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Opportunistic Usage of Maritime VHF Band—Deployment Challenges for a New Regulatory Framework

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Wireless Engineering and Technology 2014年第1期5卷 1-10页

作者： Eduardo Bolas nuno borges de carvalho José Neto Vieira Paulo Mónica de Oliveira Instituto de Telecomunicacoes/DETI Universidade de AveiroAveiroPortugal Naval Research Centre(CINAV)-Escola Naval AlmadaPortugal Instituto de Engenharia Electrónica e Telematica de Aveiro/DETI Universidade de AveiroAveiroPortugal

Similarly to other domains, maritime community requests for broadband services have been significantly increasing. Worldwide navigation footprint and the lack of practical alternatives to Satellite Communications (SATCOM) empower VHF band as the natural choice to support most of those demands. Nevertheless, the major challenge for an implementation of maritime broadband VHF services is unquestionably the spectrum availability and management. Eventually, the solution must include spectrum sharing, using a Cognitive Radio (CR) based approach, but unfortunately current regulatory framework and spectrum management regime are not appropriate for such concepts and emerging technologies. To overcome such constraints, it is necessary to address a whole field of regulatory and standardization issues in order to prepare an evolution towards a more flexible and dynamic approach to spectrum management and a transition that would ensure incumbents live operations and legacy systems. The required paradigm change encompasses a new policy definition, an enforcement mechanism implementation and a comprehensive transition plan. The presented analysis pretends to address the regulatory feasibility of a framework change, discusses its evolving process and points some challenges related with practical aspects associated to Quality of Service (QoS) enforcement metrics definition, centering the arguments in maritime VHF band.

关键词： Maritime Communications Broadband VHF Cognitive Radio Regulatory Framework Dynamic Spectrum Access Metrics

Multi-mechanical waves against Alzheimer’s disease pathology:a systematic review

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Translational Neurodegeneration 2021年第3期10卷 459-486页

作者： Francisca Monteiro Ioannis Sotiropoulos Óscar carvalho nuno Sousa Filipe S.Silva Center for Microelectromechanical Systems(CMEMS) University of MinhoCampus Azurém4800-058 GuimarãesPortugal Life and Health Sciences Research Institute(ICVS) Medical SchoolUniversity of MinhoCampus Gualtar4710-057 BragaPortugal ICVS/3B’s-PT Government Associate Laboratory Braga/GuimarãesPortugal Institute of Biosciences&Applications NCSR“Demokritos” AthensGreece

Alzheimer’s disease(AD)is the most common cause of dementia,afecting approximately 40 million people *** inefectiveness of the available pharmacological treatments against AD has fostered researchers to focus on alternative strategies to overcome this *** vibrations delivered in diferent stimulation modes have been associated with marked improvements in cognitive and physical performance in both demented and nondemented *** of the mechanical-based stimulation modalities in eforts are earlier whole-body vibration,transcranial ultrasound stimulation with microbubble injection,and more recently,auditory ***,there is a huge variety of treatment specifcations,and in many cases,conficting results are *** this review,a search on Scopus,PubMed,and Web of Science databases was performed,resulting in 37 *** studies suggest that mechanical vibrations delivered through diferent stimulation modes are efective in attenuating many parameters of AD pathology including functional connectivity and neuronal circuit integrity defcits in the brains of AD patients,as well as in subjects with cognitive decline and non-demented older *** the evolving preclinical and clinical evidence on these therapeutic modalities,their translation into clinical practice is not consolidated ***,this comprehensive and critical systematic review aims to address the most important gaps in the reviewed protocols and propose optimal regimens for future clinical application.

关键词： Alzheimer’s disease Auditory stimulation Mechanical vibrations Ultrasounds Whole-body vibration

Low-grade mucinous appendiceal neoplasm mimicking an ovarian lesion: A case report and review of literature

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World Journal of Clinical Cases 2021年第10期9卷 2334-2343页

作者： André Luís borges Catarina Reis-de-carvalho Martinha Chorão Helena Pereira Dusan Djokovic Department of Obstetrics and Gynecology Hospital de São Francisco Xavier-Centro Hospitalar Lisboa OcidentalLisbon 1449-005Portugal Faculdade de Ciências da Saúde Universidade da Beira InteriorCovilhã6201-001Portugal Department of Obstetrics Gynecology and Reproductive MedicineHospital de Santa Maria-Centro Hospitalar Universitário Lisboa NorteLisbon 1649-028Portugal Department of Pathology Hospital Egas MonizCentro Hospitalar Lisboa OcidentalLisbon 1349-019Portugal Department of Obstetrics and Gynecology Maternidade Dr.Alfredo da Costa-Centro Hospitalar Universitário de Lisboa CentralLisbon 2890-495Portugal Faculdade de Ciências Médicas Nova Medical SchoolLisbon 1169-056Portugal

