scholarly journals From the Editors: Seven years on the editorial team of the Journal of Airline and Airport Management (JAIRM)

2018 ◽  
Vol 7 (2) ◽  
pp. 123
Author(s):  
Pep Simo

The goal of this editorial is to provide a short review of the seven years in which I have formed part of the editorial team of the JAIRM as editor-in-chief, and to suggest the challenges that, from my point of view, are key to the development of the journal and this area of research.

2021 ◽  
Vol 28 (10) ◽  
Author(s):  
Bharat R. Paghadar ◽  
J. B. Sainani ◽  
Samith K. M. ◽  
Poornima Bhagavath

AbstractThe scientific and technical advances in the field of polymer science has been abundant in recent years. Amongst the various polymeric materials available in market, synthesis of polyolefins has been in the forefront since decades. A major challenge in this domain remains in attaining stereoregular polyolefins especially polypropylene (PP) and significant efforts were carried out by synthesizing various internal donors (ID) aiding the catalysts involved in producing them. This short review gives an overview of i) various generations of Ziegler–Natta (ZN) catalyst systems ii) general classes of ID that has been demonstrated by the researchers over the past decades iii) their influence on PP isotacticity and polymer properties. The coordination modes of different donor classes on supported ZN system and comparative study especially between phthalate and diether ID classes were also addressed here. This review also presents the studies carried out on phthalate catalyst structure analysis, detailed comparison study on phthalate and diether IDs in terms of PP isotacticity, regioselectivity, hydrogen response, and also their cross combination study and competitive behavior. Further a brief description on other structurally varied IDs like malonates, maleates, silyl diol esters, bifunctional donors, multi ether donors demonstrated for isotactic PP were also presented. Studies conducted on compatibility of incorporation of two different classes of IDs on a single supported ZN system for the fundamental understanding of the catalyst behavior; and also on how mixed donor approach enables in tuning the catalyst for polymer properties were also presented. This review also provides an opportunity to the young minds and the basic researchers from academic point of view by and large to create new polymeric materials with useful properties or modify the existing materials for new applications by incorporating new IDs for further improvisation of the stereo regularity in obtaining the polymers. Graphic Abstract


2014 ◽  
Vol 28 (19) ◽  
pp. 1430011 ◽  
Author(s):  
Bernd Lorenz ◽  
Arnold M. Guloy ◽  
Paul C. W. Chu

Superconductivity in a novel class of layered materials, Ti -based pnictide oxides, was recently discovered. These compounds have attracted interest since they combine features of copper oxide and iron pnictide superconductors. Here the transition metal (titanium) forms two-dimensional Ti 2 O layers (anti structure to the CuO 2 planes), capped by pnictogen ions (similar to Fe 2 As 2 layers). The pnictide oxide compounds show a spin or charge density wave phase which coexists with superconductivity in some members of the family. Unlike the cuprates, but similar to iron pnictides, the parent compounds of pnictide oxides are metals with specific nesting properties of the Fermi surface which leads to the density wave instability. The nature of the superconductivity, coexisting with the density wave order, and the possible competition or mutual interaction between both states is one of the central questions of recent studies. This short review summarizes the current knowledge from an experimental as well as theoretical point of view and discusses some of the open questions and possible future developments.


