Etiology of intracranial berry aneurysms

1989 ◽  
Vol 70 (6) ◽  
pp. 823-831 ◽  
Author(s):  
William E. Stehbens
Keyword(s):  
Scientific Data ◽  
Supporting Evidence ◽  
Collateral Flow ◽  
Connective Tissue Disorders ◽  
Connective Tissues ◽  
Aneurysmal Dilatation ◽  
Causal Factors ◽  
Content Type ◽  
Hemodynamic Stress ◽  
Feeding Vessels

✓ The congenital theory of the etiology of intracranial berry aneurysms has been widely accepted for manyyears. Review of the supporting evidence indicates that it is not based on sound scientific data but on unscientific and unsubstantiated allegations. There is no evidence of a congenital, developmental, or inherited weakness of the vessel wall. The most plausible explanation is that the aneurysms are acquired degenerative lesions — the effect of hemodynamic stress. The mural atrophy leading to aneurysmal dilatation is an acquired lesion which can be produced experimentally by hemodynamics alone. Hypertension and connective tissue disorders associated with acquired loss of tensile strength of the connective tissues are not essential: they appear to be aggravating rather than causal factors. Occlusion of one or more feeding vessels may enhance the possibility of aneurysm formation at large arterial forks subjected to the augmented hemodynamic stress associated with collateral flow.

A systematic review of principal time use research

2021 ◽  
Vol 59 (2) ◽  
pp. 215-232
Author(s):  
Craig Hochbein ◽  
Abby Mahone ◽  
Sara Vanderbeck
Keyword(s):  
Systematic Review ◽  
Time Use ◽  
Time Management ◽  
Supporting Evidence ◽  
Management Skills ◽  
Preparation Programs ◽  
Content Type ◽  
Principal Preparation Programs ◽  
History Of ◽  
Positive Correlations

PurposeTo advance the study of principal time use (PTU), the purpose of this study is to report findings from a systematic review of PTU research. In addition to identifying common findings, this study also examined the supporting evidence and methodologies of PTU studies. From this dual approach, this study specified the evidence that supports claims about PTU, as well as identified areas requiring future examination.Design/methodology/approachA systematic reference review process considered 5,746 potential PTU manuscripts. The inclusion criteria identified 55 studies published between 1920 and 2015. This review synthesized data pertaining to the methodologies and findings of PTU research.FindingsFindings from studies conducted across decades indicated that principals worked extensive hours. Moreover, the workdays of principals consisted of brief and unrelated activities, most often focused on noninstructional tasks. Contrary to common hypotheses, studies indicated that PTU dedicated to administrative tasks exhibited positive correlations with educational outcomes. However, claims about PTU have been derived from samples overrepresented by large urban school districts and limited periods of observation.Practical implicationsFuture studies should implement diversified sampling strategies and extended observation periods. For principal preparation programs, the results indicated an opportunity for increased instruction on time management skills.Originality/valueThis systematic review identifies the overlooked history of the research and specifies the evidence that supports common claims about PTU, which provides empirically derived guidance for future PTU studies.

Giant arteriovenous fistula of the vein of Galen in early infancy treated successfully with surgery

1980 ◽  
Vol 53 (5) ◽  
pp. 703-706 ◽  
Author(s):  
Jose Andres Alvarez-Garijo ◽  
Manuel Vila Mengual ◽  
Dario Taboada Gomila ◽  
Adela Alonso Martin
Keyword(s):  
Heart Failure ◽  
Arteriovenous Fistula ◽  
Vein Of Galen ◽  
Cerebral Damage ◽  
Left Hemiparesis ◽  
Content Type ◽  
Feeding Vessels ◽  
Unusual Lesion ◽  
Persistent Hydrocephalus ◽  
Fine Print

✓ A giant arteriovenous fistula in a newborn infant was treated by surgical occlusion of the feeding vessels at 20 days of life. Congestive heart failure responded favorably to operative treatment. Because of persistent hydrocephalus, a shunt was inserted at 2 months of age. At 9 months of age, the child remained without signs of cardiac failure. Cerebral damage was manifested by a mild left hemiparesis. Successful surgical treatment of this unusual lesion in a neonate is exceptional.

