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Machine learning algorithm partially reconfigured on FPGA for an image edge detection system

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Journal of Electronic Science and Technology 2024年第2期22卷 48-68页

作者： Gracieth Cavalcanti batista Johnny Oberg Osamu Saotome Haroldo F.de Campos Velho Elcio Hideiti Shiguemori Ingemar Soderquist Division of Electronic and Embedded Systems KTH Royal Institute of TechnologyStockholm 16440Sweden Electronic Engineering Division Aeronautics Institute of TechnologySao Josédos Campos SP 12228-900Brazil Laboratory of Applied Computing and Mathematics National Institute for Space ResearchSao Josédos Campos SP 12227-900Brazil Department of C4ISR Institute of Advanced StudiesSao Josédos Campos SP 12228-001Brazil Saab AB Linkoping 58188Sweden

Unmanned aerial vehicles(UAVs)have been widely used in military,medical,wireless communications,aerial surveillance,*** key topic involving UAVs is pose estimation in autonomous navigation.A standard procedure for this process is to combine inertial navigation system sensor information with the global navigation satellite system(GNSS)***,some factors can interfere with the GNSS signal,such as ionospheric scintillation,jamming,or *** alternative method to avoid using the GNSS signal is to apply an image processing approach by matching UAV images with georeferenced *** a high effort is required for image edge *** a support vector regression(SVR)model is proposed to reduce this computational load and processing *** dynamic partial reconfiguration(DPR)of part of the SVR datapath is implemented to accelerate the process,reduce the area,and analyze its granularity by increasing the grain size of the reconfigurable *** show that the implementation in hardware is 68 times faster than that in *** architecture with DPR also facilitates the low power consumption of 4 mW,leading to a reduction of 57%than that without *** is also the lowest power consumption in current machine learning hardware ***,the circuitry area is 41 times *** with Gaussian kernel shows a success rate of 99.18%and minimum square error of 0.0146 for testing with the planning *** system is useful for adaptive applications where the user/designer can modify/reconfigure the hardware layout during its application,thus contributing to lower power consumption,smaller hardware area,and shorter execution time.

关键词： Dynamic partial reconfiguration(DPR) Field programmable gate array(FPGA)implementation Image edge detection Support vector regression(SVR) Unmanned aerial vehicle(UAV) pose estimation

Microalbuminuria and Kidney Disease Risk in HIV Patients Taking Combined Antiretroviral Therapy

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World Journal of AIDS 2014年第2期4卷 242-248页

作者： Huylmer Lucena Chaves mayanna pinho batista Adriana de Menezes Gomes Amanda Antunes Costa André Tigre Lima Vinícius Diniz Arcelino do Ceará Pedro Rubens Araújo Carvalho Linna Albuquerque Sampaio Fabrício de Maicy Bezerra Melissa Soares Medeiros Medicine School Unichristus Fortaleza Brazil

Objectives: This study proposes to evaluate risk factors for kidney disease in HIV patients treated chronically and correlate with microalbuminuria measurements. Methods: Review charts and analyses of microalbuminuria in subgroup of HIV patients treated at Ceara/Brazil. Results: 149 patients, 69.1% male, mean 38.5 years old, infection mean 86.8 months. Mean Creatinine Clearance 110.2%, Creatinine 0.97, Urea 27.76 mg/dl, CD4+ 600.37 cels/mm3 and detectable viral load 530.59 copies with 61.7% undetectable. Mean Dosages of microalbuminuria/24h 147, 46 ± 820, 45 (N = 48) and microalbuminuria (mg/dl) 32.05 ± 85.25 (N = 43). Kidney Diseases Classification analyses evidenced 6.4% patients in stages ≥3 and 6.2% presented altered Microalbuminuria/24h. Patients using Tenofovir (TDF) 27.27% had Stage 2 and protease inhibitors (PI) had 4.1% in Stage 3. Proteinuria was observed in 5% stage ≥3. Association PI/TDF had 4.1% in Stage 3. No statistical difference between CD4 > or 3 and microalbuminuria/24h > 300 mg (p = 0.69);detectable/undetectable viral load and microalbuminuria/24h (p = 0.63) or stage ≥3 (p = 0.17);relation to Diabetes or arterial hypertension and microalbuminuria 24 h (p = 0.5 and p = 0.21);relation stage ≥3 and microalbuminuria/24h (p = 0.33);relation HIV diagnoses >/ or or < 50 years and microalbuminuria/24h (p = 0.55) or microalbuminuria mg/d (p = 0.32). Relating comorbidities risk (Diabetes Mellitus plus Systemic Arterial Hypertension) to Kidney Diseases, it was found that 55.5% patients in Stage 3 or above with comorbidities compared with 15% with comorbidities in lower stages (P = 0.005). Nevertheless, comorbidities presence was not associated with microalbuminuria (p = 0.08). Conclusion: Kidney disease is a real risk for HIV patients and stages ≥

