scholarly journals Air delay propagation patterns in Europe from 2015 to 2018: an information processing perspective

Author(s):  
Luisina Pastorino ◽  
Massimiliano Zanin

Abstract The characterisation of delay propagation is one of the major topics of research in air transport management, due to its negative effects on the cost-efficiency, safety and environmental impact of this transportation mode. While most research works have naturally framed it as a transportation process, the successful application of network theory in neuroscience suggests a complementary approach, based on describing delay propagation as a form of information processing. This allows reconstructing propagation patterns from the dynamics of the individual elements, i.e. from the evolution observed at individual airports, without the need of additional a priori information. We here apply this framework to the analysis of delay propagation in the European airspace between 2015 and 2018, describe the evolution of the observed structure, and identify the role of individual airports in it. We further use this analysis to illustrate the limitations and challenges associated to this approach, and to sketch a roadmap of future research in this evolving topic.

Author(s):  
Katherine H. Rogers

When forming impressions of an other’s personality, people often rely on information not directly related to the individual at hand. One source of information that can influence people’s impressions of others is the personality of the average person (i.e., normative profile). This relationship between the normative profile and an impression is called normative accuracy or normativity. In this chapter, you will learn about the average personality, why it is important, the relationship to social desirability and what it means to have a normative impression, as well as correlates and moderators of normativity. More broadly, you will learn about current research and views regarding the normative profile and normative impressions as well as concrete steps for incorporating this approach into your future research on interpersonal perception.


Author(s):  
Kalin Z. Salinas ◽  
Amanda Venta

The current study proposed to determine whether adolescent emotion regulation is predictive of the amount and type of crime committed by adolescent juvenile offenders. Despite evidence in the literature linking emotion regulation to behaviour problems and aggression across the lifespan, there is no prior longitudinal research examining the predictive role of emotion regulation on adolescent recidivism, nor data regarding how emotion regulation relates to the occurrence of specific types of crimes. Our primary hypothesis was that poor emotion regulation would positively and significantly predict re-offending among adolescents. We tested our hypothesis within a binary logistic framework utilizing the Pathways to Desistance longitudinal data. Exploratory bivariate analyses were conducted regarding emotion regulation and type of crime in the service of future hypothesis generation. Though the findings did not indicate a statistically significant relation between emotion regulation and reoffending, exploratory findings suggest that some types of crime may be more linked to emotion regulation than others. In sum, the present study aimed to examine a hypothesized relation between emotion regulation and juvenile delinquency by identifying how the individual factor of dysregulated emotion regulation may have played a role. This study’s findings did not provide evidence that emotion regulation was a significant predictor of recidivism over time but did suggest that emotion regulation is related to participation in certain types of crime one year later. Directions for future research that build upon the current study were described. Indeed, identifying emotion regulation as a predictor of adolescent crime has the potential to enhance current crime prevention efforts and clinical treatments for juvenile offenders; this is based on the large amount of treatment literature, which documents that emotion regulation is malleable through treatment and prevention programming.


2016 ◽  
Vol 23 (3) ◽  
pp. 600 ◽  
Author(s):  
Uba Backonja ◽  
Nai-Ching Chi ◽  
Yong Choi ◽  
Amanda K Hall ◽  
Thai Le ◽  
...  

Background: Health technologies have the potential to support the growing number of older adults who are aging in place. Many tools include visualizations (data visualizations, visualizations of physical representations). However, the role of visualizations in supporting aging in place remains largely unexplored.Objective: To synthesize and identify gaps in the literature evaluating visualizations (data visualizations and visualizations of physical representations), for informatics tools to support healthy aging.Methods: We conducted a search in CINAHL, Embase, Engineering Village, PsycINFO, PubMed, and Web of Science using a priori defined terms for publications in English describing community-based studies evaluating visualizations used by adults aged ≥65 years.Results: Six out of the identified 251 publications were eligible. Most studies were user studies and varied methodological quality. Three visualizations of virtual representations supported performing at-home exercises. Participants found visual representations either (a) helpful, motivational, and supported their understanding of their health behaviors or (b) not an improvement over alternatives. Three data visualizations supported understanding of one’s health. Participants were able to interpret data visualizations that used precise data and encodings that were more concrete better than those that did not provide precision or were abstract. Participants found data visualizations helpful in understanding their overall health and granular data.Conclusions: Studies we identified used visualizations to promote engagement in exercises or understandings of one’s health. Future research could overcome methodological limitations of studies we identified to develop visualizations that older adults could use with ease and accuracy to support their health behaviors and decision-making.


