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Carbon Energy 2021年第4期3卷 654-665页

作者： Ignacio jiménez-Morales Alvaro Reyes-Carmona Marc Dupont Sara Cavaliere Marlene Rodlert Flavio Mornaghini mikkel j.larsen Madeleine Odgaard jerzy Zajac Deborah j.jones jacques Rozière ICGM Universitéde Montpellier CNRSENSCMMontpellierFrance Institut Universitaire de France(IUF) ParisFrance Imerys Graphite and Carbon BodioSwitzerland IRD Fuel Cells A/S Odense SØDenmark

In this paper,an extensive characterisation of a range of carbon blacks(CB)with similar surface area but different surface chemistry is carried out by flow calorimetry,Raman spectroscopy,dynamic water vapour sorption,instrumental gas analysis,nitrogen adsorption/desorption and high potential *** these carbon materials as supports,Pt/CB electrocatalysts are prepared by microwave-assisted polyol-mediated synthesis in gram ***,morphological and electrochemical properties of the prepared electrocatalysts are evaluated by X-ray diffraction,transmission electron microscopy,rotating disc electrode and in situ fuel cell characterisation of the corresponding membrane-electrode *** obtained results allow to establish a relationship between surface chemistry and electrochemical properties useful for the design of Pt/C catalyst layers with high performance and stability.

关键词： carbon black electrocatalyst support fuel cell cathodes surface properties

Additive manufacturing of prototype elements with process interfaces for continuously operating manufacturing lines

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Asian journal of Pharmaceutical Sciences 2018年第6期13卷 575-583页

作者： Cosima Hirschberg mikkel Schmidt larsen johan Peter Botker jukka Rantanen Department of Pharmacy University of Copenhagen

Rapid prototyping based on in silico design and 3D printing enables fast customization of complex geometries to multiple needs. This study utilizes, additive manufacturing for rapid prototyping of elements for continuously operating mixing geometries including interfaces with process analytical technology(PAT) tools, to show that 3D printing can be used for prototyping of both parts of production line and PAT interfacing solution. An additional setup was designed for measuring the dynamic calibration samples for a semi-quantitative near infrared(NIR) spectroscopic model. The powder was filled in a small calibration chamber and in-line NIR spectra of calibration samples were collected from moving material while mimicking the powder flow dynamics in a typical continuous mixer. This dynamic powder mixing system was compared with a static powder calibration model where the NIR probe was placed at different positions on a static sample. Principal component analysis(PCA) revealed that the 3D printed device with dynamic measurement of the NIR spectra had more potential for quantitative analysis. With the prototype continuous mixer, two differently placed process interfaces for NIR spectroscopic monitoring of the powder mixing were evaluated. With this approach, the importance of positioning the process analytical tools to assess the blend uniformity could be demonstrated. It was also observed that with the longer mixing geometry, a better mixing result was achieved due to a larger hold up volume and increased residence time.

关键词： 3D printing Continuous mixing Near-infrared spectroscopy Additive manufacturing

Long-Range VNA-Based Channel Sounder: Design and Measurement Validation at MmWave and Sub-THz Frequency Bands

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China Communications 2022年第11期19卷 47-59页

作者： mikkel Bengtson Yejian Lyu Wei Fan Department of Electronic Systems Aalborg UniversityAalborgØst 9220Denmark

With the increasing demand for high bandwidth wireless communication systems,and with a congested spectrum in the sub-6 GHz frequency bands,researchers have been looking into exploration of millimeter wave(mmWave)and sub-terahertz(subTHz)frequency *** modeling is essential for system design and performance evaluation of new wireless communication *** channel modeling relies on reliable measured channel data,which is collected by high-fidelity channel ***,it is of importance to understand to which extent channel parameters are frequency dependent in typical deployment scenario(including both indoor short-range and outdoor long-range scenarios).To achieve this purpose,this paper presents a stateof-art long-range 28 GHz and 300 GHz VNA-based channel sounder using optical cable solutions,which can support a measurement range up to 300 m and 600 m in principle,*** design,development and validation of the long-range channel sounders at mmWave and sub-THz bands are reported,with a focus on their system principle,link budget,and backto-back ***,a measurement campaign in an indoor corridor is performed using the developed 300 GHz system and 28 GHz channel sounding *** measured channels at the 28 GHz and 300 GHz channels are shown to be highly sparse and specular.A higher number of Multi Path Components(MPC)are observed for the 28 GHz system,while the same main MPC are observed for both systems.

