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Wind-farm and hydrogen-storage co-location system optimization for dynamic frequency response in the UK

Clean Energy 2023年第1期7卷 157-173页

作者： Fulin Fan Shanay Skellern david campos-gaona John Nwobu Department of Electronic and Electrical Engineering University of StrathclydeGlasgowUK 2Offshore Renewable Energy CatapultGlasgowUK

The continuous development of hydrogen-electrolyser and fuel-cell technologies not only reduces their investment and operating costs but also improves their technical performance to meet fast-acting requirements of electrical grid balancing services such as frequency-response *** order to project the feasibility of co-locating a hydrogen-storage system with a wind farm for the dynamic regulation frequency-response provision in Great Britain,this paper develops a modelling framework to coordinate the wind export and frequency responses to the main grid and manage the interaction of the electrolyser,compressor,storage tank and fuel cell within the hydrogen-storage system by respecting the market mechanisms and the balance and conversion of power and hydrogen *** the revenue of frequency-response service provision and a variety of costs induced by the hydrogen-storage system are translated into the net profit of the co-location system,which is maximized by optimizing the capacities of hydrogen-storage-system components,hydrogen-storage levels that guide the hydrogen restoration via operational baselines and the power interchange between a wind-farm and hydrogen-storage system,as well as the capacities tendered for low-and high-frequency dynamic regulation *** developed modelling framework is tested based on a particular 432-MW offshore wind farm in Great Britain combined with the techno-economics of electrolysers and fuel cells projected for 2030 and 2050 *** optimized system configuration and operation are compared between different operating scenarios and discussed alongside the prospect of applying hydrogen-storage systems for frequency-response provision.

关键词： dynamic regulation frequency response hydrogen-storage system techno-economic optimization UK perspective wind farm

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Targeting muscle to treat Charcot-Marie-Tooth disease

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Neural Regeneration Research 2024年第8期19卷 1653-1654页

作者： david Villarroel-campos James N.Sleigh Department of Neuromuscular Diseases and UCL Queen Square Motor Neuron Disease Centre UCL Queen Square Institute of NeurologyUniversity College LondonLondonUK UK Dementia Research Institute University College LondonLondonUK

Charcot-Marie-Tooth disease(CMT)is a hereditary peripheral neuropathy causing muscle weakness/wasting and sensory dysfunction predominantly in limb *** patients display gait abnormalities,foot deformities,loss of sens... 详细信息

关键词： Marie sensation neuropathy

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Glacier reconstruction of La Covacha Massif in Sierra de Gredos(central Spain) during the Last Glacial Maximum

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Journal of Mountain Science 2019年第6期16卷 1336-1352页

作者： Néstor campos david PALACIOS Luis M.TANARRO Department of Geography Complutense University of Madrid

A paleoglacier reconstruction during the Last Glacial Maximum(LGM) is presented for a high mountain area of La Covacha massif in Sierra de Gredos(Iberian Central System) in central Spain. The moraines that, according with the previous literature, had formed during the global LGM, were mapped through photo interpretation of digital aerial photographs and 3D images and detailed field surveys. The topography of the paleoglaciers was estimated using a simple steady-state model that assumed a perfectly plastic ice rheology, reconstructing the theoretical ice profiles and obtaining the ice thickness of the glaciers during the LGM. The reconstruction of the glaciers was carried out using automated and semi-automated physically-based models, obtaining more realistic results with semi-automated models. According to our study, the paleoglaciers in the study area covered an area of 34.79 km^2 during the global LGM, with a maximum ice thickness of 366 meters in La Vega gorge, a total volume of 34.25 × 108 m^3 and a mean paleoELA of 1932 meters. Most of the ice(~82%) was in paleoglaciers facing north, and the rest was in paleoglaciers with other orientations. This emphasizes the importance of orientation in relation to glacier dynamics and ice accumulation. The results obtained in the calculation of paleoELAs during the global LGM in Gredos are average compared to the Iberian mountains of the Northwest where the values were much lower, and with respect to those of the Southwest, much higher. This demonstrates the importance of the exposure of Mediterranean mountains to the humidity sources coming from the NW during the global LGM, as is the case at present.