An exploratory study of health scientists’ data reuse behaviors

2017 ◽  
Vol 69 (4) ◽  
pp. 389-407 ◽  
Author(s):  
Soohyung Joo ◽  
Sujin Kim ◽  
Youngseek Kim
Keyword(s):  
Organizational Support ◽  
Exploratory Study ◽  
Scientific Data ◽  
Perceived Usefulness ◽  
Data Reuse ◽  
Health Science ◽  
Equation Modeling ◽  
Survey Method ◽  
Research Model ◽  
Content Type

Purpose The purpose of this paper is to examine how health scientists’ attitudinal, social, and resource factors affect their data reuse behaviors. Design/methodology/approach A survey method was utilized to investigate to what extent attitudinal, social, and resource factors influence health scientists’ data reuse behaviors. The health scientists’ data reuse research model was validated by using partial least squares (PLS) based structural equation modeling technique with a total of 161 health scientists in the USA. Findings The analysis results showed that health scientists’ data reuse intentions are driven by attitude toward data reuse, community norm of data reuse, disciplinary research climate, and organizational support factors. This research also found that both perceived usefulness of data reuse and perceived concern involved in data reuse have significant influences on health scientists’ attitude toward data reuse. Research limitations/implications This research evaluated its newly proposed research model based on the theory of planned behavior using a sample from the community of scientists’ scholar database. This research showed an overall picture of how attitudinal, social, and resource factors influence health scientists’ data reuse behaviors. This research is limited due to its sample size and low response rate, so this study is considered as an exploratory study rather than a confirmatory study. Practical implications This research suggested for health science research communities, academic institutions, and libraries that diverse strategies need to be utilized to promote health scientists’ data reuse behaviors. Originality/value This research is one of initial studies in scientific data reuse which provided a holistic map about health scientists’ data sharing behaviors. The findings of this study provide the groundwork for strategies to facilitate data reuse practice in health science areas.

The impact of FDI on human capital development in SACU countries

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Winfried Henok ◽  
Teresia Kaulihowa
Keyword(s):  
Human Capital ◽  
Secondary Level ◽  
Policy Implications ◽  
Supporting Evidence ◽  
Human Capital Development ◽  
Member States ◽  
Content Type ◽  
Level Of Education ◽  
Capital Development ◽  
The Impact

PurposeThis paper aims to examine how FDI trickle down to human capital development in SACU member states.Design/methodology/approachA longitudinal research design and feasible general least squares was used over the periods 1990 and 2018.FindingsThere is supporting evidence that FDI enhances human capital when primary school enrolment rate is used. However, the reverse holds for the secondary level of education. It can be argued that although FDI exhibits a positive effect on primary education, optimal spillovers to human capital development has not been realized. An indication that certain level of human capital may be required to ensure the optimal benefit of FDI or the types of current FDI does not enhance FDI-led-human capital hypothesis.Practical implicationsThe negative effect of FDI toward secondary level of education could be an indication of a weak absorptive capacity. SACU's current dominance of FDI activities toward extractive industries could limit potential benefit of FDI due to capacity constraints. Practical policy implications indicate that SACU member states need to ensure that it attracts FDI toward smart investment that enhances human capital development.Social implicationsThere is need to a gear FDI firms toward corporate social responsibilities that will stimulate secondary education.Originality/valueThe novelty of this paper is twofold. First, it focuses on SACU countries where majority of the people are trapped with poverty and inequality issues. Second, SACU member states have used greenfield FDI as a policy instrument to enhance human capital. However, human capital link remains weak. This creates a need to search for smart FDIs that are committed toward community transformation through human capital development.

Does cloud computing improve team performance and employees' creativity?

Kybernetes ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jing Zou ◽  
Cheng Jian
Keyword(s):  
Cloud Computing ◽  
Team Performance ◽  
Supporting Evidence ◽  
Cloud Infrastructure ◽  
Employee Creativity ◽  
Content Type ◽  
Cloud Management ◽  
Cloud Application ◽  
The Impact ◽  
Cloud Resources

