scholarly journals Gas Turbine Compressor Fouling and Washing in Power and Aerospace Propulsion

2017 ◽  
Vol 139 (12) ◽  
Author(s):  
Uyioghosa Igie
Keyword(s):  
Gas Turbine ◽  
Current Knowledge ◽  
Academic Research ◽  
Subject Area ◽  
Current State ◽  
Washing Efficiency ◽  
State Of Research ◽  
The Individual ◽  
Gas Turbine Compressor ◽  
High Degree

This paper presents a well-researched subject area within academia, with a high degree of application in the industry. Compressor fouling effect is one of the commonest degradations associated with gas turbine operations. The aim of this review is to broadly communicate some of the current knowledge while identifying some gaps in understanding, in an effort to present some industry/operational interest for academic research. Likewise, highlight some studies from academia that present the current state of research, with their corresponding methods (experimental, numerical, actual operations, and analytical methods). The merits and limitations of the individual method and their approaches are discussed, thereby providing industry practitioners with a view to appreciating academic research outputs. The review shows opportunities for improving compressor washing effectiveness through computational fluid dynamics (CFD). This is presented in the form of addressing the factors influencing compressor washing efficiency. Pertinent questions from academic research and operational experiences are posed, on the basis of this review.

scholarly journals Student Feedback on Teaching in Schools: Current State of Research and Future Perspectives

2021 ◽  
pp. 259-271
Author(s):  
Wolfram Rollett ◽  
Hannah Bijlsma ◽  
Sebastian Röhl
Keyword(s):  
Student Perceptions ◽  
Teaching Quality ◽  
Student Feedback ◽  
Comprehensive Overview ◽  
Feedback Information ◽  
Current State ◽  
Feedback Culture ◽  
State Of Research ◽  
The Individual ◽  
High Level

AbstractThe aim of this volume was to give a comprehensive overview of the current state of the research on student perceptions of and student feedback on teaching. This chapter provides a resume of the important theoretical considerations and empirical evidence the authors contributed to this volume. First, evidence concerning the validity of student perceptions of teaching quality is discussed, highlighting the quality of the questionnaires used and accompanying materials provided by their authors. In the next step, empirical findings are summarized on student and teacher characteristics that can influence important processes within the feedback cycle. Subsequently, it is emphasized that the effectiveness of student feedback on teaching is significantly related to the nature of the individual school’s feedback culture. Furthermore, it is argued that the efficacy of student feedback depends on whether teachers are provided with a high level of support, when making use of the feedback information to improve their teaching practices. As the literature review impressively documents‚ teachers, teaching, and ultimately students can benefit substantially from student feedback on teaching in schools.

The State of Mishnah Studies

2011 ◽  
Author(s):  
AMRAM TROPPER
Keyword(s):  
The State ◽  
Jewish Law ◽  
Major Work ◽  
Rabbinic Judaism ◽  
Current State ◽  
State Of Research ◽  
The Individual

This chapter examines the current state of research into mishnah, the first major work of rabbinic Judaism. It explains that the mishnah is primarily an edited anthology of brief and often elliptical pronouncements on matters of Jewish law and practice, frequently providing conflicting views on the individual matters discussed. It discusses the six sedarim of the mishnah and mentions that the mishnah frequently digresses from its main topics at every level of the organisational hierarchy.

scholarly journals Discriminated by an algorithm: a systematic review of discrimination and fairness by algorithmic decision-making in the context of HR recruitment and HR development

2020 ◽  
Vol 13 (3) ◽  
pp. 795-848
Author(s):  
Alina Köchling ◽  
Marius Claus Wehner
Keyword(s):  
Systematic Review ◽  
Decision Making ◽  
Current Knowledge ◽  
Future Research ◽  
Journal Articles ◽  
Research Directions ◽  
Current State ◽  
Management Context ◽  
Future Research Directions ◽  
State Of Research

AbstractAlgorithmic decision-making is becoming increasingly common as a new source of advice in HR recruitment and HR development. While firms implement algorithmic decision-making to save costs as well as increase efficiency and objectivity, algorithmic decision-making might also lead to the unfair treatment of certain groups of people, implicit discrimination, and perceived unfairness. Current knowledge about the threats of unfairness and (implicit) discrimination by algorithmic decision-making is mostly unexplored in the human resource management context. Our goal is to clarify the current state of research related to HR recruitment and HR development, identify research gaps, and provide crucial future research directions. Based on a systematic review of 36 journal articles from 2014 to 2020, we present some applications of algorithmic decision-making and evaluate the possible pitfalls in these two essential HR functions. In doing this, we inform researchers and practitioners, offer important theoretical and practical implications, and suggest fruitful avenues for future research.

