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Zinc-ion hybrid supercapacitors with ultrahigh areal and gravimetric energy densities and long cycling life

Journal of Energy Chemistry 2022年第7期31卷 480-491,I0012页

作者： Ahmad Amiri M.Naraghi andreas A.Polycarpou J.Mike walker’66 mechanical engineering department texas a&m universitycollege stationTX 77843USA department of aerospace engineering texas a&m universitycollege stationTX 77843USA

Zinc ion hybrid supercapacitor (ZIHSC) with promising energy and power densities is an excellent answer to the ever-growing demand for energy storage *** restricted lifespan due to the dendrite formation on metallic zinc (Zn) is one of the main ***,we investigate the electrochemical capability of oxygen-enriched porous carbon nanofibers (A-CNF) and nitrogen,oxygen-enriched porous carbon nanofibers (N-CNF) cathode materials for structural *** this end,a series of samples with different chemical compositions (N and O contents) are prepared to present deep insight into the electrochemical mechanism between N/O doping and Zn-ion *** as-prepared ZIHSC in the presence of N-CNF cathode and Zn Cl_(2) electrolyte offers a battery-level gravimetric energy density of 143.2 Wh kg^(-1)at a power density of 367.1 W kg^(-1).The free-standing N-CNF electrodes in ZIHSCs enjoy delivering an outstanding areal energy density of 110.4μWh cm^(-2)at 0.24 m W cm^(-2),excellent rate capability,and noticeable cycling stability over 10,000 cycles at 10 A g^(-1)with less than 7%*** was also concluded that active pyrrolic N dopants might deliver and facilitate more pseudocapacitance in ZIHSCs than other N configurations,resulting in higher adsorption/desorption and insertion/extraction process of Zn Cl^(+).Taking advantage of the beneficial properties of a free-standing continuous cathode,this novel generation of structural cathode material offers high areal and gravimetric energy densities and mechanical properties in a single zinc-ion-based package.

关键词： Porous carbon nanofibers Zinc chloride electrolyte Zinc ion hybrid supercapacitors Nitrogen-doping Activation Energy density

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Estimating total nitrogen deposition in agroecosystems in northern China during the wheat cropping season

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Journal of Arid Land 2010年第1期2卷 2-8页

作者： Christie PETER Fangmeier andreas College of Resources and Environmental Sciences China Agricultural University Agri-Environment Branch Agri-Food and Biosciences Institute Institute of Plant Ecology and Landscape University of Hohenheim

Atmospheric nitrogen (N) deposition has been poorly documented in northern China, an intensive agricultural and industrial region with large emissions of NHx and NOy. To quantify N deposition, total airborne N deposition was determined at three agricultural sites using a manual integrated total nitrogen input (ITNI) system during growth of winter wheat (Triticum aestivum L.) and Italian ryegrass (Lolium multiflorum Lam.) from September 2005 to May 2006. Total estimated N deposition averaged 54.9 and 43.2 kg N/hm2 across the three sites when wheat was grown to flowering and maturing, respectively. The average value was 50.2 kg N/hm2 when ryegrass was the indicator plant. Both indicator species gave similar total airborne N input results. The intermediate level of N supplied resulted in the highest N deposition, and the ratio of N acquired from deposition to total N content of the whole system decreased with increasing N supply to the roots. The contribution of atmospheric N to the total N content of the wheat and ryegrass sand culture systems ranged from 10% to 24%.

关键词： airborne nitrogen inputs 15N pool dilution method sand culture system biological indicators

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Laparoscopic resection of gastrointestinal neuroendocrine tumors with special contribution of radionuclide imaging

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World Journal of Gastroenterology 2014年第42期20卷 15608-15615页

作者： andreas Shamiyeh Michael Gabriel Ludwig Boltzmann Institute for Operative Laparoscopy and 2nd Surgical Department Linz General Hospital Department of Nuclear Medicine and Endocrinology Linz General Hospital University Clinic of Nuclear Medicine Medical University of Innsbruck

The surgical treatment of neuroendocrine tumors(NETs) draws on experience and guidelines more than on prospective randomized trials. The incidence of NET is increasing in all parts of the gastrointestinal tract. A variety of classifications introduced over the last decade may have led to difficulties in judging clinical relevance and determining the right surgical strategy. The North American Neuroendocrine Tumor Society and the European Neuroendocrine Tumor Society have developed usable guidelines from the available literature. For more than 20 years laparoscopy has developed as the gold standard for various surgical indications. Nevertheless, few trials have compared open and laparoscopic surgery with regard to NET. This review summarizes the recent literature on surgery for NET and incorporates the evidence on laparoscopy for cancer which might be also applied for NET.