关键词： HIV AIDS Antiretroviral Kidney Disease Microalbuminuria

Phylogeny,identification and pathogenicity of the Botryosphaeriaceae associated with collar and root rot of the biofuel plant Jatropha curcas in Brazil,with a description of new species of Lasiodiplodia

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Fungal Diversity 2014年第4期67卷 231-247页

作者： Alexandre Reis Machado Danilo batista pinho Olinto Liparini Pereira Departamento de Fitopatologia Universidade Federal de VicosaVicosa 36570-000Brazil

The global expansion of cultivation areas of Jatropha has contributed to the emergence of various *** in Brazil,the occurrence of a new disease has been reported that not only reduces the productivity but also causes the death of *** disease is associated with collar and root rot of *** morphological and phylogenetic studies(based on Internal Transcribed Spacers,β-tubulin and Translation Elongation Factor 1-αsequences),nine species of Botryosphaeriaceae were *** species include Lasiodiplodia egyptiacae,***,***,Macrophomina phaseolina,Neoscytalidium hyalinum and four Lasiodiplodia *** are proposed as new species(***,***,*** and ***).All the species in this study,except ***,are *** results show that root rot of physic nut plants is caused by complex *** study provides new information for future studies of disease management,quarantine programs and,especially,the development of resistant varieties for collar and root rot disease in ***.

关键词： Aetiology Botryosphaeriales Dothideomycetes Phylogeny Taxonomy Tropical fungi

Machine learning assisted derivation of minimal low-energy models for metallic magnets

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npj Computational Materials 2023年第1期9卷 353-364页

作者： Vikram Sharma Zhentao Wang Cristian D.batista Department of Physics and Astronomy The University of TennesseeKnoxvilleTN 37996USA School of Physics and Astronomy University of MinnesotaMinneapolisMN 55455USA Quantum Condensed Matter Division and Shull-Wollan Center Oak Ridge National LaboratoryOak RidgeTN 37831USA Present address:Center for Correlated Matter and School of Physics Zhejiang UniversityHangzhou 310058China

We consider the problem of extracting a low-energy spin Hamiltonian from a triangular Kondo Lattice Model(KLM).The non-analytic dependence of the effective spin-spin interactions on the Kondo exchange excludes the use of perturbation theory beyond the second *** then introduce a Machine Learning(ML)assisted protocol to extract effective two-and four-spin *** resulting spin model reproduces the phase diagram of the original KLM as a function of magnetic field and single-ion anisotropy and reveals the effective four-spin interactions that stabilize the field-induced skyrmion crystal ***,this model enables the computation of static and dynamical properties with a much lower numerical cost relative to the original KLM.A comparison of the dynamical spin structure factor in the fully polarized phase computed with both models reveals a good agreement for the magnon dispersion even though this information was not included in the training data set.

