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Comparison of Interactions Between Control and Mutant Macrophages
This paper presents a preliminary study on macrophages migration in Drosophila embryos, comparing two types of cells. The study is carried out by a framework called macrosight which analyses the movement and interaction of migrating macrophages. The framework incorporates a segmentation and tracking algorithm into analysing motion characteristics of cells after contact. In this particular study, the interactions between cells is characterised in the case of control embryos and Shot3 mutants, where the cells have been altered to suppress a specific protein, looking to understand what drives the movement. Statistical significance between control and mutant cells was found when comparing the direction of motion after contact in specific conditions. Such discoveries provide insights for future developments in combining biological experiments to computational analysis
KIBS Innovative Entrepreneurship Networks on Social Media
The analysis of the use of social media for innovative entrepreneurship in
the context has received little attention in the literature, especially in the
context of Knowledge Intensive Business Services (KIBS). Therefore, this paper
focuses on bridging this gap by applying text mining and sentiment analysis
techniques to identify the innovative entrepreneurship reflected by these
companies in their social media. Finally, we present and analyze the results of
our quantitative analysis of 23.483 posts based on eleven Spanish and Italian
consultancy KIBS Twitter Usernames and Keywords using data interpretation
techniques such as clustering and topic modeling. This paper suggests that
there is a significant gap between the perceived potential of social media and
the entrepreneurial behaviors at the social context in business-to-business
(B2B) companies.Comment: This paper was presented on the EU-SPRI Early Career Researcher
Conference (ECC) on Innovative Entrepreneurship. Politecnico di Milano
(POLIMI). Milan, Italy. November 23rd and 24th, 201
Detectability of Varied Hybridization Scenarios using Genome-Scale Hybrid Detection Methods
Hybridization events complicate the accurate reconstruction of phylogenies,
as they lead to patterns of genetic heritability that are unexpected under
traditional, bifurcating models of species trees. This has led to the
development of methods to infer these varied hybridization events, both methods
that reconstruct networks directly, and summary methods that predict individual
hybridization events. However, a lack of empirical comparisons between methods
- especially pertaining to large networks with varied hybridization scenarios -
hinders their practical use. Here, we provide a comprehensive review of popular
summary methods: TICR, MSCquartets, HyDe, Patterson's D-Statistic (ABBA-BABA),
D3, and Dp. TICR and MSCquartets are based on quartet concordance factors
gathered from gene tree topologies and Patterson's D-Statistic, D3, and Dp use
site pattern frequencies to identify hybridization events. We then use
simulated data to address questions of method accuracy and ideal use scenarios
by testing methods against complex networks which depict gene flow events that
differ in depth (timing), quantity (single vs. multiple, overlapping
hybridizations), and rate of gene flow. We find that deeper or multiple
hybridization events may introduce noise and weaken the signal of
hybridization, leading to higher false negative rates across methods. Despite
some forms of hybridization eluding quartet-based detection methods,
MSCquartets displays high precision in most scenarios. While HyDe results in
high false negative rates when tested on hybridizations involving ghost
lineages, HyDe is the only method to be able to separate hybrid vs parent
signals. Lastly, we test the methods on ultraconserved elements from the bee
subfamily Nomiinae, finding the possibility of hybridization events between
clades which correspond to regions of poor support in the species tree
estimated in the original study
Formación de equipos en función de la extroversión de sus integrantes: un experimento replicado
Durante los cursos académicos 2010/2011 y
2011/2012 se han llevado a cabo un experimento y
una réplica del mismo en el marco de la asignatura de
bases de datos. La caracterÃstica más destacable de
estos estudios radica en que los equipos se han formado
en función de un factor de personalidad de los
miembros de los mismos, en concreto la extroversión.
El objetivo de ambos estudios empÃricos consiste en
comprobar si el grado de extroversión del equipo (en
función de la extroversión de los miembros del mismo)
afecta, por un lado, a la calidad final de los
productos software desarrollados y, por otro lado, a la
satisfacción de los miembros del equipo durante el
desarrollo de dichos productos. En este trabajo se
presentan los resultados obtenidos en la réplica y la
agregación de los resultados de ambos estudios.