Land Gas Turbine Exhaust Noise

1977 ◽  
Vol 99 (4) ◽  
pp. 526-532
Author(s):  
R. A. Kantola
Keyword(s):  
Gas Turbine ◽  
Exhaust System ◽  
Separated Flow ◽  
Scale Model ◽  
Exhaust Hood ◽  
Noise Sources ◽  
Exhaust Noise ◽  
Gas Turbine Exhaust ◽  
The Individual ◽  
High Degree

An acoustic test program on a 1/7-scale model of the exhaust configuration for a General Electric MS 5000 gas turbine has been carried out. The tests were designed to isolate the noise contributions of the individual exhaust system components and to identify the additional noise due to combinations of two or more components. This model of the MS 5000 system was found to have three principal noise sources. At a high degree of turbine exit swirl all three sources appear with the most dominant due to an interaction between aft bearing support strut wakes and downstream exhaust hood turning vanes. At zero swirl the isolated turning vane noise and an exhaust hood plenum resonance are the remaining principal noise sources. A rather unexpected effect was uncovered in the course of this program; a strong reduction in the noise generation of separated flow downstream of struts and vanes was observed when a diffuser was placed immediately behind the strut or vane exit plane. This reduction in noise was much greater than could be attributed to the reduction in velocity caused by the diffuser.

Laser Welding of Titanium and its Alloys for Medical Applications: Current Knowledge and Future Direction

2009 ◽  
Vol 618-619 ◽  
pp. 291-294 ◽  
Author(s):  
Alexander Buddery ◽  
Matthew S. Dargusch ◽  
David H. StJohn ◽  
John Drennan ◽  
Samih Nabulsi
Keyword(s):  
Laser Welding ◽  
Current Knowledge ◽  
Medical Applications ◽  
Current State ◽  
State Of Research ◽  
Future Direction

This paper outlines the current state of research into laser welding of titanium and its alloys for medical applications. The differences that exist between the medical and other industries are described and a direction for advancing research in this field is proposed.

scholarly journals Kilka uwag o narracji biograficznej czeskich strażaków (projekt Społeczeństwo czeskie w okresie tzw. normalizacji i transformacji w świetle oral history)

2013 ◽  
Vol 3 ◽  
pp. 175-185
Author(s):  
Hana V. Bortlová
Keyword(s):  
Oral History ◽  
Current Knowledge ◽  
Historical Analysis ◽  
Historical Research ◽  
Current State ◽  
Before And After ◽  
Methodological Problems ◽  
State Of Research ◽  
And Behavior ◽  
Attitudes And Behavior

Through historical analysis and interpretation of memories of Czech/Czechoslovak firefighters who have been professionally active since 1960s until 1990s (and/or beyond), his paper aims to analyze the ways in which his socio-professional group has been behaving during the last 40–50 years. Given that only very little historical research has been done on members of this group, the paper represents a first pioneer attempt. The research is a continuation of previous research projects conducted by Czech oral historians focused on working class members and on changes of their opinions, attitudes and behavior before and after 1989. The author’s ambition is to contribute to the current knowledge of the nature and specifics of the mentioned „normalization” regime (1969–1989) as well as the „transformation-to-democracy” era (1990s) in Czechoslovakia. In the present paper the author outlines the current state of research (20 conducted interviews with 10 firefighters as to the end of 2012), comments on some methodological problems associated with oral-historical research of this group and offers her interpretations of selected topics.

scholarly journals PRINCE STANISŁAW PONIATOWSKI: EXPERT ON AND COLLECTOR OF ANCIENT AND ITALIAN ART

Muzealnictwo ◽  
2020 ◽  
Vol 61 ◽  
pp. 80-89
Author(s):  
Agnieszka Bender
Keyword(s):  
Collective Memory ◽  
Academic Research ◽  
Personal History ◽  
Current State ◽  
Biographical Dictionary ◽  
History Of Art ◽  
Complete Study ◽  
Long Time ◽  
History Of ◽  
State Of Research

The current state of research into the patronage and collecting activities of Prince Stanisław Poniatowski (1754–1833) in Italy with which he was connected for almost 40 years of his life is outlined. Over the period, the Prince made 3 long trips there which preceded 30 years of living in Italy on a permanent basis, first in Rome, and then in Florence where he was buried. Despite his many accomplishments and extraordinary personal history, the Prince has not taken as prominent a position either in academic research or in the collective memory of Poles as his junior cousin Prince Józef who drowned in the Elster River giving his life for the homeland. Although no monograph has as yet been published on Stanisław Poniatowski, he is not entirely forgotten. However, the major studies dedicated to him were published a relatively long time ago. The most extensive, i.e. the book I Poniatowski a Roma (Firenze 1972), speaking of the history of Prince Stanisław and the Poniatowski family, was written by the Italian writer and columnist Andrea Busiri Vici and has never been translated into Polish. As the current state of research shows, very few Polish art historians have taken any in depth interest in the Prince’s activity. Apart from the mentions scattered in different studies, there are merely four articles dealing with some selected aspects of the Prince’s patronage and collecting activity (by Janina Michałkowa, Elżbieta Budzińska, Tadeusz Jaroszewski, Dominika Wronikowska). Historically the most complete study dedicated to Prince Stanisław is to be found in Jerzy Michalski’s paper from 50 years ago published in the Polish Biographical Dictionary. The to-date Polish and foreign publications in history, history of art and archaeology do not exhaust many issues related to the person, activity, and the collecting passion of Prince Stanisław.

