Plasma-Reactor Wall Interactions: Bromine-Fluorine Chemistry Duality in an Industrial Dry Etch Process

2015 ◽  
Vol 1803 ◽  
Author(s):  
M. Rizquez ◽  
A. Roussy ◽  
B. Bortoloti ◽  
J. Pinaton ◽  
Y. Goasduff
Keyword(s):  
Plasma Reactor ◽  
Industrial Process ◽  
Etching Process ◽  
Reactor Wall ◽  
Silicon Etching ◽  
Fluorine Chemistry ◽  
Starting Point ◽  
Dry Etch ◽  
Over Time ◽  
Wall Interactions

ABSTRACTThe purpose of the present paper is to investigate the composition of the coating formed on the plasma reactor walls after an industrial process which is divided into two steps, where the chemistries used are CF4/CH2F2 followed by HBr/O2. Since Fluorine traces have been detected through the plasma and over the wafer even during the second chemistry, investigations of the Br-F chemistry duality for a new silicon etching process have been performed in order to see the reactions which are taking place inside of the reactor. The understanding of these formations is really important to avoid process instabilities and get better performance of the transistors. The coating on the walls after the process and after the cleaning between wafers has been characterized in order to figure out the level of F traces after each step and to understand the reminiscence of this element over time. This study is the starting point to propose a modification on the Waferless AutoClean (WAC) used nowadays in an industrial process.

Quel corpus pour l’étude du dialecte niçois ?

2021 ◽  
Vol 137 (2) ◽  
pp. 344-361
Author(s):  
Philippe Del Giudice
Keyword(s):  
Middle Ages ◽  
Written Language ◽  
Linguistic Features ◽  
Descriptive Grammar ◽  
Written Production ◽  
Starting Point ◽  
Social Use ◽  
Over Time ◽  
Made In ◽  
Do So

Abstract A new project has just been launched to write a synchronic, descriptive grammar of Niçois, the Occitan dialect of Nice. In this article, I define the corpus of the research. To do so, I first review written production from the Middle Ages to the present. I then analyze the linguistic features of Niçois over time, in order to determine the precise starting point of the current language state. But because of reinforced normativism and the decreasing social use of Niçois among the educated population, written language after WWII became artificial and does not really correspond to recordings made in the field. The corpus will thus be composed of writings from the 1820’s to WWII and recordings from the last few decades.

scholarly journals Impacted teeth: Their place is in the dental arch

2019 ◽  
Vol 24 (6) ◽  
pp. 20-26 ◽  
Author(s):  
Alberto Consolaro ◽  
Mauricio de Almeida Cardoso
Keyword(s):  
Dental Arch ◽  
Impacted Teeth ◽  
Unerupted Tooth ◽  
Starting Point ◽  
Unerupted Teeth ◽  
To Receive ◽  
Over Time

ABSTRACT The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events may be guided and directed, so that teeth may occupy the space prepared to receive them in the dental arch, as showed in the case presented to evidence the following principle to be considered in these cases: “Regardless of the position of an unerupted tooth, it may be biologically directed to its place in the dental arch. The orthodontist should apply a mechanics to guide it and park it at its site.”

Natural History Wet Collections: Observations on PH Readings from the Use of Different Ethanol and Label Types

2019 ◽  
Vol 33 (1) ◽  
pp. 7-17
Author(s):  
Ximo Mengual ◽  
France Gimnich ◽  
Hannah Petersen ◽  
Jonas J. Astrin
Keyword(s):  
Natural History ◽  
Tissue Samples ◽  
Daily Work ◽  
Starting Point ◽  
Good Starting Point ◽  
Research Questions ◽  
Almost All ◽  
Changes Over Time ◽  
Fluid Preservation ◽  
Over Time

Abstract We examined the effects of different types of specimen labels and tags on pH of different concentrations of ethanol typically used for fluid preservation in natural history collections. Labels were immersed in three different concentrations of ethanol, 96% pure undenatured ethanol (EtOH), 96% EtOH denatured with methyl-ethyl ketone (MEK), and 99.8% pure undenatured EtOH, with or without the presence of insect specimens, and the solutions were evaluated after 26 months for changes over time in pH reading. In general, pH readings of all label trials with 96% and 99.8% ethanol increased over time, except for trials of denatured alcohol, which demonstrated lower pH readings in almost all treatments, regardless of label type. Samples that contained labels with ordinary, nonstandardized, not explicitly acid-free printing paper had higher pH readings compared after the trial. Our observations are a good starting point for further experiments to answer research questions related to chemical interactions with labels in ethanol-preserved specimens, including tissue samples for molecular analyses, which can guide collection staff in their daily work.

