54 research outputs found
A Comparative Study on the Profitability Performance of European Innovative and Social Startups in Pre-Covid and Covid Periods
No full textThis study examines the profitability performance of innovative and social startups across six European countries, comparing pre-Covid (2017–2019) and Covid (2020–2022) periods. By analyzing data from a sample of 7,179 startups using panel regression models, we investigate the relationship between profitability and several potential drivers, such as financial structure, liquidity, size, and the size of the board of directors. Our findings reveal divergent trends between innovative and social startups, highlighting the complex, context-dependent nature of startup performance. They also show that these relationships vary across different startup types and economic conditions. This research contributes to the literature on startup performance by offering insights into the differential impacts of economic shocks on various types of new ventures. It emphasizes the need for adaptive strategies in uncertain economic contexts. The findings provide valuable insights for entrepreneurs, investors, and policymakers seeking to foster resilient startup ecosystems. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025
Bug Analysis Report
No full textThe full set of bug reports that were analyzed in the paper "Empirical analysis of software failures in the OpenStack cloud computing platform" (ESEC/FSE '19)Please, cite the following paper if you use the dataset:@inproceedings{cotroneo2019bad,title={How bad can a bug get? an empirical analysis of software failures in the OpenStack cloud computing platform},author={Cotroneo, Domenico and De Simone, Luigi and Liguori, Pietro and Natella, Roberto and Bidokhti, Nematollah},booktitle={Proceedings of the 2019 27th ACM Joint Meeting on European Software Engineering Conference and Symposium on the Foundations of Software Engineering},pages={200--211},year={2019}
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Failure dataset
No full textThis failure dataset contains the injected faults, the workload, the effects of failure (both the user-side impact and our own in-depth correctness checks), and the error logs produced by the OpenStack cloud management system.Please refers to the paper "Empirical analysis of software failures in the OpenStack cloud computing platform" (ESEC/FSE '19).Please, cite the following paper if you use the dataset:@inproceedings{cotroneo2019bad,title={How bad can a bug get? an empirical analysis of software failures in the OpenStack cloud computing platform},author={Cotroneo, Domenico and De Simone, Luigi and Liguori, Pietro and Natella, Roberto and Bidokhti, Nematollah},booktitle={Proceedings of the 2019 27th ACM Joint Meeting on European Software Engineering Conference and Symposium on the Foundations of Software Engineering},pages={200--211},year={2019}
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miRNA-Mediated KHSRP Silencing Rewires Distinct Post-transcriptional Programs during TGF-β-Induced Epithelial-to-Mesenchymal Transition
No full textSummaryEpithelial-to-mesenchymal transition (EMT) confers several traits to cancer cells that are required for malignant progression. Here, we report that miR-27b-3p-mediated silencing of the single-strand RNA binding protein KHSRP is required for transforming growth factor β (TGF-β)-induced EMT in mammary gland cells. Sustained KHSRP expression limits TGF-β-dependent induction of EMT factors and cell migration, whereas its knockdown in untreated cells mimics TGF-β-induced EMT. Genome-wide sequencing analyses revealed that KHSRP controls (1) levels of mature miR-192-5p, a microRNA that targets a group of EMT factors, and (2) alternative splicing of a cohort of pre-mRNAs related to cell adhesion and motility including Cd44 and Fgfr2. KHSRP belongs to a ribonucleoprotein complex that includes hnRNPA1, and the two proteins cooperate in promoting epithelial-type exon usage of select pre-mRNAs. Thus, TGF-β-induced KHSRP silencing is central in a pathway leading to gene-expression changes that contribute to the cellular changes linked to EMT
OpenStack fault injection environment
No full textThe artifact includes tools to repeat the fault-injection experiments presented in the paper "How Bad Can a Bug Get? An Empirical Analysis of Software Failures in the OpenStack Cloud Computing Platform" (ESEC/FSE '19).Please note that this artifact does not include a fault injection tool since we transferred the ownership of the tool to our industry partners. Therefore, the artifact includes pre-injected source-code files. Before every fault injection test, an original source-code file is replaced with a pre-injected file, and it is restored after the test.Please, cite the following paper if you use the artifact:@inproceedings{cotroneo2019bad,title={How bad can a bug get? an empirical analysis of software failures in the OpenStack cloud computing platform},author={Cotroneo, Domenico and De Simone, Luigi and Liguori, Pietro and Natella, Roberto and Bidokhti, Nematollah},booktitle={Proceedings of the 2019 27th ACM Joint Meeting on European Software Engineering Conference and Symposium on the Foundations of Software Engineering},pages={200--211},year={2019}}</div
Author Correction: Neural control of fasting-induced torpor in mice (Scientific Reports, (2019), 9, 1, (15462), 10.1038/s41598-019-51841-2)
No full textIn this Article, there is a repeated typographical error in the legends of Figure 1, 2 and 3 where, “§p ̧ 0.05 vs. Fasting group; #p ̧ 0.05 vs. all other conditions.” should read: “#p ̧ 0.05 vs. Fasting group; §p 0.05 vs. all other conditions.”