Current knowledge and phytosociological data on the high-altitude vegetation in the Western Carpathians — a review

Biologia ◽  
2009 ◽  
Vol 64 (2) ◽  
Author(s):  
Ivana Šibíková ◽  
Jozef Šibík ◽  
Ivan Jarolímek ◽  
Ján Kliment
Keyword(s):  
High Altitude ◽  
Current Knowledge ◽  
Floristic Composition ◽  
Western Carpathians ◽  
High Mountain ◽  
Current State ◽  
Leading Position ◽  
Vegetation Database ◽  
Mountain Vegetation ◽  
The Individual

AbstractPresented survey summarizes the results of the studies published predominantly after 2000, dealing with the plant communities around and above the timberline in (montane) subalpine to alpine (subnival) belt of the Western Carpathians. All of these communities underwent a critical syntaxonomical and nomenclatorical revision, hence the demonstrated overview of high-mountain vegetation of Western Carpathians (mostly from Slovakia, less from Poland border areas) represent the current state of knowledge. The high-altitude vegetation database, which is the part of Slovak National Vegetation Database, SNVD (http://ibot.sav.sk/cdf/index.html), incorporated 8,160 published relevés on 15 May 2007 (of the total of 30,469 published relevés in the SNVD). Concerning the unpublished relevés, the individual authors have provided more than 18,400 of them to be stored in SNVD; 2,301 of all unpublished relevés could be assigned to high-altitude vegetation. Mountain and alpine vegetation is in SNVD presented by 15 classes; the most frequent class is Mulgedio-Aconitetea. With its quantity and also the quality of relevés, the high-altitude database, as well as the whole SNVD, represents the unique database within Slovakia, which provides information not only about the locality, floristic composition and variability of individual vegetation types, but also about several environmental variables such as inclination, aspect, geology or soil type, characteristic for individual relevés. Together with other Central European databases, SNVD takes up the leading position in Europe.

Collaborating With Larger Partners

2019 ◽  
pp. 460-478
Author(s):  
Christian Lechner ◽  
Birthe Soppe ◽  
Karolina Heggli
Keyword(s):  
Literature Review ◽  
Systematic Literature Review ◽  
Academic Research ◽  
Future Research ◽  
Limited Attention ◽  
Entrepreneurial Firms ◽  
Current State ◽  
State Of Research ◽  
Start Ups ◽  
Timely Topic

Although interfirm collaborations between entrepreneurial firms and established partners have become ubiquitous in organizational and business life, academic research on collaborations between start-ups and large industry leaders has only received limited attention. Such collaborations are also known as “asymmetric” or “unbalanced” relationships. The purpose of this chapter is to provide a systematic literature review of the current state of research on collaborations between entrepreneurial and large firms. In particular, the chapter identifies several benefits and risks involved for entrepreneurial firms and uses the findings of the literature review as a springboard to provide a roadmap for future research on this timely topic.

Latest research on brand relationships: introduction to the special issue

2019 ◽  
Vol 28 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Marc Fetscherin ◽  
Francisco Guzman ◽  
Cleopatra Veloutsou ◽  
Ricardo Roseira Cayolla
Keyword(s):  
Bibliometric Analysis ◽  
Academic Research ◽  
Special Issue ◽  
Brand Relationships ◽  
Content Type ◽  
Brand Relationship ◽  
Current State ◽  
Recent Developments ◽  
State Of Research ◽  
As Relationship

PurposeThis paper aims to outline the role of brands as relationship builders and to offer a better understanding of the recent developments and key literature in the area of consumer–brand relationships.Design/methodology/approachThis paper is an editorial based mainly on a literature review on consumer–brand relationships. It uses the sentiment range and passion intensity to position various brand relationship constructs. This work follows the same bibliometric-analysis approach used by Fetscherin and Heinrich (2014) and looked for publications in the Web of Science on brand relationships, with reference to Fournier’s (1998) seminal work and data collected for the period between January 2010 and November 2018.FindingsFirst, this work presents the key consumer–brand relationship terms and positions the work on brand love, brand like, brand hate, brand dislike and brand indifference. In addition, the bibliometric analysis offers a number of insights into the current state of the academic research in the area of consumer–brand relationships, including a clear indication that the research on consumer–brand relationships is increasing.Originality/valueThis work and the whole special issue together help in the understanding of brands as relationship builders, clearly explaining the continuum from strong positive or negative relationships with brands to no relationship with brands and the current state of research in the area.

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