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RISS 인기검색어
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- 저자 : Joana Reis (검색결과 3 건)
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The impact of industry characteristics on firms’ export intensity
Joana Reis,Rosa Forte 한국외국어대학교 국제지역연구센터 2016 International Area Studies Review Vol.19 No.3
Several authors have studied the factors that influence a firm’s export performance, but few have addressed the relationship between industry characteristics and export intensity. The objective of the present study was to analyze the impact of industry characteristics on a firm’s export intensity, the latter a measure commonly used to assess export performance, seeking to add empirical evidence to this relatively neglected research area. Based on a sample of 19,504 Portuguese manufacturing firms, 7,930 of which were exporting, during the period 2010–2013, and using panel data estimation, the empirical results show that some industry characteristics (labor productivity, export orientation, concentration), as well as characteristics of the firm (labor productivity, size and age of the firm) are important determinants of a firm’s export intensity. It is concluded in particular that a firm’s export intensity is positively affected by the export orientation of the industry, as well as by the firm’s labor productivity, confirming the belief that firms and governments need to direct their policies towards increased productivity in order to improve competitiveness in foreign markets. It is argued that, in order to enhance the positive effects of these policies, the policies should be directed towards industries with the highest export focus.
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Changes in Coagulation Study and Risk of Developing Cholesteatoma: Is There a Link?
Costa Joana Raquel,Rego Ângela Reis,Soares Teresa,Sousa Cecília Almeida e,Coutinho Miguel Bebiano 대한청각학회 2023 Journal of Audiology & Otology Vol.27 No.1
Background and Objectives: The etiopathogenesis of acquired pediatric cholesteatoma has not yet been fully clarified. Recent studies and modern technologies have led researchers to look for explanations at a molecular level. This study aims to understand if the origins of cholesteatoma could be related to dysfunctions in coagulation factors, thereby emphasizing its role in angiogenesis.Subjects and Methods: This was a retrospective case-control study carried out at a tertiary hospital center between January 2010 and December 2020. The study included 92 children. The variables of the summary coagulation study (partial thromboplastin time, prothrombin time, and international normalized ratio) were compared among children with and without development of chronic otitis media with cholesteatoma.Results: The cases and controls were comparable in terms of age, type, and number of times that ventilation tubes were placed. Partial thromboplastin times tended to be higher in children who developed cholesteatoma, with a statistically significant difference between the two groups in terms of normal and abnormal partial thromboplastin times (<i>p</i>=0.029).Conclusions: The results of this case control study indicate that slight extension of partial thromboplastin times in the coagulation study may not meet the criteria for diagnosis of certain hematological pathologies or clinical significance, but at a molecular level may already have implications for activation of angiogenesis and other growth factors involved in the onset, growth, and expansion of acquired pediatric cholesteatoma.
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Sebastião van Uden,Joana Silva-Correia,Joaquim Miguel Oliveira,Rui Luís Reis 한국생체재료학회 2017 생체재료학회지 Vol.21 No.4
Background: Intervertebral disc degeneration has an annual worldwide socioeconomic impact masked as low back pain of over 70 billion euros. This disease has a high prevalence over the working age class, which raises the socioeconomic impact over the years. Acute physical trauma or prolonged intervertebral disc mistreatment triggers a biochemical negative tendency of catabolic-anabolic balance that progress to a chronic degeneration disease. Current biomedical treatments are not only ineffective in the long-run, but can also cause degeneration to spread to adjacent intervertebral discs. Regenerative strategies are desperately needed in the clinics, such as: minimal invasive nucleus pulposus or annulus fibrosus treatments, total disc replacement, and cartilaginous endplates decalcification. Main body: Herein, it is reviewed the state-of-the-art of intervertebral disc regeneration strategies from the perspective of cells, scaffolds, or constructs, including both popular and unique tissue engineering approaches. The premises for cell type and origin selection or even absence of cells is being explored. Choice of several raw materials and scaffold fabrication methods are evaluated. Extensive studies have been developed for fully regeneration of the annulus fibrosus and nucleus pulposus, together or separately, with a long set of different rationales already reported. Recent works show promising biomaterials and processing methods applied to intervertebral disc substitutive or regenerative strategies. Facing the abundance of studies presented in the literature aiming intervertebral disc regeneration it is interesting to observe how cartilaginous endplates have been extensively neglected, being this a major source of nutrients and water supply for the whole disc. Conclusion: Several innovative avenues for tackling intervertebral disc degeneration are being reported – from acellular to cellular approaches, but the cartilaginous endplates regeneration strategies remain unaddressed. Interestingly, patientspecific approaches show great promise in respecting patient anatomy and thus allow quicker translation to the clinics in the near future.
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