Modelo de previsão da demanda para as indústrias atuantes no setor de infra-estrutura brasileiro dos segmentos de energia elétrica e telecomunicações
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenhara de Produção.Proposição de um modelo de processo de previsão da demanda - combinando métodos quantitativos e qualitativos - para as indústrias atuantes no setor de infra-estrutura brasileiro dos segmentos de Energia Elétrica e Telecomunicações, baseando-se em recentes pesquisas e bibliografia sobre o tema e no estudo de caso do processo de previsão em empresas destes segmentos. O modelo consiste em um processo que combina métodos quantitativos e qualitativos de julgamento, ressaltando a necessidade de se utilizar os primeiros sempre que as séries temporais permitirem - preferencialmente os mais simples - e sistematizando o emprego das técnicas qualitativas de modo a minimizar a introdução de viés por julgamento
Electical properties of pure and Co-substituted ZnO thin films investigated by UV-assisted SPM experiments
No full text2016 - 2017ZnO is an intrinsic n-type, wide band-gap (3.4 eV at 0 K), semiconductor which has been attracted the interest of the scientific community for several decades. More recently, ZnO has caught a renewed interest due to the improvements in the epitaxial growth techniques as well as to the possibility of p-type conductivity and ferromagnetic behaviour as a consequence of cation doping. In addition to this, as it shows much stronger electric polarization effects than other wide-gap semiconductors, such as GaN and SiC, ZnO has a great potential for manufacturing energy-harvesting systems. Moreover, as ZnO is a semiconducting piezoelectric material, it is already widely used in electro-mechanical systems for making smart sensors and nano-actuators and in communications for surface acoustic wave and thin film bulk acoustic wave resonator devices. However, the potential applications of ZnO as well as of various transition-metal oxides, e.g. TiO2, V2O5, and SnO2, is affected by their electronic structure and surface chemistry. In particular, the material band structure can be properly designed and tuned by electron doping or atom substitution, whereas the stabilization of surface defects, chemistry and reactivity is still a largely unexplored field. In this work the effect of Co-substitution on the electronic, electromechanical and surface properties of ZnO thin films (50 nm in thickness) has been deeply investigated. The substitution of Zn with Co atoms ensures no electrical doping, since the valence number of Zn and Co is the same. However, a 5% content of Co-substitution in ZnO has been previously shown to be enough to affect the electron conductivity of ZnO and to induce ferromagnetism in the semiconducting oxide. This behaviour has been theoretically addressed to the capability of Co to affect ZnO electronic band structure, by bonding the oxygen vacancies (typical ZnO intrinsic defects), introducing additional spin-polarized electronic levels close to the conduction band edge. Being spatially localized around the Co-complexes, these levels may alter the concentration of free carriers in intrinsically n-type ZnO, hence its bulk conductivity. These effects of Co-substitution on magnetic and conductive properties of ZnO have been recently studied by means of “bulk” experimental (X-ray absorption near edge structure, Hall measurements, magnetization measurements, etc.) and theoretical investigation techniques (DFT, calculation for isolated defect in a crystal matrix, etc.). On the contrary, in the case of our nano-sized thin films (50 nm in thickness) it is of fundamental importance to distinguish between “bulk” effect of Co-substitution and surface properties as well as eventual high defect concentration. In this scenario, scanning probe microscopy based experiments, such as conductive atomic force microscopy, electrostatic force microscopy, Kelvin probe force microscopy and piezo-response force microscopy, have been used to study the effect of Co-substitution on ZnO surface reactivity, work function, piezoelectricity and charge storage. The complexity of the observed phenomena required a deep study in different environmental conditions, such as in air and ultra-high vacuum, dark and under monochromatic UV light irradiation. In this thesis, it will be demonstrated that Co-substitution (5% content) deeply affect ZnO work function, leading to a 410 meV downward shift of the Fermi level, towards the valence band, and surface reactivity, inhibiting the adsorption of reactive molecular species at the surface. On the contrary, it does not affect ZnO piezoelectricity and charge storage phenomenon. These findings will be discussed in the framework of existing theoretical model. [edited by Author]XXX cicl
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