Earlier identification of seriously ill patients: an implementation case series

2019 ◽  
Vol 10 (4) ◽  
pp. e31-e31 ◽  
Author(s):  
Joshua R Lakin ◽  
Meghna Desai ◽  
Kyle Engelman ◽  
Nina O'Connor ◽  
Winifred G Teuteberg ◽  
...  
Keyword(s):  
Palliative Care ◽  
Patient Selection ◽  
Case Series ◽  
Healthcare Systems ◽  
Ongoing Research ◽  
Starting Point ◽  
Seriously Ill Patients ◽  
Analytical Approaches ◽  
Seriously Ill ◽  
Over Time

ObjectiveTo describe the strategies used by a collection of healthcare systems to apply different methods of identifying seriously ill patients for a targeted palliative care intervention to improve communication around goals and values.MethodsWe present an implementation case series describing the experiences, challenges and best practices in applying patient selection strategies across multiple healthcare systems implementing the Serious Illness Care Program (SICP).ResultsFive sites across the USA and England described their individual experiences implementing patient selection as part of the SICP. They employed a combination of clinician screens (such as the ‘Surprise Question’), disease-specific criteria, existing registries or algorithms as a starting point. Notably, each describes adaptation and evolution of their patient selection methodology over time, with several sites moving towards using more advanced machine learning–based analytical approaches.ConclusionsInvolving clinical and programme staff to choose a simple initial method for patient identification is the ideal starting place for selecting patients for palliative care interventions. However, improving and refining methods over time is important and we need ongoing research into better patient selection methodologies that move beyond mortality prediction and instead focus on identifying seriously ill patients—those with poor quality of life, worsening functional status and medical care that is negatively impacting their families.

Critical viewpoints on the Bologna Process in Europe: Can we do otherwise?

2019 ◽  
Vol 18 (2) ◽  
pp. 135-157 ◽  
Author(s):  
Monne Wihlborg
Keyword(s):  
Higher Education ◽  
Education Policy ◽  
Thematic Analysis ◽  
Higher Education Policy ◽  
Bologna Process ◽  
Critical Reasoning ◽  
Starting Point ◽  
European Higher Education ◽  
The Bologna Process ◽  
Over Time

The starting point for this inductive study is to determine, through a search of studies, what critical viewpoints in terms of research are delivered, based on experiences, observations and evaluation, concerning the Bologna Process over time? The aim is to present a description using a thematic analysis based on data from 38 papers (2004–2016) that reveal the critical reasoning behind the research. The reasoning is critical in the sense that various authors have elaborated on and problematized aspects of the Bologna Process in terms of what to avoid and/or have characterized aspects related to the Bologna Process that are not desirable. Based on the outcome of the thematic analysis, theorists were selected in order to deepen the reasoning and meaning highlighted in three themes. The findings are further discussed in terms of knowledge and curriculum development for the future and the advancement of European higher education policy and beyond on equal terms. The article suggests that there are causes for concern regarding unwanted consequences in the aftermath of the Bologna Process.

Exposing scale hegemonies

2019 ◽  
pp. 35-46
Author(s):  
Natalie Papanastasiou
Keyword(s):  
Education Policy ◽  
Political Discourse ◽  
Discourse Theory ◽  
Politics Of Scale ◽  
Education Governance ◽  
Starting Point ◽  
Scalar Politics ◽  
European Education ◽  
Introductory Discussion ◽  
Over Time

The first aim of this chapter is to present an introductory discussion to the book’s empirical focus on education governance. It demonstrates that education governance is a field that is teeming with politics of scale and therefore constitutes an ideal focus for exploring the book’s overarching conceptual puzzle. The second aim of the chapter is to present a useful entry point for policy scholars seeking to explore possible practices of scalecraft in policy contexts. The discussion outlines the key tenets of a genealogical perspective which draws on political discourse theory and pays particular analytical attention to the ‘dislocatory moments’ of policy. By tracing how European education policy evolved over time, the discussion empirically illustrates how a genealogical perspective is an invaluable lens for exposing the contingency of scale hegemonies and that this serves as an essential starting point for problematising scalar politics.