Toxins ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 133 ◽  
Author(s):  
Annika Jagels ◽  
Viktoria Lindemann ◽  
Sebastian Ulrich ◽  
Christoph Gottschalk ◽  
Benedikt Cramer ◽  
...  

The genus Stachybotrys produces a broad diversity of secondary metabolites, including macrocyclic trichothecenes, atranones, and phenylspirodrimanes. Although the class of the phenylspirodrimanes is the major one and consists of a multitude of metabolites bearing various structural modifications, few investigations have been carried out. Thus, the presented study deals with the quantitative determination of several secondary metabolites produced by distinct Stachybotrys species for comparison of their metabolite profiles. For that purpose, 15 of the primarily produced secondary metabolites were isolated from fungal cultures and structurally characterized in order to be used as analytical standards for the development of an LC-MS/MS multimethod. The developed method was applied to the analysis of micro-scale extracts from 5 different Stachybotrys strains, which were cultured on different media. In that process, spontaneous dialdehyde/lactone isomerization was observed for some of the isolated secondary metabolites, and novel stachybotrychromenes were quantitatively investigated for the first time. The metabolite profiles of Stachybotrys species are considerably influenced by time of growth and substrate availability, as well as the individual biosynthetic potential of the respective species. Regarding the reported adverse effects associated with Stachybotrys growth in building environments, combinatory effects of the investigated secondary metabolites should be addressed and the role of the phenylspirodrimanes re-evaluated in future research.


PEDIATRICS ◽  
1962 ◽  
Vol 30 (1) ◽  
pp. 157-158
Author(s):  
Carl C. Fischer

REGARDLESS of how we, as individual physicians, may feel about the role of the federal government in the individual practice of medicine, the time has long since passed when we can afford the luxury of ignoring it. In past years the influence of the government on medicine has been mostly in general areas and perhaps least of all in that of pediatrics; but under the present administration there has been a decided change. For this reason it seems necessary to me to call to the attention of all Fellows of the Academy the particular items in President Kennedy's message of February 26, 1962, which relate specifically to the practice of Pediatrics. These may be considered to be three in number: The first of these dealt with the subject of immunization. On this topic President Kennedy said: I am asking the American people to join in a nationwide vaccination program to stamp out these four diseases (whooping cough, diphtheria, tetanus, and poliomyelitis) encouraging all communities to immunize both children and adults, keep them immunized and plan for the routine immunization of children yet to be born. To assist the states and local communities in this effort over the next 3 years, I am proposing legislation authorizing a program of federal assistance. This program would cover the full cost of vaccines for all children under 5 years of age. It would also assist in meeting the cost of organizing the vaccination drives begun during this period, and the cost of extra personnel needed for certain special tasks.


Author(s):  
Michael F. Drummond

A recent paper by Grutters et al makes the case for early health economic modeling in the development of health technologies. A number of examples of the value of early modeling are given, with analyses being performed at different stages in the development of several non-drug health technologies. This commentary acknowledges the contribution of the paper by Grutters et al and argues for an iterative and integrated approach to early modeling, assessing the cost-effectiveness of the technology, the value of future research and the interaction with the manufacturer’s pricing and revenue expectations.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Daniel Tidbury ◽  
Steven F. Cahan ◽  
Li Chen

