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Theoretical potential for low energy consumption phase change memory utilizing electrostatically-induced structural phase transitions in 2D materials

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npj Computational Materials 2018年第1期4卷 653-661页

作者： daniel A.Rehn Yao Li Eric Pop Evan j.Reed Department of Mechanical Engineering Stanford UniversityStanfordCA 94305USA Department of Applied Physics Stanford UniversityStanfordCA 94305USA Department of Electrical Engineering Stanford UniversityStanfordCA 94305USA Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA

Structural phase-change materials are of great importance for applications in information storage *** driven structural phase transitions are employed in phase-change memory to achieve lower programming voltages and potentially lower energy consumption than mainstream nonvolatile memory ***,the waste heat generated by such thermal mechanisms is often not optimized,and could present a limiting factor to widespread *** potential for electrostatically driven structural phase transitions has recently been predicted and subsequently reported in some two-dimensional materials,providing an athermal mechanism to dynamically control properties of these materials in a nonvolatile fashion while achieving potentially lower energy *** this work,we employ DFT-based calculations to make theoretical comparisons of the energy required to drive electrostatically-induced and thermally-induced phase *** theoretical limits in monolayer MoTe2 and thin films of Ge_(2)Sb_(2)Te_(5),we find that the energy consumption per unit volume of the electrostatically driven phase transition in monolayer MoTe2 at room temperature is 9% of the adiabatic lower limit of the thermally driven phase transition in Ge_(2)Sb_(2)Te_(5).Furthermore,experimentally reported phase change energy consumption of Ge_(2)Sb_(2)Te_(5) is 100–10,000 times larger than the adiabatic lower limit due to waste heat flow out of the material,leaving the possibility for energy consumption in monolayer MoTe2-based devices to be orders of magnitude smaller than Ge_(2)Sb_(2)Te_(5)-based devices.

关键词： transitions phase structural

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Psychological, social, and sexual challenges affecting men receiving male infertility treatment: a systematic review and implications for clinical care

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Asian journal of Andrology 2023年第4期25卷 448-453页

作者： Winston Wu justin La Kathryn M Schubach daniel Lantsberg Darren j Katz Department of Urology Western HealthSt AlbansVIC 3021Australia Department of Urology Kaiser Permanente San Rafael Medical CenterSan RafaelCA 94903USA Men’s Health Melbourne MelbourneVIC 3000Australia Reproductive Services Unit The Royal Women’s HospitalParkvilleVIC 3052Australia Melbourne IVF East MelbourneVIC 3002Australia Department of Surgery Western PrecinctUniversity of MelbourneParkvilleVIC 3010Australia

In recent years, social research surrounding the consequences of infertility has increasingly focused on the male perspective;however, a gap exists in the understanding of men’s experiences of male infertility treatment. This review aims to synthesize theexisting evidence concerning the psychological, social, and sexual burden of male infertility treatment on men, as well as patientneeds during clinical care. A systematic search identified 12 studies that are diverse in design, setting, and methods. Psychologicalevaluations have found that urological surgery may have a lasting impact on infertility-specific stress, and treatment failure canlead to feelings of depression, grief, and inadequacy. Men tended to have an avoidant coping mechanism throughout fertilitytreatment, and their self-esteem, relationship quality, and sexual functions can be tied to outcomes of treatment. Partner bonds canbe strengthened by mutual support and enhanced communication;couple separation, however, has been noted as a predominantreason for discontinuing male infertility treatment and may be associated with difficult circumstances surrounding severe maleinfertility. Surgical treatments can affect the sexual functioning of infertile men;however, the impact of testicular sperm extractionoutcomes appears to be psychologically driven whereas the improvements after microsurgical varicocelectomy are only evident inhypogonadal men. Clinically, there is a need for better inclusion, communication, education, and resource provision, to addressreported issues of marginalization and uncertainty in men. Routine psychosocial screening in cases of severe male infertility andfollow-up in cases of surgical treatment failure are likely beneficial.