BACKGROUND Appendiceal tumors are rare lesions that may not be easily differentiated from primary ovarian lesions preoperatively,despite the use of advanced diagnostic methods by experienced *** SUMMARY A 59-year-old G2P2 woman,with chronic pelvic pain,underwent a pelvic ultrasound that revealed an adnexal mass measuring 58 mm×34 mm×36 mm,with irregular borders,heterogeneous echogenicity,no color Doppler vascularization and without acoustic *** ovarian tissue was visualized in contact with the lesion,and it was impossible to separate the lesion from the ovary by applying pressure with the ultrasound ***,peritoneal metastases or other alterations were not *** the international ovarian tumor analysis ADNEX model,the lesion was classified as a malignant tumor(the risk of malignancy was 27.1%,corresponding to Ovarian-Adnexal Reporting Data System category 4).Magnetic resonance imaging confirmed the presence of a right adnexal mass,apparently an ovarian tumor measuring 65 mm×35 mm,without signs of invasive or metastatic *** explorative laparotomy,normal morphology of the internal reproductive organs was noted.A solid mobile lesion involved the entire *** was *** of the abdominal cavity revealed no signs of malignant ***,the appendiceal lesion corresponded to a completely resected low-grade mucinous appendiceal neoplasm(LAMN).CONCLUSION The appropriate treatment and team of specialists who should provide health care to patients with seemingly adnexal lesions depend on the nature(benign vs malignant)and origin(gynecological vs nongynecological)of the ***,gynecologists and other pelvic surgeons should be familiar with the imaging signs of LAMN whose clinical presentation is silent or *** assistance of a consultant specializing in intestinal tumors is important support that gynecological surgeons can receive during the operation

关键词： Adnexal mass Appendiceal neoplasm Diagnostic imaging Pelvic neoplasm Adnexal diseases Pelvic neoplasm Case report

Formation of DNA Strand Breaks in Peripheral Lymphocytes of Rats After Exposure to Natural Sunlight

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Biomedical and Environmental Sciences 2012年第2期25卷 245-249页

作者： Dorival Mendes RODRIGUES-JUNIOR Ana Amélia de carvalho MELO Benedito borges da SILVA Pedro Vitor LOPES-COSTA Department of Biology Federal University of Piaui-TeresinaPiauiBrazil Department of Gynecology Federal University of Piaui-TeresinaPiauiBrazil

Objective This paper aims to evaluate the genotoxicity in peripheral blood lymphocytes of rats after exposure to sunlight at different time points of day in a tropical region of Brazil（5oS,42oW）.Materials and Methods Thirty Wistar-Hannover rats,three months old,were randomly divided into three groups of 10 animals each：Group I [control,without exposure to ultraviolet（UV） radiation],Group II（exposed to sunlight during 08：00 *** 10：00 a.m.）,and Group III（exposed to sunlight during 10：00 *** 12：00 a.m.）.After a week of exposure,peripheral blood samples were taken from the tail of these animals to prepare smears on two slides per *** 24 h after exposure to sunlight in Group III,a new collection was obtained to observe the repair *** alkaline comet assay was used in this study to evaluate the genotoxic activity of sunlight（P0.05）.Results There was no statistical difference between Group I and II（P=0.672）.On the other hand,the exposure to sunlight in Group III showed genotoxic action in comparison to the other groups（P0.0001）.Also,there was no significant repair in Group III R（P=0.407）.Conclusion This study has shown a genotoxic potential of sunlight（UVA-B） in lymphocytes of mammals from 10：00 *** 12：00 a.m.,due to a higher intensity of UV in this tropical region.

关键词： Comet assay DNA damage Rats Sunlight Ultraviolet radiation

Lymphocyte subsets in alcoholic liver disease

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World Journal of Hepatology 2013年第2期5卷 46-55页

作者： Luís Costa Matos Paulo Batista nuno Monteiro Joo Ribeiro Maria A Cipriano Pedro Henriques Fernando Giro Armando carvalho Faculty of Medicine of the University of Coimbra 3004-504 CoimbraPortugal Centro Hospitalar Tondela Viseu E.P.E3504-509 ViseuPortugal Department of Anatomopathology University of Coimbra Hospital3004-504 CoimbraPortugal