scholarly journals Plasma chemical silicon etching process*

2016 ◽  
Vol 122 ◽  
pp. 012028
Author(s):  
K V Rudenko ◽  
A V Miakonkih ◽  
A E Rogojin ◽  
S V Bogdanov ◽  
V G Sidorov ◽  
...  
Keyword(s):  
Etching Process ◽  
Silicon Etching ◽  
Plasma Chemical

The genesis of international mass migration

2018 ◽  
Author(s):  
Eric Richards
Keyword(s):  
North America ◽  
Structural Changes ◽  
British Isles ◽  
Scottish Highlands ◽  
Isle Of Man ◽  
Mass Migration ◽  
Large Numbers ◽  
Starting Point ◽  
The Common ◽  
Over Time

Very large numbers of people began to depart the British Isles for the New Worlds after about 1770. This was a pioneering movement, a rehearsal for modern international migration. This book contends that emigration history is not seamless, that it contains large shifts over time and place, and that the modern scale and velocity of mobility have very particular historical roots. The Isle of Man is an ideal starting point in the quest for the engines and mechanisms of emigration, and a particular version of the widespread surge in British emigration in the 1820s. West Sussex was much closer to the centres of the expansionary economy in the new age. North America was the earliest and the greatest theatre of oceanic emigration in which the methods of mass migration were pioneered. Landlocked Shropshire experienced some of the earliest phases of British industrialisation, notably in the Ironbridge/Coalbrookdale district, deep inland on the River Severn. The turmoil in the agrarian and demographic foundations of life reached across the British archipelago. In West Cork and North Tipperary, there was clear evidence of the great structural changes that shook the foundations of these rural societies. The book also discusses the sequences and effects of migration in Wales, Swaledale, Cornwall, Kent, London, and Scottish Highlands. It also deals with Ireland’s place in the more generic context of the origins of migration from the British Isles. The common historical understanding is that the pre-industrial population of the British Isles had been held back by Malthusian checks.

School boards and superintendents doing local curriculum work

2014 ◽  
Vol 28 (7) ◽  
pp. 842-855 ◽  
Author(s):  
Pia Skott
Keyword(s):  
School Boards ◽  
National Policy ◽  
Head Teachers ◽  
Human Relationships ◽  
Content Type ◽  
Governing System ◽  
Starting Point ◽  
Over Time ◽  
Local Work ◽  
Selection Of

Purpose – The paper is about a specific part of the Swedish governing system: the municipality, which has the responsibility of implementing national school goals. The starting point is an identified local governing chain including the chairman of the politically elected school board, the superintendent, principals and head teachers. It is the first link in this chain which is in focus, between chairmen and superintendents. The purpose of this paper is to investigate their role understanding and enactment: what roles do they have, formally and enacted? Is it a clear or blurred line between them? What can be seen as causing conflict or success? Design/methodology/approach – The paper is part of a larger research project focussing on what happens when national policy meets local governing structures. The project as a whole has a mixed method design and includes surveys with superintendents, politicians and principals. It also includes interviews with chairmen of local school boards, superintendents and principals. In this paper the focus is on interviews made with politicians and superintendents in six (of 290) municipalities followed over time (including a political election between the authors visits). The municipalities are spread over the country, with shifting political majorities. Findings – The authors identify that there seem to be a shared formal role understanding in that politicians are responsible for the what-side and superintendents for the how-side of the local work. The roles are, however, enacted in a blurred zone with role intrusion as an active component. What causes a conflict or not is if the two have a shared understanding of how to play the game. This makes the local work sensitive to changes on the positions. Success comes from a relationship built on trust and where there is a mutual understanding of how to work. Research limitations/implications – The study is built on a small selection of municipalities and must be complemented by further ones to be able to generalize the results. What it can say something about is, however, how actors in six different local settings enact the same kinds of assignments and if there are similarities and differences between their role enactment. Originality/value – Although the study is built on a small selection of municipalities it is unique in that it follows interlinked actors over time, making it possible not only to discuss municipality stereotypes but study human relationships over time. This also makes it possible to discuss new aspects of governing chains.

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