Purpose The present investigation goals to empirically test the role of expert cloud on team performance and employee creativity. Here, the expert cloud comprises cloud application, cloud management, cloud infrastructure and cloud resources. The present study aims to identify important and key criteria and examine the relationships among them. In other words, the purpose of this study to find out the impact and relationship between cloud application, cloud management, cloud infrastructure and cloud resources and team performance and employee creativity. Design/methodology/approach Today, human societies’ rapid growth and the environmental changes that surround us every day are clearly visible. They highly affect our activities. In today’s highly complex organizations, people alone cannot handle all the issues that have arisen. As organizational managers are faced with diverse cultures in the governance of organizations, the need to use work teams with different abilities and specializations to achieve the goals of organizations leads managers to use teamwork and focus on employee creativity. On the other hand, the expert cloud makes it possible for human societies like universities, firms, industries, institutes, businesses and colleges to pool and share their human resources’ skills, knowledge and experiences to meet the competitive era’s demands. Therefore, the current investigation examines the impact of expert cloud on team performance and employee creativity. The research information is collected using an online questionnaire. The data collected is analyzed using AMOS and SMART PLS software. Findings All of the formulated hypotheses are supported. The results have shown that cloud application, cloud management, cloud infrastructure and cloud resources positively and significantly affect team performance and employee creativity. Practical implications Managers must be conscious of the vital role that the professional cloud plays in team performance and the innovation of workers. This paper would also make executives more conscious of the powerful tools in the field of cloud computing. Firms can use the outcomes of this paper investigation to improve team performance and employee creativity. Originality/value It is considered one of the initial efforts to demonstrate the impacts of expert cloud on team performance and employee creativity. This study’s value relies on that practitioners and academics may have supporting evidence on the role played by novel technology such as an expert cloud.

Making more research count: a blockchain enabled one-stop shop for immutable behavioral research

foresight ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Christian Hugo Hoffmann
Keyword(s):  
Institutional Economics ◽  
New Technologies ◽  
Behavioral Science ◽  
Data Integrity ◽  
Original Data ◽  
Scientific Data ◽  
Data Set ◽  
Content Type ◽  
Blockchain Technology ◽  
The Right

Purpose The purpose of this paper is to offer a panoramic view at the credibility issues that exist within social sciences research. Design/methodology/approach The central argument of this paper is that a joint effort between blockchain and other technologies such as artificial intelligence (AI) and deep learning and how they can prevent scientific data manipulation or data forgery as a way to make science more decentralized and anti-fragile, without losing data integrity or reputation as a trade-off. The authors address it by proposing an online research platform for use in social and behavioral science that guarantees data integrity through a combination of modern institutional economics and blockchain technology. Findings The benefits are mainly twofold: On the one hand, social science scholars get paired with the right target audience for their studies. On the other hand, a snapshot of the gathered data at the time of creation is taken so that researchers can prove that they used the original data set to peers in the future while maintaining full control of their data. Originality/value The proposed combination of behavioral economics with new technologies such as blockchain and AI is novel and translated into a cutting-edge tool to be implemented.

scholarly journals The conception of organisational fraud: the need for rejuvenation of fraud theory

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ach Maulidi ◽  
Jake Ansell
Keyword(s):  
Design Methodology ◽  
Theoretical Discussion ◽  
Violent Crimes ◽  
Causal Factors ◽  
Content Type ◽  
Fraud Theory ◽  
Antecedents And Consequences ◽  
Crime Causation ◽  
Insight Into

Purpose This paper aims to challenge some of the underlying concepts about causation of fraud and in doing so enriches knowledge and insight into the management of fraud. Design/methodology/approach This study is a part of fieldwork carried out in Indonesia. Findings Organisational fraud is an exceptional type of crime. Hence, the underlying antecedents and consequences of fraud in organisation are distinct from other crimes, especially violent crimes. The underlying logic in criminological and sociological theories and literature cannot fully explain the causal factors of fraud in the organisation. This leads to a theoretical discussion about the reconstruction of the fraud theory. Implications and suggestions for further studies are discussed in this study. Originality/value This study provides a new understanding of fraud and its antecedents and consequences. In doing so, it examines the long-standing debate in criminology and sociology about the theories concerning crime causation, as these areas provide the underlying logic of fraud theory.

scholarly journals The allure of celebrities: unpacking their polysemic consumer appeal

2019 ◽  
Vol 53 (10) ◽  
pp. 2025-2053
Author(s):  
Markus Wohlfeil ◽  
Anthony Patterson ◽  
Stephen J. Gould
Keyword(s):  
Design Methodology ◽  
Supporting Evidence ◽  
Human Beings ◽  
Total Period ◽  
Content Type ◽  
The Public ◽  
The Social ◽  
Social Link ◽  
The Individual ◽  
Practical Implications