关键词： Kondo dynamical derivation

Impact of microbial self-induced anaerobiosis fermentation(SIAF)on coffee quality

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Food Bioscience 2022年第3期47卷 421-430页

作者： Marcela Caroline batista da Mota Nádia Nara batista Disney Ribeiro Dias Rosane Freitas Schwan Department of Biology Federal University of LavrasLavrasMGBrazil Food Science Department Federal University of LavrasLavrasMGBrazil

The fermentation of natural(NC)and pulped coffee(PC)was performed with a conventional method(platform)and under self-induced anaerobic fermentation(SIAF).Of the 12 samples analyzed during the fermentation process,the highest temperature was obtained by the SIAF method(30.5℃ for NC and 29.67℃ for PC)with 87 h of *** compounds(36 samples)were evaluated by high-performance liquid *** in the SIAF method contributed to the maximum amount of citric acid(2.534 mg/g)in pulped coffee and acetic acid(6.04 mg/g)and lactic acid(2.533 mg/g)in *** was the primary chemical class detected,followed by ketones and *** coffees(12 samples)were evaluated five times and classified as specialty coffees(>80 points)following Specialty Coffee Association(SCA)*** pulped coffee processed by the SIAF method showed a 2.83-point increase in the sensory score compared to the conventional ***,the SIAF method is accessible to producers,contributes to coffees with differentiated sensory profiles,and increases beverage quality.

关键词： Bioreactor Fermentative process Specialty coffee Anaerobic conditions Natural processing

A noncoding secret to stay young—protecting T_(reg)cells to keep the balance in the liver

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Science China(Life Sciences) 2023年第11期66卷 2694-2696页

作者： Hiep Tai Nguyen Pedro J.batista Laboratory of Cell Biology Center for Cancer ResearchNational Cancer InstituteNational Institutes of HealthBethesda MD 20892 USA

The liver plays a crucial role in maintaining whole-body metabolic homeostasis and harbors a distinct immune environment(Robinson et al.,2016).However,during the aging process,the liver undergoes structural and functional changes that can disrupt the delicate balance between the immune system and liver *** age-related alterations can lead to increased susceptibility to metabolic diseases,including non-alcoholic fatty liver disease(NAFLD),and impairments in immune cell regulation and tissue repair(Albillos et al.,2022;Anstee et al.,2019).

关键词： al. alterations homeostasis

Epidemiology and Clinical Features of Mycobacterium avium Complex Pulmonary Disease in a Brazilian Amazon Cohort

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Advances in Microbiology 2024年第6期14卷 287-302页

作者： Jose Tadeu Colares Monteiro Adriana Rodrigues Barretto Ruan Seguin Azevedo Quaresma Bianca Miranda Gouveia Ismari Perini Furlaneto Victória Menezes da Costa Yan Corrêa Rodrigues Layana Rufino Ribeiro Ricardo J. de Paula Souza e Guimarães Alex Brito Souza Ana Roberta Fusco da Costa Karla Valéria batista Lima Joao de Barros Barreto University Hospital Federal University of Par Belm Brazil Center for Biological and Health Sciences Ph.D. Program in Parasitic Biology in the Amazon Region (PPGBPA) State University of Par (UEPA) Belm Brazil Department of Medicine Centro Universitrio do Par CESUPA Belm Brazil Bacteriology and Mycology Section Evandro Chagas Institute (SABMI/IEC) Ministry of Health Ananindeua Brazil Geoprocessing Laboratory Evandro Chagas Institute/SVSA/MS Ananineua Brazil

The incidence of Mycobacterium avium complex pulmonary disease (MACPD) has been globally increasing. The present study aims to provide a comprehensive analysis of clinical characteristics and treatment response among patients in the Amazon region of Brazil and conduct a retrospective cohort study at a prominent referral hospital in the State of Par, Brazil, from 2012 to 2020. The M. avium group represented 58.9% of cases, followed by M. intracellulare (35.7%), M. colombiense (3.6%), and M. chimaera (1.8%). The majority of patients (73.2%) were female and with an average age of 63 years. Primary clinical manifestations included persistent cough and sputum production. The Charlson comorbidity index (CCI) averaged 2.47, with 36.3% of patients having a CCI score equal to higher than 3. Notably, over 70% of patients had received treatment for pulmonary tuberculosis before initiating treatment for MAC infection. The fibrocavitary radiologic form was the most prevalent (55.4%), frequently exhibiting a bilateral distribution (53.6%). Antimicrobial susceptibility revealed a significant prevalence of MAC resistance to drugs in the therapeutic regimen. Despite this, most of the patients experienced clinical improvement (50%). In conclusion, this study highlights a higher prevalence of MAC infections among middle-aged women, with a history of pulmonary tuberculosis treatment and presenting the fibrocavitary radiological form was predominant.

