Search results for "LED"

The troubled identities in the relationship between peers and the role of the viewer

2012

The focus of paper considers the bullying as a state of "oppression" caused by the difficult definition of identity by many teenagers. Today, the violence between peers is characterized as one of the most effective strategies for the construction of atypical identity or "troubled identity", in specific relational contexts (frames)among peer.

COVID-19 Remote Work : Body Stress, Self-Efficacy, Teamwork, and Perceived Productivity of Knowledge Workers

2021

Due to COVID-19, companies were forced to adopt new work processes, and reduce modern work environments such as collaboration spaces. Professionals from many fields were forced to work remotely, almost overnight. Little is known about the impact of such non-volunteer remote work on productivity, stress, and other key aspects of work performance. To further our understanding of the impacts of this situation and remote work in general, we conducted an exploratory study by studying 28 knowledge work professionals (researchers, software developers, interior designers, service designers, and development consultants) from the viewpoint of perceived productivity and aspects affecting it in this un…

Personal use of technology at work : a literature review and a theoretical model for understanding how it affects employee job performance

2021

Employee personal use of technology at work (PUTW)—defined as employees’ activities using organisational or personal IT resources for non-work-related purposes while at work—is increasingly common in organisations. Our review of existing PUTW studies (n = 137) suggests that previous studies widely discussed PUTW outcomes, antecedents, and policies. The literature review also indicates that previous studies have proposed opposing viewpoints regarding the effect of PUTW on employee job performance, but few studies offered empirical evidence. Consequently, the conditions under which PUTW can increase or decrease employee job performance have not been discussed. We develop a theoretical model (…

Essays on regional development and labor mobility in a knowledge-based economy

2011

Geneza ruchu ziomkowskiego w Niemczech Zachodnich (1947–1949) a źródła rewizjonizmu zachodnioniemieckiego

2018

The homeland association movement in Germany is an important element of the social and political landscape of that country. The importance of this movement and its influence upon the political system of Germany underwent evolution. The greatest importance – in social aspect, but also in political aspect – characterised the initial twenty-year period of the existence of the Federal Republic of Germany, i.e. the years 1949–1969. Numerous connections that the movement leaders had with political parties, along with the participation in holding power (the representatives of the movement sat in federal governments as well), stood as evidence that the expelled and their organisations had tangible …

Capturing situational interest in the past : the salience of children’s experiences in open-air museums 

2019

Open-air museums are immersive learning environments disseminating ideas about the lifestyle and material culture of pre-modern times. Considering their significance and prevalence in Northern and Eastern Europe, little is known about how contemporary children perceive these cultural heritage spaces. This study scrutinizes how primary school pupils from Sweden and Belarus encountered visits to Skansen (Sweden) and the Belarusian State Museum of Folk Architecture and Rural Lifestyle (Belarus) and expressed experiences about their visits in drawings and in follow-up interpretations. To record the patterns in children’s experiences, a mixed method was employed, including participant observatio…

Influence of Viscosity on Mass Transfer Performance of Unbaffled Stirred Vessels

2013

Unbaffled stirred tanks are seldom employed in the process industry as they are considered poorer mixers than baffled vessels. However they may be expected to provide significant advantages in a wide range of applications (e.g. crystallization, food and pharmaceutical processes, etc) where the presence of baffles is often undesirable. Moreover, in plants or animal cell cultivation bioreactors, where cell damage is often caused by bursting bubbles at the air –medium interface (Barret et al., 2010), they can provide sufficient mass transfer through the free surface vortex, so bubble formation and subsequent bursting inside the reactor can be conveniently avoided (Scargiali et al., 2012). In t…

SOLID-LIQUID SUSPENSIONS IN UNBAFFLED TANKS

2009

Unbaffled stirred tanks are seldom employed in the process industry as they are considered poorer mixers than baffled tanks. However, they might provide significant advantages in a wide range of applications like crystallization processes as well as for food and pharmaceutical industries, where the presence of baffles is often undesirable. In the present work solid-liquid suspension in an unbaffled stirred tank was investigated. A novel experimental method (steady cone radius method) was devised to ease the evaluation of the minimum impeller speed for complete particle suspension (Njs). Experiments encompassed a quite wide range of particle sizes, densities and solids concentration. The Njs…

Ordered fuzzy rules generation based on incremental dataset

2021

This paper proposes a novel approach for building transparent knowledge-based systems by generating interpretable fuzzy rules that allow for present dependences between quantitative variables by accounting for uncertainty and the dynamics of their values. In the approach, IF-THEN rules are used to show the conditional relationship between the ordered fuzzy numbers, which contain additional information about the tendencies of variables' value changes. This paper elaborates an approach of mining ordered fuzzy rules from numerical data included in an incremental database. This approach develops the ability to record uncertainty and its change in the context of rapidly changing data. In additio…

Maxillary necrosis by mucormycosis : a case report and literature review

2007

The maxilla rarely undergoes necrosis due to its rich vascularity. Maxillary necrosis can occur due to bacterial infections such as osteomyelitis, viral infections such as herpes zoster or fungal infections such as mucormycosis, aspergillosis etc. Mucormycosis is an opportunistic fulminant fungal infection, which mainly infects immunocompromised patients. The infection begins in the nose and paranasal sinuses due to inhalation of fungal spores. The infection can spread to orbital and intracranial structures either by direct invasion or through the blood vessels. The fungus invades the arteries leading to thrombosis that subsequently causes necrosis of hard and soft tissues. We report a case…