks with Adversarial Examples : Survey

2022

The introduction of 5G technology along with the exponential growth in connected devices is expected to cause a challenge for the efficient and reliable network resource allocation. Network providers are now required to dynamically create and deploy multiple services which function under various requirements in different vertical sectors while operating on top of the same physical infrastructure. The recent progress in artificial intelligence and machine learning is theorized to be a potential answer to the arising resource allocation challenges. It is therefore expected that future generation mobile networks will heavily depend on its artificial intelligence components which may result in …