2005 ◽  
Vol 20 (1-2) ◽  
pp. 177-228 ◽  
Author(s):  
Ivan Bernier

The object of this paper is to assess the constitutional position as to economic integration within Canada. Following a short review of'the basic elements of economic integration, it proceeds to analyse the law and practice relating to the free circulation of goods, and the free movement of persons, services and capital in Canada. Since such questions are usually associated with the concept of common market, a brief comparison is made on these various points with the practice of the European Economic Community. As far as concerns the free circulation of goods, the study starts with the usual distinction between tariff and non-tariff barriers. If customs duties have long since disappeared between the provinces, the author finds that charges having an effect equivalent to customs duties are not totally precluded under Canadian constitutional law, and as a matter of fact are occasionally encountered in practice. The paper also shows that if non-tariff barriers to interprovincial trade are theoretically precluded under s. 91(2) of the B.N.A. Act, certain types of obstacles not only appear constitutionally acceptable, but also are largely used by governments in practice, such as preferential purchasing policies, subsidies, public enterprises, etc. In the end, when our constitutional rules pertaining to the free circulation of goods are compared with those in application within the European Economic Community, they appear less stringent, leaving greater room for intervention to the provinces. The situation, as far as concerns the free movement of persons, services and capital is quite different. As the study finds, there are no clearly articulated principles relating to these questions in the Canadian constitution. However, due to the existence of a common nationality and a common currency, the most serious difficulties in this respect have been avoided. From that point of view, Canada has benefited from a clear advantage over the European Economic Community. Yet, regarding the free movement of persons and services, the paper shows that whereas no progress appears to have been made on that score within the last decade in Canada, the E.E.C. is pushing forward with plans calling for the common recognition of diplomas, etc. And regarding the free movement of capital, it appears that if the E.E.C has not progressed much since the first years of the Treaty of Rome, Canada for its part appears at the moment to be heading for a period of greater restriction on the movement of capital within the country. In conclusion, the question is raised whether the material division of jurisdiction between the federal and provincial governments, as opposed to a functional division of jurisdiction as is to be found in the E.E.C, is not responsible for the centripetal kind of federalism that appears more and more in demand in Canada as far as concerns economic matters. Acting unilaterally on the basis of its exclusive powers, the federal government has adopted so-called common policies that appear to have met with a large measure of disapproval from the various provinces. But this is a different problem that requires a separate treatment.


2020 ◽  
pp. 198-218
Author(s):  
Olga Lesicka

The article is an attempt to answer the question regarding the contemporary language contacts and their role in the modern Russian language, in particular Russian economic terminology, from the point of view of their appearance, formation, and functioning. The contribution presents a short review of modern tendencies in research on languages in terms of language contacts as well as the character and tendencies of the development of these contacts in the context of research on economic terms in contemporary Russian language.


2020 ◽  
Vol 35 (02n03) ◽  
pp. 2040041
Author(s):  
J. C. Fabris ◽  
T. R. P. Caramês ◽  
A. Wojnar ◽  
H. E. S. Velten

Viscous properties are attributed to the dark sector of the Universe. They contribute to the accelerated expansion phase of the Universe and can alleviate existing tensions in the [Formula: see text]CDM model at small scales. We provide a short review of recent efforts on this topic. Different viscous models for the dark sector are analysed both from theoretical and observational point of view.


2020 ◽  
Vol 13 (1) ◽  
pp. 253-263
Author(s):  
Valeria Tullio ◽  
Stefania Zerbo ◽  
Antonietta Lanzarone ◽  
Salvatore Procaccianti ◽  
Antonina Argo

Electroconvulsive therapy is a treatment that, since its first administration, has been a major topic for debate within the scientific world. In recent years, the debate has become increasingly focused on the short- and/or long-term efficacy of electroconvulsive therapy, its appropriateness in clinical settings, its mechanism of action, the impact evaluation of transient and/or persistent adverse effects, and the drafting of international guidelines, etc. From the authors’ point of view, these themes are inevitably crossed by three other fundamental issues of significant psychological, relational, ethical, and medico-legal impact. Still, they are less studied than purely biomedical issues in recent times. Therefore, the aim of this article is to focus on the following cross-cutting issues: the therapist-patient relationship, the patient’s perspective, the attitude on electroconvulsive therapy, and informed consent. This short review refers to the international literature on ECT published since 2000. Analyses of the three previously listed topics are, in part, made within the context of Italian medical settings.