关键词： Glacier reconstruction Paleoglacier Ice thickness Equilibrium line altitude Iberian Central System

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FeedEfficiencyService: An architecture for the comparison of data from multiple studies related to dairy cattle feed efficiency indices

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Information Processing in Agriculture 2022年第3期9卷 378-396页

作者： Heitor Magaldi Linhares Regina Braga Wagner Antonio Arbex Mariana Magalhaes campos Fernanda campos Jose Maria N.david Victor Stroele Programa de Pos-Graduacao em Ciencia da Computacao Universidade Federal de Juiz de ForaCampus UniversitarioRua JoseLourenco Kelmers/n-Sao PedroJuiz de ForaMinas Gerais 36036-900Brasil Brazilian Agricultural Research Corporation-Embrapa Av.Eugenio do Nascimento610-AeroportoJuiz de Fora-MGMinas Gerais 36038-330Brasil

The increased demand for food worldwide,the reduced land availability for livestock pro-duction,the increasing cost of animal feed and the need for mitigating livestock-related greenhouse gas emissions have driven the search for animal feeding systems that proves more *** tackle this problem,we propose the use of computational support to help researchers compare data on feed efficiency,therefore improving economic and environ-mental *** a solution,we present an integrative architecture capable of combining heterogeneous data from multiple experiments related to dairy cattle feed efficiency *** proposed architecture,called FeedEfficiencyService,classifies animals according to feed efficiency indices and allows visualizations through ontologies and inference *** results obtained from a case study with researchers from the Brazilian Agri-cultural Research Corporation–Dairy Cattle(EMBRAPA)demonstrate that this architecture is a supporting tool in their daily work *** researchers highlighted the importance of the proposed architecture as it allows analyzing animal data,comparing experiments,having reliable data analyses,and standardizing and organizing data from *** novelty of our approach is the use of ontologies and inference engines to enable the discovery of new knowledge and new relationships between data from feed efficiency-related *** store such data,relationships,and analyses of results in an inte-grated *** solution ensures unified access to the processing history and data from diverse experiments,including those conducted at external research centers.

关键词： Dairy Cattle

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Litter decomposition and nutrient release for two tropical N-fixing species in Rio de Janeiro,Brazil

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Journal of Forestry Research 2022年第2期33卷 487-496页

作者： david Pessanha Siqueira Giovanna campos Mamede Weiss de Carvalho JoséGabriel de Souza Silva Marcos Vinicius Winckler Caldeira Deborah Guerra Barroso Laboratório de Fitotecnia Universidade Estadual do Norte Fluminense Darcy RibeiroAvenida Alberto Lamego2000Campos dos GoytacazesRio de JaneiroBrazil Departamento de Ciências Florestais e da Madeira Universidade Federal do Espírito SantoAvenida Governador Lindenberg316Jerônimo MonteiroEspírito SantoBrazil Department of Geosciences and Natural Resources Management University of CopenhagenRolighedsvej 23Frederisksberg CDenmark

Litter production and decomposition are critical to forest productivity,nutrient cycling,and carbon seques-tration in tropical woody ***,nutrient release and leaf litter stoichiometry in tropical legume tree plantations over the long term after outplanting are poorly understood or even *** improving our under-standing of the pattern of changes in the decomposition of N-fixing leaf litters and their possible impact on carbon stor-age,we measured litter production,mass loss and nutrient release for 240 d during litter decomposition for two tropical legume tree species(Plathymenia reticulata and Hymenaea courbaril),in Rio de Janeiro,*** production for *** was 5.689 kg ha^(−1) a^(−1) and 3.231 kg ha^(−1) a^(−1) for *** patterns of mass loss rates were similar;however,nutrient release was greater for ***,while *** showed immobilization of nutrients,especially for N,which increased by almost 20%in the early phase of decomposition followed by gradual *** from the N-fixing species did differ in nutrient chemistries over time,which was not surprising given that initial nutrient concentrations varied broadly,except for C and *** of the nutrient concentrations increased as the remaining litter mass decreased in both species,except for C and *** C:N and N:P ratios differed between the species,but N:P did not correlate to mass *** species had N-rich leaves,but *** decomposition was very likely P-limited,while *** seemed to be co-limited by N and *** results showed different patterns in nutrient release and the stoichi-ometry involved in the decomposition dynamics of the two tropical N-fixing species,even though they have similar litter decay *** species,but especially ***,may help re-establish nutrient cycling in disturbed ecosystems.

