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Non-symmetric differentially subordinate martingales and sharp weak-type bounds for Fourier multipliers

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Science China Mathematics 2024年第8期67卷 1807-1826页

作者： Meryem Akboudj Yong Jiao adam Osękowski School of Mathematics and Statistics Hunan Key Laboratory of Analytical Mathematics and ApplicationsCentral South UniversityChangsha 410075China Faculty of Mathematics Informatics and MechanicsUniversity of WarsawWarsaw 02-097Poland

Let p>2 be a given *** this paper,we prove,with the best constant,the weak-type(p,p)inequality■for a large class of non-symmetric Fourier multipliers T_(m) obtained via modulation of jumps of certain Lévy *** particular,the estimate holds for appropriate linear combinations of second-order Riesz transforms and skew versions of the Beurling-Ahlfors operator on the complex *** proof rests on a novel probabilistic bound for hilbert-space-valued martingales satisfying a certain non-symmetric subordination *** applications to harmonic functions and Riesz systems on Euclidean domains are indicated.

关键词： weak-type bound Fourier multiplier martingale differential subordination laminate

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The rate of deadwood decomposition processes in tree stand gaps resulting from bark beetle infestation spots in mountain forests

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Forest Ecosystems 2024年第3期11卷 339-346页

作者： Ewa Błonska adam Gorski Jarosław Lasota Department of Ecology and Silviculture Faculty of ForestryUniversity of Agriculture in Krakow29 Listopada 46 Str.31-425KrakowPoland

Decaying wood is an essential element of forest ecosystems and it affects its other *** aim of our research was to determine the decomposition rate of deadwood in various humidity and thermal conditions in the gaps formed in the montane forest *** research was carried out in the Babiog orski National *** research plots were marked out in the gaps of the stands,which were formed as a result of bark beetle *** plots were located in undisturbed *** research covered wood of two species–spruce and beech in the form of cubes with dimensions of 50 mm×50 mm×22 *** samples were placed directly on the soil surface and subjected to laboratory analysis after 36 months.A significant influence of the wood species and the study plot type on the physicochemical properties of the tested wood samples was *** characteristics strongly correlated with soil moisture.A significantly higher mass decline of wood samples was recorded on the reference study plots,which were characterized by more stable moisture *** decomposition of wood in the gaps regardless of the species is related to lower *** wood species covered by the study differed in the decomposition *** wood samples were characterized by a significantly higher decomposition rate compared to beech wood *** research has confirmed that disturbances that lead to the formation of gaps have a direct impact on the decomposition process of deadwood.

关键词： Bark beetle Beech Decomposition rate Forest ecosystem Mass decline Spruce Woody debris

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Pioneering the direct large-scale laser printing of flexible "graphenic silicon" self-standing thin films as ultrahigh-performance lithium-ion battery anodes

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CARBON ENERGY 2024年第7期6卷 26-40页

作者： Kothuru, Avinash Cohen, adam Daffan, Gil Juhl, Yonatan Patolsky, Fernando Tel Aviv Univ Fac Exact Sci Sch Chem Tel Aviv Israel Tel Aviv Univ Iby & Aladar Fleischman Fac Engn Dept Mat Sci & Engn Tel Aviv Israel Aviv Univ Fac Exact Sci Sch Chem IL-69978 Aviv Israel

Recent technological advancements, such as portable electronics and electric vehicles, have created a pressing need for more efficient energy storage solutions. Lithium-ion batteries (LIBs) have been the preferred choice for these applications, with graphite being the standard anode material due to its stability. however, graphite falls short of meeting the growing demand for higher energy density, possessing a theoretical capacity that lags behind. To address this, researchers are actively seeking alternative materials to replace graphite in commercial batteries. One promising avenue involves lithium-alloying materials like silicon and phosphorus, which offer high theoretical capacities. Carbon-silicon composites have emerged as a viable option, showing improved capacity and performance over traditional graphite or pure silicon anodes. Yet, the existing methods for synthesizing these composites remain complex, energy-intensive, and costly, preventing widespread adoption. A groundbreaking approach is presented here: the use of a laser writing strategy to rapidly transform common organic carbon precursors and silicon blends into efficient "graphenic silicon" composite thin films. These films exhibit exceptional structural and energy storage properties. The resulting three-dimensional porous composite anodes showcase impressive attributes, including ultrahigh silicon content, remarkable cyclic stability (over 4500 cycles with similar to 40% retention), rapid charging rates (up to 10 A g(-1)), substantial areal capacity (>5.1 mAh cm(-2)), and excellent gravimetric capacity (>2400 mAh g(-1) at 0.2 A g(-1)). This strategy marks a significant step toward the scalable production of high-performance LIB materials. Leveraging widely available, cost-effective precursors, the laser-printed "graphenic silicon" composites demonstrate unparalleled performance, potentially streamlining anode production while maintaining exceptional capabilities. This innovation not only paves the

关键词： 4D printing energy storage fast-charging laser-induced graphene lithium-ion silicon carbon composite anodes COMPOSITE

Community-led total sanitation(CLTS)implementation in West Mamprusi Municipal Assembly in *** do communities think eleven years on?

