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What would a US green hydrogen energy economy look like?

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Clean Energy 2023年第5期7卷 1148-1172页

作者： thomas Tonon Independent researcher Ph.D.Aerospace and Mechanical SciencesPrinceton University1971.11 Bolfmar AvenuePrinceton JunctionNJ 08550USA

Detailed description is given for a hypothetical US hydrogen economy with solar and wind energy supplying virtually all current energy needs and with electrolytic hydrogen the energy carrier and storage *** fuels provide nonfuel products(plastics,chemicals,cement and asphalt).Only current technologies are considered and hydrogen storage accommodates generation intermit-tency and variability,using pit storage of high-pressure vessels in open air,yielding daily storage round-trip energy installation costs of 722 and 538$/kWh for electric and thermal,respectively;and for power,2351 and 2240$/kW for electric and thermal,*** long-duration storage,the costs are 94.1 and 23.8$/kWh and 937 and 845$/kW,*** energy generation 20%over baseline accommodates low-season generation,obviates much required storage and ensures that reserves are topped off;96%of US 2022 total energy consumption is provided *** the default scenario(demand energy portions:half photovoltaic,quarter on-shore wind and quarter offshore wind),the surface area for the farms(including offshore surface)requires~4.6%of the US 48-state land *** 350 pit storage sites provide both daily and long-duration storage,with the latter accounting for complete loss of generation for 4 days over a quarter of the *** pipelines and a renewed electric grid transmit and distribute *** installation cost of the public infrastructure is~$27.8 trillion for the default *** scenarios show significant in-frastructure and cost savings when batteries are used for transportation and/or utility storage,provided current insufficiencies can be ***,cost levels in money,surface and infrastructure are within existing levels already achieved in historical events and modern living.

关键词： hydrogen economy renewable energy hydrogen storage hydrogen pipelines sustainable net zero

Injector Quantum Dot Molecule Infrared Photodetector:A Concept for Efficient Carrier Injection

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Nano-Micro Letters 2011年第2期3卷 121-128页

作者： thomas Gebhard thomas Gebhard Photonics InstituteVienna University of Technology

Quantum dot infrared photodetectors are expected to be a competitive technology at high oper ation temperatures in the long and very long wavelength infrared spectral *** the fact that they already achieved notable success,the performance suffers from the thermionic emission of electrons from the quantum dots at elevated temperatures resulting in a decreasing *** order to provide an efficient carrier injection at high temperatures,quantum dot infrared photodetectors can be separated into two parts:an injection part and a detection part,so that each part can be separately *** order to integrate such functionality into a device,a new class of quantum dot infrared photodetectors using quantum dot molecules will be *** addition to a general discussion simulation results suggest a possibility to realize such a device.

关键词： Quantum dot infrared photodetector Injection Quantum dot molecule High temperature operation Responsivity

Recent result from the A2 real photon facility at MAMI

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Chinese Physics C 2009年第12期33卷 1120-1126页

作者： Andreas thomas Institut fr Kernphysik University Mainz J.-J. Becherweg 45 D-55099 Mainz Germany

The upgraded MAMI C accelerator is delivering electrons with an energy of 1558 MeV routinely. The A2 collaboration is doing experiments with energy marked polarised real photons produced via ＂Bremsstrahlung＂. Recent results from the GDH-experiment using a longitudinal polarised frozen spin target in combination with the DAPHNE detector and from the Crystal Ball experiment at MAMI are presented.

关键词： photonuclear reactions polarization phenomena in reactions polarized and other targets leptoninduced reactions

Differential transport of a guild of mutualistic root aphids by the ant Lasius flavus

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Current Zoology 2023年第4期69卷 409-417页

作者： thomas Parmentier Research Unit of Environmental and Evolutionary Biology Namur Institute of Complex Systemsand Institute of LifeEarthand the EnvironmentUniversity of NamurRue de Bruxelles 61B-5000 NamurBelgium Terrestrial Ecology Unit(TEREC) Department of BiologyGhent UniversityK.L.Ledeganckstraat 35B-9000 GentBelgium

Mutually beneficial associations are widespread in ecological *** are typically assembled as multispecies guilds of symbionts that compete for one or more host *** ant Lasius flavus engages in an intriguing and obligate mutualistic association with a community of aphids that are cultivated on plant roots in its *** ant displays a repertoire of amicable behaviors toward the aphids,including their transport.I examined whether *** preferentially carried some of the root *** a no-choice and a choice experiment,I comparatively analyzed the transport rate of 5 obligate and one loosely associated species back to the ant nest and used the transport rate of the ant larvae as a *** associated root aphids were carried back to the nest,but in a clear preferential *** utricularia,Forda Formicaria,and Trama rara were rapidly transported,but slower than the own *** ulmi and Geoica setulosa were collected at a moderate rate and the loosely associated Aploneura lentisci was slowly *** contrast,different species of unassociated aphids were not transported and even provoked aggressive behavior in *** study revealed that co-occurring symbionts may induce different degrees of host attraction,which ultimately may affect the coexistence and assembly of ant-symbiont communities.

