Search results for "rake"

Iron-based metal-organic framework: Synthesis, structure and current technologies for water reclamation with deep insight into framework integrity.

2021

Water is a supreme requirement for the existence of life, the contamination from the point and non-point sources are creating a great threat to the water ecosystem. Advance tools and techniques are required to restore the water quality and metal-organic framework (MOFs) with a tunable porous structure, striking physical and chemical properties are an excellent candidate for it. Fe-based MOFs, which developed rapidly in recent years, are foreseen as most promising to overcome the disadvantages of traditional water depolluting practices. Fe-MOFs with low toxicity and preferable stability possess excellent performance potential for almost all water remedying techniques in contrast to other MOF…

A legacy of contrasting spatial genetic structure on either side of the Atlantic-Mediterranean transition zone in a marine protist

2012

The mechanisms that underpin the varied spatial genetic structures exhibited by free-living marine microorganisms remain controversial, with most studies emphasizing a high dispersal capability that should redistribute genetic diversity in contrast to most macroorganisms whose populations often retain a genetic signature of demographic response to historic climate fluctuations. We quantified the European phylogeographic structure of the marine flagellate Oxyrrhis marina and found a marked difference in spatial genetic structure, population demography, and genetic diversity between the northwest Atlantic and Mediterranean Sea that reflects the persistent separation of these regions as well …

Rural livelihood diversification: a solution for poverty in the post‐Soviet rural Baltic states?

2019

This article analyses rural livelihood diversification through a longitudinal follow‐up survey, that targets former collective farm workers in Estonia, Latvia and Lithuania. It argues, that between 1995 and 2010 the former collective farm workers employed three distinct livelihood diversification strategies in order to create their living. A wage‐based livelihood diversification strategy, which does not include any agricultural practices, was more common among the better‐off households. A farm‐based livelihood diversification strategy, which does not rely on salaries, was more often employed by the poor. A mixed strategy, that combines both wage income and farm activities, was used by both …

Synthesis of self-assembled mesoporous 3D In2O3 hierarchical micro flowers composed of nanosheets and their electrochemical properties

2018

This report describes the methodology for the fabrication of mesoporous In2O3 microflowers by hydrothermal and calcination procedures in which In(OH)3/In2S3 acts as an intermediate. Both In2O3 and its precursor were analyzed with scanning electron microscopy, energy dispersive X-ray spectrophotometry, transmission electron microscopy and powder X-ray diffraction. BET surface area, pore size and pore volume analyses were also carried out. Electron microscopy images clearly evidence the self-assembly of 2D nanosheets into the micro flower structure. The mechanism of self-assembly and calcination is reported. Electrochemical properties of the synthesized In2O3 micro flowers were studied.

Ammattilaisten käsityksiä mentoroinnista työpaikalla

2010

Tool Wear and Damage

2008

This chapter provides comprehensive knowledge regarding tool wear mechanisms and characterizes their physical fundamentals. Adhesion, abrasion, diffusion and oxidation are selected as predominant mechanisms controlling tool wear, depending on the mechanical and thermal conditions at the rake and flank faces. The analytical models describing the wear rate and volumetric material loss for different wear mechanisms are provided. The tool wear indicators related to crater, flank and notch wear specified in ISO 3685 are presented for both flat-faced and grooved tools. Tool life is defined and corresponding models, including the influence of cutting speed, feed and the depth of cut, are derived. …

Methanol fuel processor and PEM fuel cell modeling for mobile application

2010

International audience; The use of hydrocarbon fed fuel cell systems including a fuel processor can be an entry market for this emerging technology avoiding the problem of hydrogen infrastructure. This article presents a 1 kW low temperature PEM fuel cell system with fuel processor, the system is fueled by a mixture of methanol and water that is converted into hydrogen rich gas using a steam reformer. A complete system model including a fluidic fuel processor model containing evaporation, steam reformer, hydrogen filter, combustion, as well as a multi-domain fuel cell model is introduced. Experiments are performed with an IDATECH FCS1200™ fuel cell system. The results of modeling and experi…

The Fourth Industrial Revolution and Changes to Working Life : What Supports Adult Employees in Adapting to New Technology at Work?

2020

AbstractThis chapter aims to increase current understanding of adults’ individual learning pathways and needs when adapting to new technology. We review adults’ overall technology skills and depict, through chosen examples, how adults have adapted to technological change in their working lives. We present prior research on the challenges that the Fourth Industrial Revolution poses to adults’ further education, and based on the Programme for the International Assessment of Adult Competencies (PIAAC), we review adults’ problem-solving skills in technology-rich environments. Overall, the findings emphasize the importance of design-based education and the need for companies to flexibly address …

Playing horror : narrative and genre in Valve's Left 4 Dead Series

2013

The place of story and narrative in digital games has been a hotly contested topic within the field of Game Studies during the past two decades. Beyond the question of whether games can or should be used for telling stories, research interest has focused on the nature of game narratives and their distinct qualities in comparison to other expressive media, like literature and film. The aim of this thesis is to contribute to this debate by examining the elements involved in storytelling not in digital games overall, but in one particular series, namely Valve Software‘s Left 4 Dead and Left 4 Dead 2. The use of this in-depth case study allows an examination of how various different elements co…

Reversal of Gender Disparity in Journalism Education- Study of Ghana Institute of Journalism

2017

Journalism has practically become a feminine profession across the world. To understand the root of the flow of women into the Journalism profession it is pertinent to begin at the university education level. Gallagher’s 1992 worldwide survey of female students in 83 journalism institutions reveals a significant increase in number of female students. Djerf-Pierre (2007) and others argue along Bourdieu’s conception of education as a form of social capital which empowers, enables and enhances women’s competitiveness in a pre-dominantly androgynous social arena. The study analyses 16 years of enrolment data of the Academic Affairs Unit of the Ghana Institute of Journalism (GIJ), a leading Jour…