关键词： male infertility male infertility treatment patient experience patient-centered care psychosocial sexual

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Urban invaders are not bold risk-takers: a study of 3 invasive lizards in Southern California

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Current Zoology 2020年第6期66卷 657-665页

作者： Breanna j.Putman Gregory B.Pauly daniel T.Blumstein Department of Ecology and Evolutionary Biology University of CaliforniaLos AngelesCA90095-1606USA Department of Herpetology and Urban Nature Research Center Natural History Museum of Los Angeles County900 Exposition BoulevardLos AngelesCA90007USA Department of Biology California State UniversitySan BernardinoCA 92407USA

Biological invasions threaten biodiversity worldwide,and therefore,understanding the traits of successful invaders could mitigate their *** comm only invasive species do well in disturbed habitats,such as urban environments,and their abilities to effectively respond to disturbarices could con tribute to their ***,there are non invasive species that also do well in disturbed *** question remains whether urban invaders behave differently in urban environments than noninvaders,which could suggest an"urban-exploiting"*** Southern California,the co-occurrence of in vasive Italia n wall lizards Pod arc is siculus,brown anoles Anolis sagrei,and green anoles ***,and native western fence lizards Sceloporus occidentalis offers an opportunity to test whether invasives exhibit consistent differences in risk-taking within human-altered habitats compared with a native *** predicted that invasive lizards would exhibit more bold behavior by having shorter flight-initiation distances(FIDs)and by being found farther from a refuge(behaviors that would presumably maximize foraging in low-risk environments).Invasive populations had similar or longer FIDs,but were consistently found at distances closer to a ***,invasive lizards in urban habitats were not bolder than a native *** on nearby refuges might help species successfully invade urban habitats,and if a general pattern,may pose an added challenge in detecting or eliminating them.

关键词： antipredator boldness escape behavior invasion reptile urban ecology

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Distributed Secondary Control Based on Dynamic Diffusion Algorithm for Current Sharing and Average Voltage Regulation in DC Microgrids

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journal of Modern Power Systems and Clean Energy 2024年第2期12卷 597-607页

作者： Dawei Liao Fei Gao daniel j.Rogers Wentao Huang Dong Liu Houjun Tang Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghaiChina Department of Engineering Science University of OxfordOxford OX12JDU.K. IEEE

This paper introduces a distributed secondary control scheme for achieving current sharing and average voltage regulation objectives in a DC *** proposed scheme employs a dynamic diffusion algorithm(DDA)instead of the consensus algorithm to enable distributed communication among *** help understand DDA,the relation of DDA and other diffusion algorithms is discussed in detail and its superiority is shown by comparison with diffusion and consensus ***,considering the discrete nature and different sampling time of the digital controller and communication network,a z-domain model of the entire DC microgrid is *** influence of communication and secondary control parameters on the system stability is *** on the established model,the tolerable communication rates are ***-time simulations conducted on the OPAL-RT platform validate the effectiveness of the proposed scheme,showcasing its advantages in terms of convergence speed and stability.

关键词： Cooperative control DC microgrid diffusion algorithm discrete-time modeling distributed secondary control

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Sperm retrieval and intracytoplasmic sperm injection outcomes in men with cystic fibrosis disease versus congenital bilateral absence of the vas deferens

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Asian journal of Andrology 2021年第2期23卷 140-145页

作者： j Abram McBride Taylor P Kohn daniel j Mazur Larry I Lipshultz R Matthew Coward Scott Department of Urology Baylor College of MedicineHoustonTX 77030USA Department of Urology UNC School of MedicineChapel HillNC 27599USA UNC Fertility RaleighNC 27617USA