关键词： competition Formicidae honeydew rescue behavior symbiosis trophobiont

Brauer-Clifford Group of Lie-Rinehart Algebra

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Algebra Colloquium 2022年第1期29卷 99-112页

作者： thomas Guedenon Department of Mathematics University of ZiguinchorSenegal

In this paper we define the notion of Brauer Clifford group for(S,■)-Azumaya algebras when S is a commutative algebra and■is a(k,S)-Lie algebra over a commutative ring *** is the situation that arises in applications having connections to differential *** Brauer-Clifford group turns out to be an example of a Brauer group of *** monoidal category.

关键词： Lie-Rinehart algebras Hopf algebras Brauer groups Brauer-Clifford groups symmetric monoidal categories

Exploration behaviour and behavioural flexibility in orb-web spiders： A review

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Current Zoology 2015年第2期61卷 313-327页

作者： thomas HESSELBERG Department of Zoology University of Oxford Oxford OX1 3PS UK

Orb-web spiders and their webs constitute an ideal model system in which to study behavioural flexibility and spatial cognition in invertebrates due to the easily quantifiable nature of the orb web. A large number of studies demonstrate how spiders are able to modify the geometry of their webs in response to a range of different conditions including the ability to adapt their webs to spatial constraints. However, the mechanisms behind this impressive web-building flexibility in these cognitively limited animals remain poorly explored. One possible mechanism though may be spatial learning during the spiders＇ exploration of their immediate surroundings. This review discusses the importance of exploration behaviour, the reliance on simple behavioural rules, and the use of already laid threads as guidelines for web-building in orb-web spiders. The focus is on the spiders＇ ability to detect and adapt their webs to space limitations and other spatial disruptions. I will also review the few published studies on how spatial information is gathered during the exploration phase and discuss the possibility of the use of ＇cognitive map＇-like processes in spiders. Finally, the review provides suggestions for designing experimental studies to shed light on whether spiders gather metric information during the site exploration （cognitive map hypothesis） or rely on more simple binary information in combination with previously laid threads to build their webs （stigmergy hypothesis）.

关键词： Animal cognition Spider web-building stigmergy Cognitive maps Exploration behaviour Behavioural plasticity

A plant-based diet and stroke

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Journal of Geriatric Cardiology 2017年第5期14卷 321-326页

作者： thomas Campbell School of Medicine and Dentistry University of Rochester 601 Elmwood Ave Rochester NY 14642 USA.

stroke is a leading cause of death and disability in theUnited states and globally. Each year, approxirnately 795,000Americans experience a *** annual costs of stroke,both direct and indirect, amount to $33 billion. Ischemicstroke is predicted to cost more than $2.2 trillion between2005 and 2050. In the United states, 87% of all strokesare ischemic, 10% are due to intracerebral hemorrhage, and3% are due to subarachnoid hemorrhage.

关键词： Anticoagulation Plant-based diet Prevention stroke Vegan Vegetarian

Non-destructive silkworm pupa gender classification with X-ray images using ensemble learning

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Artificial Intelligence in Agriculture 2022年第1期6卷 100-110页

作者： Sania thomas Jyothi thomas Department of Computer Science and Engineering Christ(Deemed to be University)BangaloreIndia

Sericulture is the process of cultivating silkworms for the production of ***-quality production of silk without mixing with low quality is a great challenge faced in the silk production *** of the possibilities to overcome this issue is by separating male and female cocoons before extracting silk fibers from the cocoons as male cocoon silk fibers are finer than *** study proposes a method for the classification of male and female cocoons with the help of X-ray images without destructing the *** study used popular single hybrid varieties FC1 and FC2 mulberry silkworm *** shape features of the pupa are considered for the classification process and were obtained without cutting the cocoon.A novel point interpolation method is used for the computation of the width and height of the *** dimensionality reduction methods are employed to enhance the performance of the *** preprocessed features are fed to the powerful ensemble learning method AdaBoost and used logistic regression as the base *** model attained a mean accuracy of 96.3%for FC1 and FC2 in cross-validation and 95.3%in FC1 and 95.1%in FC2 for external validation.

关键词： Sericulture Gender classification stratified k-fold cross-validation Machine learning AdaBoost

SOME RECURRENCE FORMULAS FOR BOX SPLINES AND CONE SPLINES

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Approximation Theory and Its Applications 2002年第1期18卷 81-89页

作者： Patrick J. Van Fleet (University of st. thomas, USA) Department of Mathematics University of st. Thomas St. Paul USA

A degree elevation formula for multivariate simplex splines was given by Micchelli [6] and extended to hold for multivariate Dirichlet splines in [8]. We report similar formulae for multivariate cone splines and box-splines. To this end, we utilixe a relation due to Dahmen and Micchelli [4] that connects box splines and cone splines and a degree reduction formula given by Cohen , Lyche, and Riesenfcld in [2].

关键词： Th SOME RECURRENCE FORMULAS FOR BOX SPLINES AND CONE SPLINES Figure