关键词： mmWave channel sounding sub-THz radio propagation beyond 5G communications

Comparisons of jOULE 1 rocket thermospheric wind observations in high latitudes with GITM simulations

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Science China(Technological Sciences) 2017年第3期60卷 412-418页

作者： DENG Yue larsen Miguel F RIDLEY Aaron j ZHAN TianYu Department of Physics University of Texas at Arlington Department of Physics Clemson University Center for Space Environment Modeling The University of Michigan

4 Summary and conclusion The jOULE sounding rocket 1 experiment was carried out at Poker Flat Research Range in Alaska around 1200 UT on March 27th,2003 with two instrumented rockets and one chemical tracer *** the released TMA trails,neutral wind measurements from approximately 85 to 160 km altitude showed a vertically propagating wave and a jet structure around 120 km *** shears appeared at the bottom side of the jet with Richardson numbers close to or smaller than the critical value of 0.25,which implies the possible existence of Kelvin-Helmholtz instabilities caused by the vertical shear in the fast flows.

关键词： target tracking parallel vision processor MRID skipping searching image processing

Developing a molecular platform for potential carbon dioxide fixing

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Frontiers of Chemical Science and Engineering 2010年第2期4卷 236-239页

作者： Mette mikkelSEN mikkel jøRGENSEN Frederik C.KREBS RisøNational Laboratory for Sustainable Energy Technical University of DenmarkFrederiksborgvej 399DK-4000 RoskildeDenmark

This paper presents an attempt to develop a new system for fixing carbon dioxide from the *** proposed molecular system has been designed to have the capacity to spontaneously bind CO_(2)from the atmosphere with high *** molecular system is furthermore designed to have the ability to liberate CO_(2)at a later stage in the process,i.e.,in a separate *** liberated CO_(2)presents a carbon neutral way of obtaining pure CO_(2).The proposed molecular system is based on a small stable organic molecule that potentially have two forms:one without bound CO_(2)and one with bound CO_(2).One class of molecules that undergo a reaction compatible with our purposal is the merocyanine dyes that exhibit photochromic *** on this structural class of molecules,a system for the potential fixing of CO_(2)has been developed.

关键词： CO_(2)fixing agent merocyanine dyes CO_(2)liberation

Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

Removal of chromophoric dissolved organic matter under combined photochemical and microbial degradation as a response to different irradiation intensities

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journal of Environmental Sciences 2022年第8期34卷 76-86页

作者： Theis Kragh Kaj Sand-jensen Emil Kristensen Ole Pedersen mikkel Madsen-Фterbye Department of Biology University of Southern DenmarkSyddanmark 5230Denmark Freshwater Biological Laboratory Department of BiologyUniversity of CopenhagenCopenhagen 2100Denmark

Throughout the freshwater continuum, Dissolved Organic Carbon(DOC) and the colored fraction, Chromophoric Dissolved Organic Material(CDOM), are continuously being added,removed, and transformed, resulting in changes in the chromophoricity and lability of organic matter over time. We examined, experimentally, the effect of increasing irradiationintensities on the combined photochemical and microbial degradation of CDOM and *** was done by using a simulated mixed water column: aged water from a humic lake was exposed to four irradiation-intensities – representing winter, early and late spring, and summer conditions(0.10, 0.16, 0.36, and 0.58 W/m^(2)) – and compared with dark controls over 37days. We found a linear relationship between CDOM degradation and irradiation-intensities up to 0.36 W/m^(2);the degradation rate saturated at higher intensities, both at specific wavelengths and for broader intervals. After 37 days at high irradiation-intensity, CDOM absorption of irradiation at 340 nm had been reduced by 41%;48% of DOC had been removed and DOC degradation continued to increase. Aromaticity(SUVA254) declined significantly over 37 days at the two lowest but not at the two highest UV-intensities;levels in unexposed control water remained constant. Direct observations of the humic lake showed that CDOM absorption of irradiation(340 nm) declined by 27% from winter to summer. A model based on hydrological CDOM input and CDOM degradation calculated from field measurements of UV-radiation and experimental CDOM degradation with UV-exposure from sunlight accurately predicted the annual course as observed in the lake. With no external CDOM input,92% of the CDOM could be degraded in a year. The results support the notion that combined photochemical and microbial CDOM degradation can be remarkably higher in lakes than previously thought and that humic lakes retain their color due to light absorption by ongoing CDOM input.