Purpose This paper aims to explain a celebrity’s deep resonance with consumers by unpacking the individual constituents of a celebrity’s polysemic appeal. While celebrities are traditionally theorised as unidimensional semiotic receptacles of cultural meaning, the authors conceptualise them here instead as human beings/performers with a multi-constitutional, polysemic consumer appeal. Design/methodology/approach Supporting evidence is drawn from autoethnographic data collected over a total period of 25 months and structured through a hermeneutic analysis. Findings In rehumanising the celebrity, the study finds that each celebrity offers the individual consumer a unique and very personal parasocial appeal as the performer, the private person behind the public performer, the tangible manifestation of either through products and the social link to other consumers. The stronger these constituents, individually or symbiotically, appeal to the consumer’s personal desires, the more s/he feels emotionally attached to this particular celebrity. Research limitations/implications Although using autoethnography means that the breadth of collected data is limited, the depth of insight this approach garners sufficiently unpacks the polysemic appeal of celebrities to consumers. Practical implications The findings encourage talent agents, publicists and marketing managers to reconsider underlying assumptions in their talent management and/or celebrity endorsement practices. Originality/value While prior research on celebrity appeal has tended to enshrine celebrities in a “dehumanised” structuralist semiosis, which erases the very idea of individualised consumer meanings, this paper reveals the multi-constitutional polysemy of any particular celebrity’s personal appeal as a performer and human being to any particular consumer.

Acute cauda equina syndrome from a ruptured aneurysm in the sacral canal

1992 ◽  
Vol 77 (6) ◽  
pp. 945-948 ◽  
Author(s):  
Richard H. Schmidt ◽  
M. Sean Grady ◽  
Wendy Cohen ◽  
Sanford Wright ◽  
H. Richard Winn
Keyword(s):  
Cauda Equina Syndrome ◽  
Cauda Equina ◽  
Signs And Symptoms ◽  
Vascular Supply ◽  
Ruptured Aneurysm ◽  
Collateral Flow ◽  
Content Type ◽  
Internal Iliac ◽  
The Right ◽  
Sacral Canal

✓ The case is presented of a young woman with acute cauda equina syndrome from a ruptured aneurysm in the sacral canal. The lesion was associated with pathological enlargement of the lateral sacral arteries bilaterally, which presumably occurred to provide cross-pelvic collateral flow in response to the diversion of the right internal iliac artery for renal transplantation. The patient presented with signs and symptoms of spontaneous spinal epidural hemorrhage. The radiographic features of this lesion are described. In addition to angiography and partial embolization of the vascular supply, contrast-enhanced high-resolution computerized tomography was essential in the diagnosis and treatment of this unique aneurysm.

Using student activity trends to inform purchasing: a layered model for collection management

2016 ◽  
Vol 35 (2) ◽  
pp. 54-56
Author(s):  
Katherine F. Mason
Keyword(s):  
Research Question ◽  
The Body ◽  
Collection Management ◽  
Supporting Evidence ◽  
Collection Development ◽  
Content Type ◽  
Student Activity ◽  
Layered Model ◽  
Library Use ◽  
Theoretical Paper

Purpose The purpose of this paper is to explore the development of a layered model for describing student activity that librarians can use to inform collection management decisions. It proposes using student activity in the classroom and the library, physically and virtually, to increase understanding of student curricular and research needs. The model can be used as a tool to facilitate conversations and can be adapted for use in large and small projects. Design/methodology/approach The paper used a theoretical approach using Mathematics Department as an example, with supporting evidence from existing studies and research. As a theoretical paper, data are discussed in the framework of what information you might use. Findings Experimentation suggests that the framework of student activity provides a meaningful assessment of collection contents that can be used to inform collection development activities. Implementation of the model in response to a specific research question may build evidence towards the assertion that patterns of academic activity and library use should be used to improve collection offerings. Research limitations/implications Further research is required to determine which criteria are most appropriate for inclusion in specific collection development activities and which questions are best suited for modeling. Practical implications The paper includes implications for developing student “personas” that can be used in collection building and beyond. Social implications The framework introduced can be used by libraries of any size or type to develop a layered model of student, or more generally user, activity. Originality/value This paper adds a flexible, responsive process to the body of collection assessment methods.

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