AIM:To compare lymphocyte subsets between healthy controls and alcoholics with liver ***:The patient cohort for this study included individuals who were suspected to have alcoholic liver disease(ALD) and who had undergone liver biopsy(for disease grading and staging,doubts about diagnosis,or concurrent liver disease;n = 56).Normal controls included patients who were admitted for elective cholecystectomy due to non-complicated gallstones(n = 27).Formalin-fixed,paraffin-embedded liver biopsy specimens were sectioned and stained with hematoxylin and eosin and Perls' Prussian *** non-alcoholic steatohepatitis score was used to assess markers of *** population subsets were determined by flow cytometry.T lymphocytes were identified(CD3+),and then further subdivided into CD4+ or CD8+ populations.B lymphocytes(CD19+) and natural killer(NK) cell numbers were also *** addition to assessing lymphocyte subpopulation differences between ALD patients and controls,we also compared subsets of alcoholic patients without cirrhosis or abstinent cirrhotic patients to normal ***:The patient cohort primarily consisted of older *** alcoholism was present in 66.1%.Reported average daily alcohol intake was 164.9 g and the average lifetime cumulative intake was 2211.6 *** was present in 39.3% of the patients and 66.1% had significant fibrosis(perisinusoidal and portal/periportal fibrosis,bridging fibrosis,or cirrhosis) in their liver *** average Mayo end-stage liver disease score was *** hereditary hemochromatosis genotypes were *** patients(n = 56) presented with significant lymphopenia(1.5 × 109/L ± 0.5 × 109/L vs 2.1 × 109/L ± 0.5 × 109/L,P < 0.0001),due to a decrease in all lymphocyte subpopulations,except for NK lymphocytes:CD3+(1013.0 ± 406.2/mm3 vs 1523.0 ± 364.6/mm3,P < 0.0001),CD4+(713.5 ± 284.7/mm3 vs 992.4 ± 274.7/mm3,P < 0.0001),CD8+(262.3 ± 140.4/mm3 vs 478.9 ± 164.6/mm3,P < 0.0001),and CD19+(120.6

关键词： Lymphocyte subsets Flow cytometry Alcoholism Alcoholic liver disease Liver fibrosis Liver biopsy HFE gene

Vulvar Rejuvenation Using High-Intensity Focused Ultrasound (HIFU): Fundamentals and Technique

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Journal of Biosciences and Medicines 2022年第12期10卷 239-252页

作者： Fábio dos Santos borges Mylana Almeida de carvalho Carla Barreto Silva de Cerqueira Tais Andrade Cravo Monteiro Isabelle Maria Almeida e Benevides Adriele Machado Dantas Thiago Gusmão da Silva Carolina Barreto Ribeiro Martins dos Santos Estácio de Sá University Rio de Janeiro Brazil IDE Faculty—Institute for Educational Development Salvador Brazil Longevitat Clinic—Advanced Aesthetics Salvador Brazi FAINOR Independent College of the Northeast Vitória da Conquista Brazil UFBA Federal University of Bahia Salvador Brazil

Background: The unaesthetic appearance of the female intimate area (vulva, “mound of venus” and perianal region) is a triggering factor of negative psychological responses, embarrassment, anxiety and insecurity in many women. Using rejuvenating equipment for vaginal structure or for the intimate area as a whole is already widespread in the literature, and High-Intensity Focused Ultrasound (HIFU) has proven to be very effective in the clinical practice of many professionals. This study, therefore, aims to describe the fundamentals and applicability that guide the use of HIFU in vulvar rejuvenation. Materials and Methods: Exploratory research was carried out, presented in a narrative review, to highlight the action of HIFU in female intimate rejuvenation. The review explored scientific articles published and available in the following databases: MEDLINE (Medical Literature Analysis and Retrieval System Online), PubMed (National Library of Medicine), SCIELO (Scientific Electronic Library Online), and LILACS (Latin Literature American and the Caribbean in Health Sciences). In addition, some clinical findings obtained through a retrospective analysis of medical records were added to describe the authors’ clinical experience in the use of Focused Ultrasound (HIFU) for vulvar rejuvenation. Results: We verified that the tissues of female external genitalia respond very well to the stimuli of the focused sound waves of the HIFU, being able to produce immediate and lasting results through isolated applications or in association with intradermotherapy or other therapeutic resources. Conclusion: We conclude that using High Intensity Focused Ultrasound aimed at vulvar rejuvenation is safely indicated and assures excellent aesthetic results at the end of the treatment because similarly to other treatment techniques, the thermal stimuli of HIFU are also able to produce an excellent therapeutic response in the dermal tissue of the female intimate area, promoting intense neocollagen

关键词： Intimate Aesthetics Vulvar Rejuvenation Vaginal Rejuvenation HIFU Focused Ultrasound Micro Focused Ultrasound and Cosmetic Gynecology

Estimating Emission of Leaves Seedlings Forest in Different Shading Levels, at Conditions of Transition Amazon-Cerrado, Brazil

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American Journal of Plant Sciences 2014年第15期5卷 2330-2341页