Purpose Board faultlines, which reflect intrinsic divisions of board members into relatively homogeneous subgroups, are associated with poor firm performance. This paper aims to extend the existing board faultline research by examining how acquisition deal size moderates the negative implications of board faultlines. Design/methodology/approach This paper uses a sample of acquisitions and a quantitative research approach to conduct statistical analysis. Findings Using a sample of acquisitions announced between 2007 and 2016, this paper finds evidence suggesting that strong faultlines are associated with poorer acquisition outcomes in the long-term, but not in the short term. Further, this paper finds that the effect of faultline strength on long-term acquisition outcomes is weaker for larger acquisition deals than smaller acquisition deals. The findings are consistent with deal size moderating the relation between faultlines and acquisition outcomes. Research limitations/implications This paper addresses possible endogeneity through firm fixed effects and instrumental variable analysis. Although this paper provides evidence on the moderating role of deal size in the context of faultlines, future research could examine the role of additional moderators, such as pro-diversity, trust, board leadership and board and task characteristics. Practical implications The findings suggest that boards need to be aware of situations where the negative effects of faultlines are more likely to come to the fore. For example, faultlines are more likely to play a role in more routine, obscure monitoring than for high-profile strategic decisions. Originality/value The study is multidisciplinary as it draws on the management, organizational behaviour and psychology and finance literature. It contributes to the developing literature on faultlines in several important ways. First, this paper supports their view that faultlines have adverse effects on board performance by showing that faultlines negatively impact discrete strategic investment decisions. Second, this paper provides evidence that deals size moderates the faultline-acquisition performance relation, indicating that the role of faultlines is contextual. Third, this paper finds evidence that suggests investors do not factor in board faultlines when responding to acquisition announcements.


2019 ◽  
Vol 50 (3) ◽  
pp. 348-380 ◽  
Author(s):  
Julia Eisenberg ◽  
Corinne Post ◽  
Nancy DiTomaso

Organizations increasingly rely on virtual teams to access geographically dispersed expertise. Yet, team dispersion introduces challenges to team communication that may negatively influence team performance. Using a sample of 53 innovation teams representing a variety of geographic dispersion configurations from completely collocated to highly dispersed, we examined the moderating role of transformational leadership on the relationship between team dispersion, team communication, and team performance. Our findings suggest that while transformational leadership is effective in reducing the negative effects of dispersion in collocated teams or ones with low levels of geographic dispersion, it is less effective helping improve the performance of highly dispersed teams. This effect may be due to a transformational leader’s difficulty in facilitating team communication in highly dispersed teams, where his or her influence might actually have counterproductive effects. We discuss the implications of our findings for theory, future research, and practice.