关键词： Neuroendocrine tumors Gastrointestinal Laparoscopy Image-guided surgery Somatostatin receptor imaging

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USING THE ANALYTICAL HIERARCHY PROCESS TO SUPPORT SUSTAINABLE USE OF GEO-RESOURCES IN METROPOLITAN AREAS

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Journal of Systems Science and Systems Engineering 2006年第2期15卷 154-164页

作者： Oswald MARINONI andreas HOPPE Technische Universitt Darmstadt Institute for Applied GeosciencesGermany

Sand and gravel are important raw materials which are needed for many civil engineering projects. Due to economic reasons, sand and gravel pits are frequently located in the periphery of metropolitan areas which are often subject to competing land-use interests. As a contribution to land-use conflict solving, the Analytic Hierarchy Process （AHP） is applied within a Geographic Information System （GIS） environment. Two AHP preference matrix scenario constellations are evaluated and their results are used to create a land-use conflict map.

关键词： AHE land-use conflict map geo-resources GIS Germany Hesse

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Optimal Offering of Energy Storage in UK Day-Ahead Energy and Frequency Response Markets

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 415-426页

作者： Makedon Karasavvidis andreas Stratis Dimitrios Papadaskalopoulos Goran Strbac Department of Electrical and Electronic Engineering Imperial College LondonLondonUK Statkraft UK Ltd. LondonUK Department of Electrical and Computer Engineering University of PatrasPatrasGreece IEEE

The offering strategy of energy storage in energy and frequency response(FR) markets needs to account for country-specific market regulations around FR products as well as FR utilization factors, which are highly uncertain. To this end, a novel optimal offering model is proposed for stand-alone price-taking storage participants, which accounts for recent FR market design developments in the UK, namely the trade of FR products in time blocks, and the mutual exclusivity among the multiple FR products. The model consists of a day-ahead stage, devising optimal offers under uncertainty, and a real-time stage, representing the storage operation after uncertainty is materialized. Furthermore, a concrete methodological framework is developed for comparing different approaches around the anticipation of uncertain FR utilization factors(deterministic one based on expected values, deterministic one based on worst-case values, stochastic one, and robust one), by providing four alternative formulations for the real-time stage of the proposed offering model, and carrying out an out-of-sample validation of the four model instances. Finally, case studies employing real data from UK energy and FR markets compare these four instances against achieved profits, FR delivery violations, and computational scalability.

关键词： Energy markets energy storage frequency response optimal offering robust optimization stochastic programming

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Spectral Element Discretization of the Stokes Equations in Deformed Axisymmetric Geometries

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Advances in Applied Mathematics and Mechanics 2011年第4期3卷 448-469页

作者： Zakaria Belhachmi andreas Karageorghis Laboratoire de Mathematiques Informatique et ApplicationsEA CNRSUniversite de Haute AlsaceRue des Freres Lumieres68096 MulhouseFrance Department of Mathematics and Statistics University of CyprusP.O.Box 205371678 NicosiaCyprus

In this paper,we study the numerical solution of the Stokes system in deformed axisymmetric *** the azimuthal direction the discretization is carried out by using truncated Fourier series,thus reducing the dimension of the *** resulting two-dimensional problems are discretized using the spectral element method which is based on the variational formulation in primitive *** meridian domain is subdivided into elements,in each of which the solution is approximated by truncated polynomial *** results of numerical experiments for several geometries are presented.

关键词： Spectral element method Stokes equations variational formulation deformed geometries Fourier expansion

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Stem cells' centrosomes: How can organelles identified 130 years ago contribute to the future of regenerative medicine?

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World Journal of Stem Cells 2021年第9期13卷 1177-1196页

作者： andreas Goutas Varvara Trachana Department of Biology Faculty of MedicineUniversity of ThessalyLarisa 41500BiopolisGreece

At the core of regenerative medicine lies the expectation of repair or replacementof damaged tissues or whole organs. Donor scarcity and transplant rejection aremajor obstacles, and exactly the obstacles that stem cell􀀀based therapy promisesto overcome. These therapies demand a comprehensive understanding of theasymmetric division of stem cells, i.e. their ability to produce cells with identicalpotency or differentiated cells. It is believed that with better understanding,researchers will be able to direct stem cell differentiation. Here, we describeextraordinary advances in manipulating stem cell fate that show that we need tofocus on the centrosome and the centrosome-derived primary cilium. This beliefcomes from the fact that this organelle is the vehicle that coordinates theasymmetric division of stem cells. This is supported by studies that report thesignificant role of the centrosome/cilium in orchestrating signaling pathways thatdictate stem cell fate. We anticipate that there is sufficient evidence to place thisorganelle at the center of efforts that will shape the future of regenerativemedicine.

