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A Saccharomyces cerevisiae RC016-based feed additive reduces liver toxicity,residual aflatoxin B1 levels and positively influences intestinal morphology in broiler chickens fed chronic aflatoxin B1-contaminated diets

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Animal Nutrition 2020年第1期6卷 31-38页

作者： Valeria Poloni Alejandra Magnoli Analía Fochesato Andrea Cristofolini Matias Caverzan Cecilia Merkis Maríana montenegro Lilia Cavaglieri Departamento de Microbiología e Inmunología Universidad Nacional de Río CuartoRío CuartoArgentina Consejo Nacional de Investigaciones Científicas y Tecnólogicas(CONICET) Buenos AiresArgentina Departamento de Microscopía Electrónica Universidad Nacional de Río CuartoRío CuartoArgentina Centro de Investigaciones y Transferencia Villa María Universidad Nacional de Villa MaríaVilla MaríaArgentina

The present study was conducted to investigate the ability of Saccharomyces cerevisiae RC016(Sc)-based feed additive to reduce liver toxicity,residual aflatoxin B1(AFB1)levels and influence intestinal structure in broiler chickens fed chronic aflatoxin B1-contaminated diets.A total of 100 one-day-old male commercial line(Ross)broiler chickens were divided into 4 treatments,with 5 pens per treatment and 5 broiler chickens per *** were randomly assigned to 4 treatments,which were namely treatment 1(T1),control diet(CD);T2,CD+Sc at 1 g/kg;T3,CD+AFB1 at 100μg/kg;T4,CD+Sc at 1 g/kg+AFB1 at100μg/*** liver histopathology of broiler chickens fed diets with AFB1 showed diffused microvacuolar fatty *** addition of Sc showed normal hepatocytes similar to the *** small intestine villi from AFB1 group showed atrophy,hyperplasia of goblet cells,prominent inflammatory infiltrate and *** contrast,the small intestine villi from birds that received the yeast plus AFB1 showed an absence of inflammatory infiltrate,and atrophy;moreover,a lower number of goblet cells compared to the groups with AFB1 was *** morphometric intestine studies showed that a significant decrease(P0.05),there was a tendency to improve these *** residual levels of AFB1 in livers were significantly reduced(P<0.05)in the presence of the *** present work demonstrated that the addition of Sc alone or in combination with AFB1 in the broiler chicken diets had a beneficial effect in counteracting the toxic effects of AFB1 in livers besides improving the histomorphometric parameters and modulating the toxic effect of AFB1 in the intestine.

关键词： Aflatoxin B1 Broiler chickens Histomorphometry Histopathology toxic effects

Design of Station Keeping Mode for Attitude Orbit Control Subsystem of T-SAT

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Computer Aided Drafting,Design and Manufacturing 2010年第2期20卷 78-84页

作者： SALOMON montenegro KENDRICK Amezquita School of Astronautics Beijing University of Aeronautics and Astronautics School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics

Station keeping mode （SKM） for Attitude Orbit Control Subsystem （AOCS）; it is an operational approach regarding the attitude dynamics control. The essential features of the design methodology is researching the basic theory and then afterwards, make an iterative design approach using some premise/assumptions, implementing the system simulation through the Simulink Matlab software package, designing the required controllers, monitor and analyzing the responses until the design give the best results within the range required. Firstly the thruster configuration is designed to acquire the parameters of the torque on the satellite. Next, the controllers are based on the well known PID control law. Controllers optimize the attitude and are used during the maneuvers for SKM. Afterwards the simulation results are given, and presented to demonstrate the performance and validity of the AOCS design approach. Finally the simulation results demonstrate that all the requirements were accomplished and the Station Keeping Mode was successfully designed.