1983 ◽  
Vol 7 (1) ◽  
pp. 21-42
Author(s):  
Harald Haarmann

SUMMARY Criteria for Ethnic Identity Despite numerous publications on theoretical and methodological issues regarding ethnic identity (ethnicity), many methodological problems relative to this topic remain insufficiently clarified. This article deals particularly with the problems involved in establishing and evaluating criteria of ethnic identity. The author assigns the complex of problems regarding ethnic identity significant status within a theory of the ecology of language. Specific points covered in methodological issues involving the formation of concepts and application of terminology involve: 1. problems of the weighting of distinctive features; 2. problems in the mutual boundary-marking between ethnic groups (i.e., problems of ethnic borders); 3. problems in the changeability of ethnic identity; 4. problems in the correlation of language and ethnicity; 5. problems of the polarity of subjective and objective features of ethnicity; 6. problems of multiple identities and the role of ethnic identity; 7. problems in the historical dimension of ethnic identity; 8. problems in the linking of groups within language communities of the same national identity. In international sociological and sociolinguistic research, unanimity of opinion exists only on the fact that ethnic identity cannot be characterized by a single feature but rather by a series of individual features (the accumulation of features). The priorities to be attached to the individual features are in large measure disputed. The author proceeds from the assumption that ethnic identities in real life are formed through a stronger or weaker dominance of individual features; they should be characterized accordingly. An unacceptable a priori evaluation or weighting of features is thus avoided. In the specific context of a long-term research program on the smaller language communities and ethnic languages of Europe, the author particularly examines the role of language in ethnicity. Contrary to most previous contributions to discussions of this problem area, the author distinguishes between the general linguistic affiliation as a characteristic of ethnic identity on the one hand (cf. the relationship in point 4) and the criterion of language-oriented group formations (cf. relationship in point 8). The problem area of the principle of language community is illustrated using the example of the Transcarpathian Gypsies in the Ukraine. RESUMO Kriterioj de la etna idento Malgraŭ multaj ĝisnunaj eldonajoj pri la etna idento (etneco), multaj metodaj pro-blemoj rilataj al tiu temaro restas nesufice klarigitaj. La jena artikolo aparte traktas la problemaron de la starigo kaj elvalorigo de kriterioj de la etna idento. La autoro al-jugas al la problemaro pri la etna idento gravan rangon interne de teorio pri la lingva ekologio. Apartaj punktoj, traktitaj en metodaraj demandoj, rilataj al la formado de konceptoj kaj la apliko de terminaro, estas: 1. problemaro pri la elvalorigo de karakteraj trajtoj; 2. problemaro de la reciproka limigo inter etnaj grupoj (t.e. problemoj pri etnaj limoj); 3. problemaro pri la šanĝebleco de la etna idento; 4. problemaro pri la rilato inter lingvo kaj etneco; 5. problemaro pri la polusigo de subjektivaj kaj objektivaj trajtoj de etneco; 6. problemaro de pluroblaj identoj kaj la rolo de etna idento; 7. problemaro ce la historia dimensio de la etna idento; 8. problemaro de la formiĝo de grupoj interne de lingvaj komunumoj de la sama nacia idento. En la internacia sociologia kaj socilingvistika esplorado, unuanimeco de opinio ekzistas nur pri la fakto, ke ne eblas karakterizi la etnan identon nur per unusola trajto, sed, male, per aro da opaj trajtoj (la kuniĝo de trajtoj). Oni grandparte disputas pri la prioritato, kiun oni aljuĝu al la opaj trajtoj. La autoro progresas ek de la asumo, ke la etnaj identoj en la vera vivo estas formitaj per, jen pli forta, jen pli malforta, rego de opaj trajtoj; oni karakterizu ilin lau tio. Tiel, oni evitas neakceptindan aprioran elvalorigon au elpezigon de trajtoj. En la aparta kunteksto de longdaura esplorprogramo pri la pli malgrandaj lingvaj komunumoj kaj etnaj lingvoj de Europo, la autoro aparte pristudas la rolon de la lingvo ce la etneco. Kontraue al la plejmultaj ĝisnunaj kontribuoj al diskutoj pri tiu problemaro, la autoro distingas inter la ĝenerala lingva aparteno kiel trajto de la etna idento unuflanke (komparu la rilton ce punkto 4) kaj la kriterion de la formigo de grupoj surbaze de lingvo (komparu la rilaton ce punkto 8). La problemaro de la prin-cipo de la lingva komunumo estas ilustrita per la ekzemplo de la transkarpataj ciganoj en Ukrajnio.


2018 ◽  
Vol 31 (2) ◽  
pp. 334-351 ◽  
Author(s):  
Ronald Busse ◽  
Ufuk Doganer

Purpose Fuelled by the latest scandals at Siemens, VW or Walmart, there is a lively debate on the role of compliance and ethics programmes. Unlike large corporations, small and medium-sized enterprises (SMEs) arguably tend to underestimate their significance and lag behind. Hence, the purpose of this paper is to shed light on the process of introducing compliance codes and its effects on employee acceptance and performance. Design/methodology/approach In line with the qualitative methodology, the authors conducted 12 in-depth interviews with German SME employees which the authors evaluated with the qualitative content analysis. Findings As for the major contribution, results indicate the emergence of a lack of understanding, anger, anxiety and operational performance losses – both at the individual and the corporate level – especially when employees feel uninvolved in the initial introduction stadium. Originality/value Practicing managers may benefit from the recommendation to facilitate staff involvement at earlier stages. As for theory advancement, the authors draw on Kotter’s (2007) long surviving “Eight Steps Change Management Model” and find significant support for shifting the spotlight of attention towards the first four phases. The authors discuss the original value of the research, admit limitations and illuminate some promising future research trajectories.


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