Como principal conclusión, cabe destacar que tanto la
réplica como la agregación de resultados afianzan los
resultados del experimento original, que establecÃan
que a la hora de formar equipos, si el docente equilibra
el número de estudiantes con carácter extrovertido
y no extrovertido, conseguirá un alto nivel de satisfacción
durante la realización de los proyectos sin que
la calidad de los productos software desarrollados se
vea mermada.A controlled experiment and a replication of it have
been carried out during the academic courses
2010/2011 and 2011/2012 in the context of a databases
subject. The most remarkable characteristic of
these studies relies on the fact that the work-teams
were set according to a personality factor of their
members (extroversion). The goal of the studies is to
check whether the extroversion degree of the teams
(accordingly to the extroversion degree of their members)
affects, on one hand, the global quality of the
software products developed and, on the other hand,
the satisfaction perceived by the members of the
teams while developing those products. In this work,
we present the results of the replication and the aggregation
of both studies. As a main conclusion, all
these results strengthen the conclusion obtained in the
original controlled experiment. This conclusion states
that balancing the number of extroverted and nonextroverted
students in a team-work, makes the
overall satisfaction level achieved to be the highest
while the quality of the software products developed
is not reduced
Determinación de los Ãndices de salud nutricional de la leche fresca de bovino mediante espectroscopÃa de infrarrojo cercano
Bovine milk is one of the most complete foods that exist. During the last decades, milk FA have shown to improve human health due to the reduction in risk of cardiovascular disease and related pathologies. The aim of this study was to evaluate the feasibility of near infrared spectroscopy (NIRS) reflectance analysis to predict the nutritional value, fatty acid (FA) composition, and health index of fresh milk from dairy cows of pastoral systems. The prediction of Atherogenicity and Thrombogenicity indexes, along with other FA ratios in fresh milk samples by NIRS were precise and accurate. In addition, the calibration model obtained by NIRS provides an opportunity for the routine quantification of milk’s healthy FA such as omega-3 and conjugated linoleic acid (CLA), with applications in the dairy industry for food labeling, and at the farm level for management of the dairy cow’s diet.La leche bovina es uno de los alimentos más completos que existe. Durante la última década, se ha demostrado que los ácidos grasos de la leche pueden mejorar la salud humana, a través de la reducción del riesgo de enfermedades cardiovasculares y patologÃas asociadas. El objetivo de este estudio fue evaluar la factibilidad del análisis de reflectancia NIRS para predecir valor nutricional, composición de ácidos grasos e Ãndices de salud de leche fresca de vacas de sistemas lecheros pastoriles. La predicción por NIRS del Ãndice aterogénico y trombogénico, de ácidos grasos en muestras de leche fresca, fueron precisos. Por tanto, el modelo de calibración obtenido por NIRS representa una oportunidad para la cuantificación rutinaria de los ácidos grasos saludables de la leche como omega-3 y CLA, con aplicaciones en la industria lechera para el etiquetado nutricional y a nivel de lecherÃa para el manejo de la alimentación de las vacas
Exploration of the treatment of fish-canning industry effluents by aqueous-phase reforming using Pt/C catalysts
In the current work, an exploratory study on the application of catalytic aqueous phase reforming (APR) to the treatment of fish-canning wastewater was performed for the first time. Pt/C (3%, w) catalysts were supported on different commercial carbon supports (two activated carbons and a carbon black) and tested in the APR of tuna-cooking wastewater. The effect of the supports and the reaction systems (batch vs. semi-continuous) on the performance of the catalysts was tested. The stability of the catalysts upon 3 successive reuse cycles was checked. TOC and COD removal ranged within 45-60%, which was ascribed to adsorption on the supports, hydrothermal carbonization and APR. The percentage of valuable gases (H2 and alkanes) reached up to 18% of the gas production showing the potential of APR for the valorization and treatment of wastewater. The production of gases is affected by the high chloride, acetate and phosphate concentrations, which may provoke catalyst deactivation. The use of a catalyst with a basic support significantly increased the production of gases and the H2 percentage in the gas fraction. Gas production was higher in semi-continuous compared to batch operation, maybe because the withdrawn gas displaces the reaction towards the products. The percentage of alkanes in the gas phase decreased upon successive catalyst reuse cycles at the expense of H2, which is probably due to sintering of Pt nanoparticles with the corresponding decrease of the number of low-coordinated Pt sites promoting methanation reactionsThe authors greatly appreciate financial support from Spanish MINECO (CTQ2015-65491-R). A. S. Oliveira thanks the Spanish MINECO for a research grant (BES-2016-077244
Generation and Distribution of Quantum Oblivious Keys for Secure Multiparty Computation
The oblivious transfer primitive is sufficient to implement secure multiparty
computation. However, secure multiparty computation based only on classical
cryptography is severely limited by the security and efficiency of the
oblivious transfer implementation. We present a method to efficiently and
securely generate and distribute oblivious keys by exchanging qubits and by
performing commitments using classical hash functions. With the presented
hybrid approach, quantum and classical, we obtain a practical and high-speed
oblivious transfer protocol, secure even against quantum computer attacks. The
oblivious distributed keys allow implementing a fast and secure oblivious
transfer protocol, which can pave the way for the widespread of applications
based on secure multiparty computation.Comment: 11 pages, 5 figure
KIBS Innovative Entrepreneurship Networks on Social Media
The analysis of the use of social media for innovative entrepreneurship in the context has received little attention in the literature, especially in the context of Knowledge Intensive Business Services (KIBS). Therefore, this paper focuses on bridging this gap by applying text mining and sentiment analysis techniques to identify the innovative entrepreneurship reflected by these companies in their social media. Finally, we present and analyze the results of our quantitative analysis of 23.483 posts based on eleven Spanish and Italian consultancy KIBS Twitter Usernames and Keywords using data interpretation techniques such as clustering and topic modeling. This paper suggests that there is a significant gap between the perceived potential of social media and the entrepreneurial behaviors at the social context in business-to-business (B2B) companies
A Method Based on a Nonlinear Generalized Heisenberg Algebra to Study the Molecular Vibrational Spectrum
We propose a method, based on a Generalized Heisenberg Algebra (GHA), to
reproduce the anharmonic spectrum of diatomic molecules. The theoretical
spectrum generated by GHA allows us to fit the experimental data and to obtain
the dissociation energy for the carbon monoxide molecule. Our outcomes are more
accurate than the standard models used to study molecular vibrations, namely
the Morse and the -oscillator models and comparable to the perturbed Morse
model proposed by Huffaker \cite{hf}, for the first experimental levels. The
dissociation energy obtained here is more accurate than all previous models
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