关键词： Centrosome Primary cilium Asymmetry Self-renewal Differentiation Stemness

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Tribological behaviour of Ti_(3)C_(2)T_(x) nano-sheets: Substrate-dependent tribo-chemical reactions

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Friction 2023年第8期11卷 1522-1533页

作者： Alberto ROTA Nicolas BELLINA Bo WANG andreas ROSENKRANZ Dipartimento di Scienze Fisiche Informatiche e MatematicheUniversitàdi Modena e Reggio EmiliaModena 41125Italy CNR-Istituto di Nanoscienze Centro S3Modena 41125Italy Centro Interdipartimentale per la Ricerca Applicata e i Servizi nel settore della Meccanica Avanzata e della Motoristica Universitàdi Modena e Reggio EmiliaModena 41125Italy Key Laboratory of Marine New Materials and Related Technology Zhejiang Key Laboratory of Marine Materials and Protection TechnologyNingbo Institute of Material Technology&EngineeringChinese Academy of SciencesNingbo 315201China Department of Chemical Engineering Biotechnology and MaterialsUniversity of ChileSantiago 8370456Chile

MXenes,a newly emerging class of layered two dimensional(2D)materials,are promising solid lubricants due to their 2D structure consisting of weakly-bonded layers with a low shear strength and ability to form beneficial *** work aims at evaluating for the first time MXenes lubrication performance and tribofilm formation ability on different metallic substrates(mirror-lapped Fe and Cu discs).After depositing MXenes via ethanol(1 wt%)on the substrates,pronounced differences in the resulting substrate-dependent frictional evolution are *** MXenes are capable to reduce friction for both substrates after the full evaporation of ethanol,MXenes lubricating effect on Cu is long-lasting,with a 35-fold increased lifetime compared to *** spectra acquired in the wear-tracks of the substrates and counter-bodies reveal notable differences in the friction-induced chemical changes depending on the substrate *** case of Fe,the progressive failure of MXenes lubrication generates different Fe oxides on both the substrate and the ball,resulting in continuously increasing friction and a poor lubrication *** Cu,sliding induces the formation of a Ti_(3)C_(2)-based tribofilm on both rubbing surfaces,enabling a long-lasting lubricating *** work boosts further experimental and theoretical work on MXenes involved tribo-chemical processes.

关键词： Mxenes Ti_(3)C_(2)T_(x) nano-sheets coefficient of friction Raman spectroscopy tribochemistry

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Extracting commuter-specific destination hotspots from trip destination data-comparing the boro taxi service with Citi Bike in NYC

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Geo-Spatial Information Science 2020年第2期23卷 141-152页

作者： andreas Keler Jukka M.Krisp Linfang Ding Department of Civil Geo and Environmental EngineeringTechnical University of MunichMunichGermany Applied Geoinformatics Institute of GeographyUniversity of Augsburg(UniA)AugsburgGermany The KRDB Research Centre for Knowledge and Data Free University of Bozen-BolzanoBozen-BolzanoItaly Department of Cartography Technical University of MunichMunichGermany

Taxi trajectories from urban environments allow inferring various information about the transport service qualities and commuter *** is possible to associate starting and end points of taxi trips with requirements of individual groups of people and even social *** research shows that due to service restrictions,boro taxis have typical customer destination locations on selected Saturdays:many drop-off clusters appear near the restricted zone,where it is not allowed to pick up customers and only few drop-off clusters appear at complicated *** crossings imply recent infrastructural *** want to follow up on these results and add one additional group of commuters:Citi Bike *** selected Saturdays in June 2015,we want to compare the destinations of boro taxi and Citi Bike *** is challenging due to manifold differences between active mobility and motorized road users,and,due to the fact that station-based bike sharing services are restricted to *** and end points of trips,as well as the volumes in between rely on specific numbers of bike sharing ***,we introduce a novel spatiotemporal assigning procedure for areas of influence around static bike sharing stations for extending available computational methods.

关键词： Urban transportation spatial analysis mobility patterns boro taxis vehicle fleets bicycle-sharing service

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Diverging rationalities between forest fire management services and the general public after the 21st-century mega-fires in Greece

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Journal of Forestry Research 2022年第2期33卷 553-564页

作者： andreas Y.Troumbis Kostas Kalabokidis Palaiologos Palaiologou Department of Environment University of the Aegean81100 MytileneLesvos IslandGreece Department of Geography University of the Aegean81100 MytileneLesvos IslandGreece

Wildfire risk related to hazards on people and assets is expected to increase in the face of climate change,especially in fire-prone environments such as the Mediterranean *** rationalities,i.e.,the complex profile of multi-thematic,wildfire-related perceptions that collectively characterize and quantify all of a society’s responses,its interrelations,and influence on its insights,are of primary importance to understand the degree of preparedness and the direction that wildfire management policies are *** is a country that suffered mega-wildfire events during the first years of the twenty-first *** paper presents a scheme of advanced multivariate statistical procedures applied on standard social survey questionnaires to uncover different or similar rationalities between fire management services and the general ***-centered versus message-oriented rationalities is *** differ mainly on the priorities attributed to strengthening personnel and equipment capacities versus the need for public education and *** are evaluated against the needs of long-term risk assessment and forest management policies in *** main conclusion is that Greek society,although traumatized by recent fire disasters,is not yet prepared for long-term strategic forestry adaptation and planning.

关键词： Wildfire Qualitative research Rationality Fire governance Public Perception Risk assessment

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