关键词： MACDP Nontuberculous Mycobacteria Mycobacterium avium Lung Disease

Generation of nanomaterials by reactive laser-synthesis in liquid

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Science China(Physics,Mechanics & Astronomy) 2022年第7期65卷 3-47页

作者： Laysa M.Frias batista Ashish Nag Victoria K.Meader Katharine Moore Tibbetts Department of Chemistry Virginia Commonwealth UniversityRichmond VA 23284USA

Nanomaterials with tailored structures and surface chemistry are in high demand, as these materials play increasingly important roles in biology, catalysis, energy storage, and manufacturing. Their heightened demand has attracted attention towards the development of synthesis routes, particularly, laser-synthesis techniques. These efforts drove the refinement of laser ablation in liquid(LAL) and related methods over the past two decades and have led to the emergence of reactive laser-synthesis techniques that exploit these methods’ characteristic, non-equilibrium conditions. Reactive laser-synthesis approaches foster unique chemical reactions that enable the formation of composite products like multimetallic nanoparticles, supported nanostructures, and complex minerals. This review will examine emerging reactive laser-synthesis methods in the context of established methods like *** focus will be on the chemical reactions initiated within the laser plasma, with the goal of understanding how these reactions lead to the formation of unique nanomaterials. We will provide the first systematic review of laser reaction in liquid(LRL) in the literature, and bring a focus to the chemical reaction mechanisms in LAL and reactive-LAL techniques that have not yet been emphasized in reviews. Discussion of the current challenges and future investigative opportunities into reactive laser-synthesis will impart guidance for researchers interested in designing reactive laser-synthesis approaches to novel nanomaterial production.

关键词： laser ablation in liquids laser reduction in liquids nanoparticles

A Data Mining Approach to Detecting Bias and Favoritism in Public Procurement

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Intelligent Automation & Soft Computing 2023年第6期36卷 3501-3516页

作者： Yeferson Torres-Berru Vivian F.Lopez-batista Lorena Conde Zhingre University of Salamanca Salamanca37008Spain Instituto Tecnológico Superior Sudamericano Loja1101608Ecuador Universidad Internacional del Ecuador Loja1101608Ecuador

In a public procurement process,corruption can occur at each stage,favoring a participant with a previous agreement,which can result in over-pricing and purchases of substandard products,as well as gender *** paper’s aim is to detect biased purchases using a Spanish Language corpus,ana-lyzing text from the questions and answers registry platform by applicants in a public procurement process in ***,gender bias is detected,pro-moting both men and women to participate under the same *** order to detect gender bias and favoritism towards certain providers by contracting enti-ties,the study proposes a unique hybrid model that combines Artificial Intelli-gence algorithms and Natural Language Processing(NLP).In the experimental work,303,076 public procurement processes have been analyzed over 10 years(since 2010)with 1,009,739 questions and answers to suppliers and public insti-tutions in each *** bias and favoritism were analyzed using a Word2-vec model with word embedding,as well as sentiment analysis of the questions and answers using the VADER *** 32%of cases(96,984 answers),there was favoritism or gender bias as evidenced by responses from contracting *** proposed model provides accuracy rates of 88% for detecting favor-itism,and 90%for detecting gender *** one-third of the procure-ment processes carried out by the state have indications of corruption and *** Latin America,government corruption is one of the most significant challenges,making the resulting classifier useful for detecting bias and favoritism in public procurement processes.

关键词： Favoritism bias natural language processing Word2vec sentiment analysis word embeddings