Recent data suggest that cystic fibrosis transmembrane conductance regulator(CFTR)gene alterations negatively impact male fertility beyond *** sought to compare gene alterations,sperm retrieval rates,and intracytoplasmic sperm injection(ICSI)outcomes among men with cystic fibrosis(CF)disease and congenital bilateral absence of the vas deferens(CBAVD)*** retrospectively evaluated all men who underwent surgical sperm retrieval at two academic,high-volume andrology centers from 2010 to *** men with documented CFTR alterations and obstructive azoospermia from either CBAVD or CF were *** between groups for CFTR abnormality,sperm retrieval,and ICSI outcomes were statistically ***,39 patients were included with 10 in the CF and 29 in the CBAVD *** sperm retrieval rates were significantly lower in the CF group for sperm concentration(14.8×10^(6)ml^(-1)vs 61.4×10^(6)ml^(−1),P=0.02)and total motile sperm count(2.9 million vs 11.4 million,P=0.01).This difference was only predicted by homozygous delta F508 CFTR mutations(P<0.05).The CF group also demonstrated a significantly higher rate of rescue testicular sperm extraction(70.0%vs 27.6%,P<0.03)and lower fertilization rate with ICSI(32.5%vs 68.9%,P<0.01).In conclusion,those with CF demonstrated lower sperm quality,greater difficulty with sperm retrieval,and worse ICSI outcomes compared with CBAVD-only *** delta F508 CFTR mutations appear to significantly impair spermatogenesis and sperm function.

关键词： congenital bilateral absence of the vas deferens cystic fibrosis intracytoplasmic sperm injection outcomes male infertility obstructive azoospermia

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Cytokines from the pig conceptus:roles in conceptus development in pigs

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journal of Animal Science and Biotechnology 2015年第2期6卷 130-141页

作者： Rodney D Geisert Matthew C Lucy jeffrey j Whyte jason W Ross daniel j Mathew Animal Sciences Research Center University of Missouri Department of Animal Science Iowa State University

Establishment of pregnancy in pigs involves maintaining progesterone secretion from the corpora lutea in addition to regulating a sensitive interplay between the maternal immune system and attachment of the rapidly expanding trophoblast for nutrient absorption. The peri-implantation period of rapid trophoblastic elongation followed by attachment to the maternal uterine endometrium is critical for establishing a sufficient placental-uterine interface for subsequent nutrient transport for fetal survival to term, but is also marked by the required conceptus release of factors involved with stimulating uterine secretion of histotroph and modulation of the maternal immune system. Many endometrial genes activated by the conceptus secretory factors stimulate a tightly controlled proinflammatory response within the uterus. A number of the cytokines released by the elongating conceptuses stimulate inducible transcription factors such as nuclear factor kappa B （NFKB） potentially regulating the maternal uterine proinflammatory and immune response. This review will establish the current knowledge for the role of conceptus cytokine production and release in early development and establishment of pregnancy in the pig.

关键词： Cytokines Embryo development Porcine conceptus Pregnancy Prostaglandins uterus

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The price of protection:a defensive endosymbiont impairs nymph growth in the bird cherry-oat aphid,Rhopalosiphum padi

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Insect Science 2020年第1期27卷 69-85页

作者： daniel j.Leyboume jorunn I.B.Bos Tracy A.Valentine Alison j.Karley Division of Plant Sciences School of Life SciencesUniversity of DundeeDundeeU K Cell and Molecular Sciences the James Hutton InstituteInvergowrieDundeeUK Ecological Sciences the James Hutton InstituteInvergowrieDundeeUK

Bacterial endosymbionts have enabled aphids to adapt to a range of stressors,but their effects in many aphid species remain to be *** bird cherry-oat aphid,Rhopalosiphum padi(Linnaeus),is an important pest of cereals worldwide and has been reported to form symbiotic associations with Serratia symbiotica and Sitobion miscanthi L-type symbiont endobacteria,although the resulting aphid phenotype has not been *** study presents the first report of *** infection with the facultative bacterial endosymbiont Hamiltonella *** of *** were sampled from populations in Eastern Scotland,UK,and shown to represent seven *** genotypes based on the size of polymorphic microsatellite markers;two of these genotypes harbored *** parasitism assays,survival of ***-infected nymphs following attack by the parasitoid wasp Aphidius colemani(Viereck)was 5 fold higher than for uninfected *** genotype was a major determinant of aphid performance on two Hordeum species,a modern cultivar of barley *** and a wild relative ***,although aphids infected with *** showed 16%lower nymph mass gain on the partially resistant wild relative compared with uninfected *** findings suggest that deploying resistance traits in barley will favor the fittest *** genotypes,but symbiontinfected individuals will be favored when parasitoids are abundant,although these aphids will not achieve optimal performance on a poor quality host plant.