Author(s):  
Przemysław Rokitowski ◽  
Marcin Grygierek

Abstract Moisture inside the construction of road pavements is the problem for road engineers all around the world. This issue is mentioned in many European or the US papers and studies, but still it needs to be developed. From the road engineers’ point of view, very important for solving above problems are the studies on the influence of water and moisture inside the construction of road pavement during deflection measurements using Falling Weight Deflectometer (FWD). The paper raises this issue by showing a short review of Polish and foreign literature and presenting the first step of research work at the test site on Voivodeship Road 933 in Poland.


2011 ◽  
Vol 1 (5) ◽  
pp. 39
Author(s):  
Baron W.F. Van Asbeck

Artificial coast protection is required where coasts are subjected to erosion. Where the country is low it will be necessary to build sea-walls where natural protection by dunes is not adequate or is completely lacking. In both cases it may also be necessary to protect the country from further advance of the sea by the construction of groynes and breakwaters where lateral currents cause displacement of granular shore material. From the study of the history of coast lines and the development of their protection it is apparent .that apart from the necessity of construction the governing factors of the constructions are safety and economy, or as the British "Departmental Committee on Coastal Flooding" states in its Terms of Reference, it has "to consider what margin of safety for sea defences would be reasonable and practicable having regard on the one hand to the estimated risks involved and on the other to the cost of protective measures". New methods of approach and execution of technical problems such as improved methods of observations and measurements, the use of laboratory experiments, availability of modern equipment and new materials open a wide scope for more economic construction. On the other hand, however, development in this field has been comparatively slow because the consequences of failures oblige the responsible engineer only to alter the traditional design step by step in accordance with progress made in the scientific analysis of the destructive forces of waves and of the properties of the new building materials. The need for investigation is sometimes accentuated by a disaster such as was recently caused by the storm surge of January/February 1953 when on the East Coast of England the observed height of the water-level reached a record of 6 ft. or more than the predicted height according to the astronomical conditions for a continuous period of 15 hours as against 5 hours for former surges. In Holland a water level of 75 cm« above the highest ever recorded level was reached on some sea-walls, causing overtopping of waves. Reports by the "Delta Commissie" in Holland and the "Waverley Committee" in England as well as Papers read on the North Sea Floods for The Institution of Civil Engineers, London, and the Koninklijk Instituut van Ingenieurs, The Hague, deal with the subject adequately. In dealing with coast defence schemes it should be borne in mind that for low lying countries designs should not only be limited to artificial works for direct protection of beacheis, sea walls and dunes. Consideration should also be given to works for reducing areas liable to flooding by overtopping of or breaches in sea-walls or by damage to dunes. In such instances a "second line defence" can be usefully suggested with cross banks to divide the areas in bays or compartments. If these cross banks carry access roads,connecting the inland centres with the sea defence works, they will certainly facilitate communications before and during storms and operations for restoring conditions after storms. In all these works bitumen can be applied to advantage for the protection of beaches, sea walls, dunes and banks as well as for road construction and maintenance works. The use of bitumen in coastal engineering is, of course, also based on practice and theory gained from other civil engineering fields, such as road construction and the building industry. The properties of bitumen and bituminous compounds have first been gradually developed to their present standards in these fields and this knowledge has facilitated the scientific and practical approach of the application of bitumen in sea defence works. In this paper the problem is only described from a practical point of view. After dealing with various aspects of the design of coastal works pertaining to the use of bitumen, a short review is given of the most important types, methods of application and properties of bituminous constructions and finally a number of representative examples of each of the types of application is given.


2011 ◽  
Vol 56 (1) ◽  
Author(s):  
Andreas Merz

AbstractThe following paper aims at highlighting intercultural misunderstandings that can occur due to different semantic values of emblems, a gesture type generally defined as having an accepted verbal translation in a certain culture or community. To illustrate such problems, the semantic meanings of two emblems in Colombia and Germany are described. Misunderstandings caused by the use of these emblems are then explained from a communicative point of view, using Austin's speech-act theory. Additionally, the article offers a short review on the history of emblem research.


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