关键词： communication satellite AOCS East/West station keeping

Symbolism of the Shadows in Son of Man by Roa Bastos

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Cultural and Religious Studies 2015年第4期3卷 185-200页

作者： Patricia G. montenegro Cheyney University of Pennsylvania Cheyney USA

In his novel Son of Man, Augusto Roa Bastos uses images and symbols of shadows to represent the ramifications ofthe Paraguayan Dr. Jose Rodriguez de Francia＇s dictatorship. Rodriguez de Francia＇s legacy, which begins duringthe postcolonial years and extends well into the 20th century, resonates in the novel in soeio-political structures andcharacters＇ ideologies and behaviors. It allows for plantation owners to enslave workers and their families; itconfines and oppresses people through unfounded legends and myths; and among other things, it creates a falseidea of purpose and patriotism in the Chaco War （1932-1935）, which in the end lets down the soldiers. Tocounteract these deleterious social conditions, Roa Bastos creates surreal characters, such as a fantastic helper whoaids plantation workers to escape dehumanizing situations. Roa Bastos also narrates how the people in Itapr, asmall town, make an idol of a Christ statue carved by one of their own. However, when the two Goiburfl brothersreplace the statue by crucifying their sister＇s rapist, the people＇s myth is destroyed. Likewise, Roa Bastos availshimself of Christian and Catholic concepts and symbols to transpose them into a humanistic ideology so as toconvey hope to his people through a new perspective. In this way, a new Annunciation takes place when the son ofa raped woman is born. In the end, Roa Bastos lets the course of these warped transpositions take their logicaldenouement： In the absence of a purpose beyond an earthly existence, death becomes the narrator＇s option.

关键词： Paraguay, Dr. Rodriguez de Francia, dictatorship, surrealism, myth, Chaco War, Annunciation, bornagain, halo

Linguistic Economy Applied to Programming Language Identifiers

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Journal of Software Engineering and Applications 2021年第1期14卷 1-10页

作者： Michael A. Dorin Sergio montenegro University of St. Thomas St. Paul USA Universitä t Würzburg Würzburg Germany

Though many different readability metrics have been created, there still is no universal agreement defining readability of software source code. The lack of a clear agreement of source code readability has ramifications in many areas of the software development life-cycle, not least of which being software maintainability. We propose a measurement based on Linguistic Economy to bridge the gap between mathematical and behavioral aspects. Linguistic Economy describes efficiencies of speech and is generally applied to natural languages. In our study, we create a large corpus of words that are likely to be found in a programmer’s vocabulary, and a corpus of existing identifiers found in a collection of open-source projects. We perform a usage analysis to create a database from both of these corpora. Linguistic Economy suggests that words requiring less effort to speak are used more often than words requiring more effort. This concept is applied to measure how difficult program identifiers are to understand by extracting them from the program source and comparing their usage to the database. Through this process, we can identify source code that programmers find difficult to review. We validate our work using data from a survey where programmers identified unpleasant to review source files. The results indicate that source files identified as unpleasant to review source code have more linguistically complicated identifiers than pleasant programs.

关键词： Corpus Programming Languages Comprehension Complicated

Chilean University Students Digital Learning Technology Usage Patterns and Approachesto Learning

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ECNU Review of Education 2022年第1期5卷 37-64页

作者： Carlos González Dany Lópeza Lina Calle-Arangoa Helena montenegro Paula Clasing Pontificia Universidad Catolica de Chile-Millennium Nucleus Universidad de Chile-Millennium Nucleus University of Michigan

Purpose:This study aims to explore Chilean students'digital technology usage patterns andapproaches to learningDesignlApproach/Methods:We conducted this study in two stages We worked with onesemester learning management systems(LMS),library,and students records data in the *** performed a k-means cluster analysis to identify groups with similar usage *** second stage,we invited students from emerging dusters to participate in group *** analysis was employed to analyze ***:Three groups were identified:ID digital library users/high performers,who adopteddeeper approaches to learning obtained higher marks,and used learning resources to integratematerials and expand understanding 2)LMS and physical library userslmid-performers,whoadopted mainly strategicapproaches obtained marks dlose to average,and used learning resources for studying in an organized manner toget good marks and 3)lower users of LMS andlibrarylmidlow performers,who adopted mainly a surface approach,obtained mid-to-lower-than-averagemarks,and used learning resources for minimum content understanding Originality/Value:We demonstrated the importance of combining learning analytics data withqualitative methods to make sense of digital technology usage patternss approaches to learningare associated with learning resources *** recommendations are presented.