关键词： Biodegradation Brownification Carbon cycling CDOM DOC Humic lake Photobleaching UV-bleaching

Taxonomic changes regarding three species of Zingiber (Zingiberaceae) from Thailand

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植物分类学报 2007年第3期45卷 403-404页

作者： Pramote TRIBOUN Pranom CHANTARANOTHAI Kai larsen Applied Taxonomic Research Center Department of BiologyFaculty of ScienceKhon Kaen University Khon KaenThailand 40002 The Herbarium University of AarhusBuilding 137UniversitetsparkenDK-8000 Aarhus CDenmark

Zingiber teres S. Q. Tong & Y. M. Xia and Z. xishuangbannaense S. Q. Tong are reduced to be synonyms of Z. smilesianum Craib and Z. thorelii Gagnep.,respectively. Z. cochinchinense Gagnep. is changed to be a subspecie... 详细信息

关键词：姜科泰国植物学分类新种

Bistability theorem in a cancer model

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International journal of Biomathematics 2018年第1期11卷 61-98页

作者： jens Christian larsen Vanlcse Alle 50 2. mr. tv2720 VanlCse Copenhagen Denmark

In this paper, I continue the study of the mathematical models presented in [j. C. larsen, Models of cancer growth, j. Appl. Math. Comput. 53（1-2）（2015） 613-645] and [j. C. larsen, The bistability theorem in a model of metastatic cancer, to appear in Appl. Math.]. I shall prove the bistability theorem for the ODE model from [larsen, 2015]. It is a mass action kinetic system in the variables C cancer, GF growth factor and GI growth inhibitor. This theorem says that for some values of the parameters, there exist two positive singular points c＊＋ = （C＊＋, GF＊., GI＊＋）, c＊2- = （C＊-, GF＊, GI＊-） of the vector field. Here C＊- 〈 C＊＋ and e. is stable and c＊＋ is unstable, see Sec. 2. There is also a discrete model in [larsen, 2015], it is a linear map （T） on three-dimensional Euclidean vector space with variables （C, GF, GI）, where these variables have the same meaning as in the ODE model above. In [larsen, 2015], I showed that one can sometimes find attine vector fields on three-dimensional Euclidean vector space whose time one map is T. I shall also show this in the present paper in a more general setting than in [larsen, 2015]. This enables me to find an expression for the rate of change of cancer growth on the coordinate hyperplane C = 0 in Euclidean vector space. I also present an ODE model of cancer metastasis with variables C, CM, CF,GI, where C is primary cancer and CM is metastatic cancer and GF, GI are growth factors and growth inhibitors, respectively.

关键词： Immunology cancer chemotherapy immune therapy discrete dynamicalsystem Gompertz function.

Surgery for Peyronie＇s disease

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Asian journal of Andrology 2013年第1期15卷 27-34页

作者： Laurence A Levine Stephen M larsen Department of Urology Rush University Medical Center Chicago IL 60612 USA

Peymnie＇s disease （PD） is most simply referred to as a fibrotic wound-healing disorder of the tunica albuginea. It is both a physically and psychologically devastating disorder that causes penile deformity, curvature, hinging, narrowing and shortening, which may compromise sexual function. Although a variety of non-surgical treatments have been suggested, none to date offer a reliable and effective correction of the penile deformity. As a result, surgery remains the gold standard treatment option, offering the most rapid and reliable treatment which will be the focus of this article. We review the preoperative evaluation, surgical algorithm, graft materials and postoperative management of PD. Outcomes for tunical shortening, tunical lengthening and penile prosthesis placement for penile straightening are reviewed. Tunica albuginea plication is the preferred method of straightening for men with adequate rigidity and less severe disease defined as curvature less than 70° without narrowing/hinging. Men who have more severe, complex deformity, but maintain strong preoperative erectile function should be considered candidates for straightening with plaque incision or partial excision and grafting. Finally, for those men who have inadequate rigidity and PD, penile prosthesis placement with straightening is the best approach to address both problems.

关键词： penile prosthesis Peyronie's disease, penile reconstruction plaque excision and grafting plaque incision tunica albuginea plication