关键词： Nutrient dynamics Legume species Litter chemistry Ecological stoichiometry Tropical forest

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Vegetative propagation of Apuleia leiocarpa(Vogel)***

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Journal of Forestry Research 2022年第2期33卷 455-462页

作者： JoséGabriel de Souza Silva Diêgo Faustolo Alves Bispo david Pessanha Siqueira Giovanna campos Mamede Weiss de Carvalho Deborah Guerra Barroso Laboratório de Fitotecnia Universidade Estadual do Norte Fluminense Darcy RibeiroAvenida Alberto LamegoCampos dos GoytacazesRJ 2000Brazil

Apuleia leiocarpa is an environmentally and economically significant Atlantic Forest species threat-ened by ongoing *** vegetative propagation of the species could be a step forward to enable implanta-tion of clonal seed orchards and multiplication of selected trees but remains unknown to *** study assessed the mini-cutting technique for propagation of *** and determined the time required for rooting and viable mini-cutting type and *** results show that it is possible to propagate *** with mini-cuttings derived from mini-stumps produced with seeds;the mini-stumps pre-sented regrowth capacity and remained constantly produc-tive for 1 year;10-cm *** mini-cuttings should remain under misting conditions for at least 40 days,and the vegetative propagation of *** with intermediate 7-to 10-cm mini-cuttings resulted in more vigorous clonal seedlings than smaller mini-cuttings.

关键词： Mini-cutting Tropical woody species Adventitious rooting Fabaceae

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The challenge of hepatic vein reconstruction in surgical oncology

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Hepatobiliary Surgery and Nutrition 2022年第3期11卷 473-476页

作者： Víctor Lopez-Lopez david Ferreras Dilmurodjon Eshmuminov Roberto Brusadin Ricardo Robles-campos Department of General Visceral and Transplantation SurgeryClinic and University Hospital Virgen de La ArrixacaIMIB-ARRIXACAEl PalmarMurciaSpain Department of Surgery and Transplantation Swiss Hepato-Pancreato-Biliary(HPB)CenterUniversity Hospital ZurichZurichSwitzerland

In the liver surgical oncology,a complete resection of the primary or metastatic liver tumors remains the main *** the tumor invades the hepatic vein or the inferior vena cava(IVC)a curative resection becomes ***,recent advances in intraoperative hemodynamic management together with the refinement of the surgical technique acquired by complex liver surgery and transplantation have allowed to perform hepatic vein or vena cava resection for curation with low morbidity and mortality.

关键词： surgical hepatic mortality

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Breaking paradigms: Long non-coding RNAs forming gene fusions with potential implications in cancer

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Genes & Diseases 2024年第3期11卷 311-323页

作者： david Sanchez-Marin Macrina Beatriz Silva-Cazares Fany Iris Porras-Reyes Rebeca Garcia-Roman Alma D.campos-Parra Posgrado en Ciencias Biologicas Facultad de MedicinaUniversidad Nacional Autonoma de MexicoCiudad de MexicoC.P.04360Mexico Unidad Academica Multidisciplinaria Region Altiplano Universidad Autonoma de San Luis Potost(UASLP)Carretera a Cedral Km 5+600Ejido San Jose de la TrojesMatehualaSan Luis PotosiC.P.78760Mexico Servicio de Anatomia Patologica Instituto Nacional de Cancerologia(INCan)Nino JesuisTlalpanCiudaddeMexicoC.P.14080Mexico Instituto de Salud Publica Universidad Veracruzana(UV)Av.Dr LuisDr.Castelazo Ayala s/nCol.Industrial AnimasXalapaVeracruzC.P.91190Mexico