关键词： Academic performance approaches to learning digital technology learning analytics

Right Ventricular Perforation after Pacemaker Implantation in an Elderly Woman： A Case Report

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Journal of Pharmacy and Pharmacology 2018年第7期6卷 679-682页

作者： Fernando S. montenegro Adventist Silvestre Hospital Guararapes Street 274 Cosme Velho Rio de Janeiro 22241220 Brasil

Background： Cardiac pacing is a proven and effective treatment used worldwide with a low incidence of complications depending on the patient group. Late lead perforation is a rare complication without a standard treatment. Case summary： We report a case of a 98-year old woman submitted to pacemaker implantation due to symptomatic second-degree atrio-ventricular block. After two days she returned to the hospital with thoracic pain and was diagnosed with RV （right ventricular） lead perforation. She was submitted to cardiac surgery with lead extraction and RV repair. Discussion： There are two major types of complications after pacemaker implantation, mechanical and infection. Reported perforation rates after pacemaker implantation range from 0.1%-0.8%. While acute lead perforation is very well described, late lead perforation is only described in case reports with a low rate of tamponade or death. Management of subacute or delayed RV lead perforation is not well defined due to very limited data. Question remains on whether to extract the lead or not.

关键词： Pacemaker cardiac surgery arrhythmia case report

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Sharing Song

小学生时代（大嘴英语） 2024年第9期 18-21页

作者： Pamela Love Laura montenegro(图) 不详

Sing a song of sharing Apples in a tree:Some for squirrels,and some for birds,And some of them for me.

关键词： some birds Apple

Disturbance Rejection in Space Applications:Problems and Solutions

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Disturbance Rejection in Space Applications:Problems and Sol...

Artificial intelligence in polyp detection-where are we and where are we headed?

第三十届中国控制会议

作者： Enrico Canuto Andrés Molano-Jimenez Carlos Perez-montenegro Politecnico di Torino Dipartimento di Automatica e Informatica Corso Duca degli Abruzzi 2410129 TorinoItaly

ISBN: (纸本)9781457706776

＜正＞In the propulsive phase of planetary landing like Mars or Moon when only soft landing is the target,guidance, navigation and control are driven by an Inertial Measurement Unit and a radar altimeter/*** measurements are affected by bias and scale（factor） errors,which are aggravated by the vehicle axis to be tilted with respect to the local vertical for most of the descent trajectory,and by the attitude navigation error cumulated during the ballistic（and aerodynamic） flight after the orbiter *** complementing the Centre-of-Mass dynamics with appropriate disturbance state equations driven by noise vectors,and by estimating noise from the model error,scale errors and bias can be real-time retrieved as disturbance state variables,then eliminated from the tracking errors through disturbance rejection, under convergence conditions and sensor *** same result is proved cannot be achieved under pure feedback control. The result shows a well known fact:bias can only be eliminated by disposing of different sensors.A typical case study is the attitude control of drag-free satellites where fine accelerometers allow to reject wide-band drag torques at the price of the attitude drifting because of the accelerometer *** is cancelled by treating it a disturbance to be estimated by attitude sensors like star *** runs illustrate the results.

关键词： Disturbance rejection Disturbance model Attitude control Planetary landing

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Artificial Intelligence in Gastrointestinal Endoscopy 2021年第6期2卷 211-219页

作者： Kristen E Dougherty Vatche J Melkonian Grace A montenegro Department of Surgery St.Louis University HospitalSaint LouisMO 63110United States

The goal of artificial intelligence in colonoscopy is to improve adenoma detection rate and reduce interval colorectal *** intelligence in polyp detection during colonoscopy has evolved tremendously over the last decade mainly due to the implementation of neural *** aided detection(CADe)utilizing neural networks allows real time detection of polyps and *** CADe systems are built in single centers by multidisciplinary teams and have only been utilized in limited clinical research *** review the most recent prospective randomized controlled trials *** randomized control trials,both non-blinded and blinded,demonstrated increase in adenoma and polyp detection rates when endoscopists used CADe systems vs standard high definition *** of polyps and adenomas detected were mainly small and sessile in *** systems were found to be safe with little added time to the overall *** are promising as more CADe have shown to have ability to increase accuracy and improve quality of *** limitations included selection bias as all trials built and utilized different CADe developed at their own institutions,non-blinded arms,and question of external validity.

关键词： Neural networks Computer aided detection Artificial intelligence in colonoscopy and polyp detection Artificial intelligence in adenoma detection