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Global health Journal 2024年第2期8卷 67-73页

作者： Elijah adam Emmanuel Badu School of Media Creative and Social InquiryCurtin UniversityBentleyWestern AustraliaAustralia School of Population health Curtin UniversityBentleyWestern AustraliaAustralia

Objective Access to improved sanitation is a fundamental human right and an important aspect of Public ***,an estimated thousands of people in Ghana especially,the West Mamprusi Municipal Assembly(WMMA)still have no access to adequate toilet *** has brought untold health repercussions to the inhabitants,the community,and the environment at *** address this menace,the community-led total sanitation(CLTS)was *** study aimed to assess communities’perspectives on the implementation of CLTS and to understand the factors influencing its success and *** A mixed-method approach involving sequential qualitative and quantitative methods was employed in this *** for the quantitative study were randomly selected and surveyed using *** qualitative study employed focus group discussion involving purposively sampled participants including assembly members,opinion leaders,and assembly *** The CLTS program in WMMA realized an apparent use of construction and proper use of household latrines leading to a reduction of open defecation free(ODF)and two communities achieving sanitized status in the history of the study area,enabling the training of latrine artisans and natural leaders to facilitate the CLTS expansion and sustainability,improved sanitation and hygiene,strengthened the enforcement of community rules and regulations and many *** The CLTS program has received more widespread acceptance in the study area than the previous government policy of constructing public toilets,which was greeted with massive failures due to poor *** ensure that gains achieved through CLTS implementation are sustained longer,it is recommended that chiefs and opinion leaders should be involved in the CLTS programs to ensure checks and *** entrenchment of bylaws and more education to address enduring myths and misconceptions will sustain the *** in the form

关键词： Community-led total sanitation(CLTS) Community development Ghana Sanitation

‘Jelly to Joule’:Direct laser writing of sustainable jellyfish-based ‘graphenic silicon’ anodes for environmentally remediating high-performance lithium-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 553-565页

作者： Gil Daffan adam Cohen Yuval Sharaby Roman Nudelman Shachar Richter Fernando Patolsky Department of Materials Science and Engineering the Iby and Aladar Fleischman Faculty of Engineering Tel Aviv University School of Chemistry Faculty of Exact Sciences Tel Aviv University

The ramifications of global climate change and resource scarcities have made it imperative to re-examine the definition of sustainable energy-storage *** is crucial to recognize that not all renewable resources are inherently sustainable,and their full impact on the environment must be *** the proliferation of invasive jellyfish species wreaking havoc on marine ecosystems and economies worldwide,utilizing overabundant jellyfish as a carbon source presents an opportunity to create energy-storage systems that are both financially beneficial and environmentally ***,a comprehensive approach to sustainability also requires eco-friendly solutions throughout the entire lifecycle,from material sourcing to battery production,without compromising highperformance ***,most electrode syntheses for lithium-ion batteries(LIBs) employed are energy-intensive,multiple-steps,complex,and *** response,this work pioneers the straightforward use of low-energy laser irradiation of a jellyfish biomass/silicon nanoparticle blend to encapsulate the silicon nanoparticles in-situ within the as-forming conductive carbonized matrix,creating sustainable and additive-free composite *** self-standing anode is directly synthesized under ambient conditions and requires no ***,a laser-synthesized conductive threedimensional porous carbon/silicon composite anode from raw jellyfish biomass for LIBs is presented,displaying outstanding cyclic stability(>1000 cycles),excellent capacity retention(>50% retention after1000 cycles),exceptional coulombic efficiency(>99%),superb reversible gravimetric capacity(>2000 mAh/g),and high rate performance capability(>1.6 A/g),paving a new path to future sustainable energy production.

关键词： Biomass Carbon Jellyfish Laser Lithium Silicon Sustainable

Current concepts in the management of non-cirrhotic non-malignant portal vein thrombosis

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World Journal of hepatology 2024年第5期16卷 751-765页

作者： adam J Willington Dhiraj Tripathi Department of hepatology University Hospitals Birmingham NHS Foundation TrustBirmingham B152GWUnited Kingdom Department of hepatology University Hospitals BirminghamBirmingham B152THUnited Kingdom

Non-cirrhotic non-malignant portal vein thrombosis(NCPVT)is an uncommon condition characterised by thrombosis of the portal vein,with or without extension into other mesenteric veins,in the absence of cirrhosis or intra-abdominal *** can include intestinal infarction,variceal bleeding and portal *** this article,we address current concepts in the management of NCPVT including identification of risk factors,classification and treatment,and review the latest evidence on medical and interventional management options.