Long non-coding RNAs(lncRNAs)are non-coding RNAs longer than 200 nucleotides with dynamic regulatory *** interact with a wide range of molecules such as DNA,RNA,and proteins to modulate diverse cellular functions through several mechanisms and,if deregulated,they can lead to cancer development and ***,it has been described that IncRNAs are susceptible to form gene fusions with mRNAs or other IncRNAs,breaking the paradigm of gene fusions consisting mainly of protein-coding ***,their biological significance in the tumor phenotype is still ***,their recent identification opens a new line of research to study their biological role in tumor-igenesis,and their potential as biomarkers with clinical relevance or as therapeutic *** present study aimed to review the IncRNA fusions identified so far and to know which of them have been associated with a potential *** address the current challenges to deepen their study as well as the reasons why they represent a future therapeutic window incancer.

关键词： Cancer Genefusions IncRNAs ncRNAs Therapy

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Tandem cervical carotid stenting for stenosis with flow diversion embolisation for the treatment of intracranial aneurysms

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Stroke & Vascular Neurology 2019年第1期4卷 43-47页

作者： Jessica K campos Li-Mei Lin Narlin B Beaty Matthew T Bender Bowen Jiang david A Zarrin Alexander L Coon Department of Neurosurgery Johns Hopkins University School of MedicineBaltimoreMarylandUSA Department of Neurosurgery University of CaliforniaIrvineOrangeCaliforniaUSA

Background An estimated 2%-3%of the population harbour an intracranial *** atherosclerotic cervical carotid disease is not *** management of these two entities remains a challenge within the *** presentation We report a single case of concomitant carotid stenosis and two ipsilateral unruptured intracranial aneurysms treated with a single-staged cervical carotid stenting and cerebral aneurysm embolisation with the Pipeline embolisation *** No consensus currently exists to guide endovascular treatment of intracranial aneurysms associated with asymptomatic ipsilateral ***,we present a case of asymptomatic moderate carotid stenosis with two ipsilateral intracranial aneurysms and suggest carotid artery stenting takes procedural priority over aneurysm embolisation in single-stage *** rationale for the sequence of neurointerventions is based on the tracking a robust distal access system beyond a stenotic proximal carotid lesion and stabilisation of the ulcerated plaque to avoid thromboembolic complications associated with plaque irritation during aneurysm *** cases and longer follow-up will be needed to further assess the efficacy of this technique.

关键词： aneurysm carotid stenosis

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Advances in endovascular aneurysm management: flow modulation techniques with braided mesh devices

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Stroke & Vascular Neurology 2020年第1期5卷 1-13页

作者： Jessica K campos Barry Cheaney II Brian V Lien david A Zarrin Chau D Vo Geoffrey P Colby Li-Mei Lin Alexander L Coon Department of Neurosurgery University of California Irvine School of MedicineOrangeCaliforniaUSA Oregon Health and Science University School of Medicine PortlandOregonUSA Neurosurgery Johns Hopkins UniversityBaltimoreMarylandUSA Johns Hopkins University School of Medicine BaltimoreMarylandUSA UCLA Neurosurgery Ronald Reagan UCLA Medical CenterLos AngelesCaliforniaUSA Carondelet Neurological Institute St.Joseph's HospitalCarondelet Health NetworkTucsonArizonaUnited States

Flow diverters and flow disruption technology,alongside nuanced endovascular techniques,have ushered in a new era of treating cerebral ***,we provide an overview of the latest flow modulation devices and highlight the... 详细信息

关键词： flow braided hered

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