作者： Emanoeli borges Monteiro Cátia Cardoso da Silva Andréa carvalho da Silva Adilson Pacheco de Souza Institute of Agricultural and Environmental Sciences Federal University of Mato Grosso Sinop Brazil

This study determined the thermal requirements of forest native seedlings (Hymenolobium petraeum and Parkia pendula) and exotic seedlings (Adenanthera pavonina and Cassia fistula) all belonging to Fabaceae family, in three shading conditions (full sun, 50% and 65% of global radiation attenuation by poliefinas black screens). Also they were estimated of leaf emergence by Phyllochron and the Wang and Engel models, on climatological conditions at Sinop (Region of Transition Amazon-Cerrado), Mato Grosso State, Brazil, for winter period (between June and August of 2012). The minimum (Tb) and maximum (TB) basal temperatures and the optimum temperature (Topt) of growth of each species were estimated by regressions between relative growth rates and minimum, maximum and average temperatures, respectively. The values of the estimated Tb were 15.0°C, 16.4°C, 14.5°C and 14.6°C;to TB were 39.7°C, 37.1°C, 38.6°C and 40.1°C;and to Topt were 24.4°C, 24.9°C, 24.9°C and 25.1°C to A. pavonina, C. fistula, H. petraeum and P. pendula, respectively. The Phyllochron model showed highest efficiency in the estimation of leaf appearance when compared to Wang and Engel method.

关键词： Vegetative Growth Thermal Sum Degree-Days Statistical Indicatives

Anal canal gastrointestinal stromal tumors:Case report and literature review

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World Journal of Gastroenterology 2014年第1期20卷 319-322页

作者： nuno carvalho Diogo Albergaria Rui Lebre Joo Giria Vitor Fernandes Helena Vidal Maria José Brito Department of General Surgery Garcia de Orta Hospital2801-951 AlmadaPortugal Department of Gastroenterology Garcia de Orta Hospital2801-951 AlmadaPortugal Department of Radiology Garcia de Orta Hospital2801-951 AlmadaPortugal Department of Pathology Garcia de Orta Hospital2801-951 AlmadaPortugal

Gastrointestinal stromal tumors(GIST)are an uncommon group of tumors of mesenchymal *** of the anal canal is extremely *** present,only 10cases of c-kit positive anal GIST have been reported in the *** is no widely accepted treatment approach for this *** is sparse on imaging evaluation of anal canal GIST,usually described as a lesion in the intersphincteric *** describe the case of a 73-year-old man with a mass in the anal canal,and no other *** ultrasound and magnetic resonance imaging showed a well circumscribed solid nodule in the intersphincteric *** patient was treated by local *** pathological examination showed a 7 cm×3.5 cm×3cm mass,and histological examination showed a proliferation of spindle cells,with prominent nuclear *** mitotic count was of 12 mitoses/50 *** tumor was positive for KIT protein,CD34 and vimentin in the majority of cells,and negative for desmin and S100.A diagnosis of GIST,with high risk aggressive behavior was *** abdomino-perineal resection was discussed,but *** follow-up included clinical evaluation and anal *** 5 years the patient is well,with maintained continence and no evidence of local recurrence.

关键词： Gastrointestinal stromal tumors Anal canal Endoana

Recovering Wood Waste to Produce Briquettes Enriched with Commercial Kraft Lignin

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Natural Resources 2021年第5期12卷 181-195页

作者： Carlos Eduardo Silveira da Silva Fernando José borges Gomes Larisse Aparecida Ribas Batalha Roberto Carlos Costa Lelis Ana Márcia Macedo Ladeira carvalho Angélica de Cássia Oliveira Carneiro Alexandre Monteiro de carvalho Federal Rural University of Rio de Janeiro Forest Products Department Rio de Janeiro Brazil Federal University of Viç osa Forest Engineer Department Vi&#231 osa Minas Gerais Brazil

Aiming to use lignocellulosic biomass as energy source, one of the process that may aggregate values is the densification process, which allows the production of bioenergy using solid fuels, mainly for reducing transportation costs. In this research, solid fuel from co-briquetting of wood residues from sawmill using commercial kraft lignin as binder was investigated. The effects of compression pressure (900, 1200 and 1500 PSI) and briquette formulation (varying wood and kraft lignin proportion) on the quality and characteristics of briquettes were evaluated. The main findings were that briquetting of wood residues with kraft lignin resulted in an improvement of bulk density, strength rupture modulus, low heating value (LHV) and high heating value (HHV). The briquettes using 4% and 6% of kraft lignin, and submitted to 1200 to 1500 PSI, presented higher bulk density and strength resistance, respectively. On the other hand, the heating values showed the highest results with the addition of 2% lignin at 900 PSI, being the legal range for additives in briquettes for many countries such as in European Union.

关键词： Hardwood Biomass Densification Heating Values Solid Fuel