关键词： Non-cirrhotic portal vein thrombosis Portal vein Mesenteric veins Venous thrombosis Portal hypertension

Photometric and Spectroscopic Study of Ten Low Mass Ratio Contact Binary Systems:Orbital Stability,O'Connell Effect and Infrared Calcium Line Filling

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Research in Astronomy and Astrophysics 2024年第8期24卷 212-222页

作者： Surjit S.Wadhwa adam Popowicz Raúl Michel Petar Kostić Oliver Vince Nick F.h.Tothill Ain Y.De horta Miroslav D.Filipović School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia Department of Electronics Electrical Engineering and MicroelectronicsSilesian University of TechnologyAkademicka 1644120 GliwicePoland Instituto de Astronomía UNAM.A.P.87722800 EnsenadaBCMéxico Astronomical Observatory Volgina 711060 BelgradeSerbia

Low mass ratio contact binary systems are more likely to have unstable orbits and potentially *** addition,such systems exhibit characteristics such as starspots and high energy emissions(UV)suggestive of chromospheric and magnetic *** curve modeling of ten contact binary systems is *** were found to be of extreme low mass ratio ranging from 0.122 to 0.24 and three were found to be potentially unstable and possible merger *** of the infrared calcium absorption lines is a marker of increased chromospheric *** use the available Large Sky Area Multi-Object Fiber Spectroscopic Telescope spectra along with matched standard spectra(broadened for rotation)to measure the excess filling of the central core depression flux of the two main infrared calcium absorption linesλ8542 andλ*** find that all reported contact binaries have excess filling of the core flux in the infrared calcium *** of the systems reported were also observed by the Galaxy Evolution Explorer mission and we find that all three have features of excess ultraviolet emissions further adding evidence for increased chromospheric activity in low mass ratio contact *** of both orbital stability and absorption line filling is dependent on the determination of geometric and absolute parameters from light curve *** an insignificant number of contact binary light curves exhibit the O’Connell effect,usually attributed to *** discuss the inclusion of starspots in light curve solutions and how they influence the geometric and absolute parameters.

关键词： (stars)binaries eclipsing-techniques photometric-stars chromospheres

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Examining the“revisability”benefit of hip resurfacing arthroplasty

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World Journal of Orthopedics 2024年第6期15卷 554-559页

作者： Jose George adam J Taylor Thomas P Schmalzried Department of Orthopedics Harbor UCLA Medical CenterTorranceCA 90509United States

BACKGROUND hip resurfacing arthroplasty(hRA)is an alternative to total hip arthroplasty(ThA)that is typically reserved for young active patients because it preserves ***,the benefits of hRA only hold true if conversion ThA after failed hRA provides acceptable *** To compare patient reported outcomes for conversion ThA after hRA failure to primary *** A retrospective review of 36 patients(37 hips)that underwent conversion ThA for failed hRA between October 2006 and May 2019 by a single surgeon was *** reported outcomes[modified harris hip Score(mhhS),University of California Los Angeles(UCLA)activity score]were obtained via an email-based responder-anonymous *** were compared to normative data of a primary ThA cohort with similar *** analysis was performed comparing outcomes of conversion ThA for adverse local tissue reaction(ALTR)vs all other causes for *** The study group had a lower mhhS than the control group(81.7±13.8 vs 90.2±11.6,Phowever,both groups had similar UCLA activity levels(7.5±2.3 vs 7.2±1.6,P=0.51).Patients that underwent conversion for non-ATLR causes had similar mhhS(85.2±11.5 vs 90.2±11.6,P=0.11)and higher UCLA activity levels(8.5±1.8 vs 7.2±1.6,Phe control *** that underwent conversion for ATLR had worse mhhS(77.1±14.5 vs 90.2±11.6,Phen compared to the control *** Patient outcomes equivalent to primary ThA can be achieved following hRA conversion to ***,inferior outcomes were demonstrated for ALTR-related hRA *** selection and perhaps further studies examining alternative hRA bearing surfaces should be considered.

关键词： Total hip arthroplasty hip resurfacing arthroplasty Conversion total hip arthroplasty Adverse local tissue reaction Patient reported outcome measures

Analysis of Differences in Electrochemical Performance Between Coin and Pouch Cells for Lithium-Ion Battery Applications

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Energy & Environmental Materials 2024年第03期7卷 63-67页

作者： Yeonguk Son hyungyeon Cha Taeyong Lee Yujin Kim adam Boies Jaephil Cho Michael De Volder Department of Engineering University of Cambridge Department of Chemical Engineering Changwon National University Department of Energy Engineering School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)

Small coin cell batteries are predominantly used for testing lithium-ion batteries (LIBs) in academia because they require small amounts of material and are easy to ***,insufficient attention is given to difference in cell performance that arises from the differences in format between coin cells used by academic researchers and pouch or cylindrical cells which are used in *** this article,we compare coin cells and pouch cells of different size with exactly the same electrode materials,electrolyte,and electrochemical *** show the battery impedance changes substantially depending on the cell format using techniques including Electrochemical Impedance Spectroscopy (EIS) and Galvanostatic Intermittent Titration Technique (GITT).Using full cell NCA-graphite LIBs,we demonstrate that this difference in impedance has important knock-on effects on the battery rate performance due to ohmic polarization and the battery life time due to Li metal plating on the *** hope this work will help researchers getting a better idea of how small coin cell formats impact the cell performance and help predicting improvements that can be achieved by implementing larger cell formats.

关键词： coin cell full cell lithium-ion batteries pouch cell