关键词： cereal aphid Hamiltonella defensa Hordeum spontaneum Hordeum vulgare symbiosis

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Human-Swarm-Teaming Transparency and Trust Architecture

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IEEE/CAA journal of Automatica Sinica 2021年第7期8卷 1281-1295页

作者： Adam j.Hepworth daniel P.Baxter Aya Hussein Kate j.Yaxley Essam Debie Hussein A.Abbass the School of Engineering and Information Technology University of New South WalesCanberraNew South Wales 2612Australia

Transparency is a widely used but poorly defined term within the explainable artificial intelligence *** is due,in part,to the lack of an agreed definition and the overlap between the connected—sometimes used synonymously—concepts of interpretability and *** assert that transparency is the overarching concept,with the tenets of interpretability,explainability,and predictability *** draw on a portfolio of definitions for each of these distinct concepts to propose a human-swarm-teaming transparency and trust architecture(HST3-Architecture).The architecture reinforces transparency as a key contributor towards situation awareness,and consequently as an enabler for effective trustworthy human-swarm teaming(HST).

关键词： Artificial intelligence explainability human-swarm teaming(HST) interpretability predictability swarm shepherding transparency.

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Using tickler chains to promote more environmentally benign trawls in an Australian penaeid fishery

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Aquaculture and Fisheries 2023年第3期8卷 316-322页

作者： Matt.K.Broadhurst daniel j.Tolhurst NSW Department of Primary Industries Fisheries Conservation Technology UnitNational Marine Science CentreSouthern Cross University2 Bay DriveCoffs HarbourNSW2450Australia Marine and Estuarine Ecology Unit School of Biological SciencesUniversity of QueenslandBrisbaneQLD4072Australia The Roslin Institute and Royal(Dick)School of Veterinary Studies University of EdinburghEaster BushMidlothianEH259RGUnited Kingdom

There has been an increasing emphasis on reducing the environmental impacts of penaeid trawls by modifying their anterior *** one Australian estuary,this approach has culminated in a new generic trawl comprising a slightly smaller mesh size,and steeper and shorter side panels than traditional trawls,combined with a top panel extending forwards of the bottom panel(termed‘lead-ahead’)and no headline *** study sought to investigate if an additional simple,cumulative modification(tickler chain)might help promote adoption of the new trawl,via improved penaeid *** volunteer fishers towing pairs of either the traditional or new trawls in double rigs were asked if an observer could accompany fishing trips,and alternately attach a light tickler chain(~3 kg)anterior to the ground gear of one *** of the trawl design,the tickler chains significantly increased the catch weights of penaeids,but relatively more so in the new trawls(by 1.11×vs 1.08×).The tickler chains also significantly increased the number and weight of total bycatch in the traditional trawls(by up to 1.22×),but not in the new trawls-although there were variable species-specific *** terms of total effects,the data support using tickler chains to increase the efficiency of the new trawls and their cumulative benefits,and could be promoted to facilitate broader inter-and intra-fleet adoption.

关键词： Ground-gear Penaeid Selectivity Tickler chain Trawling

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Nonsingularity of Grain-like cascade FSRs via semi-tensor product

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Science China(Information Sciences) 2018年第1期61卷 58-69页

作者： jianquan LU Meilin LI Yang LIU daniel W.C.HO jrgen KURTHS School of Mathematics Southeast University College of Mathematics Physics and Information Engineering Zhejiang Normal University Department of Mathematics City University of Hong Kong Potsdam Institute for Climate Impact Research

In this paper, Grain-like cascade feedback shift registers(FSRs) are regarded as two Boolean networks(BNs), and the semi-tensor product(STP) of the matrices is used to convert the Grain-like cascade FSRs into an equivalent linear equation. Based on the STP, a novel method is proposed herein to investigate the nonsingularity of Grain-like cascade FSRs. First, we investigate the property of the state transition matrix of Grain-like cascade FSRs. We then propose their sufficient and necessary nonsingularity condition. Next,we regard the Grain-like cascade FSRs as Boolean control networks(BCNs) and further provide a sufficient condition of their nonsingularity. Finally, two examples are provided to illustrate the results obtained in this paper.

关键词： Grain-like cascade FSRs Boolean control networks Boolean networks semi-tensor product nonsingularity

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