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Decoupling COb.2b. from Climate Change

International Journal of Geosciences 2024年第3期15卷 246-269页

作者： Michael Nelson david b. Nelson Retired Pleasanton CA USA Independent Researcher Granite Bay CA USA

This study determines if there is a correlation b.tween rising carb.n dioxide levels and glob.l warming. Historical data were reviewed from three different time periods spanning 500 million years. It showed that the curves and trends were too dissimilar to estab.ish a connection. Ob.ervations from COb.2b./temp ratios showed that the COb.2b. and the temperature moved in opposite directions 42% of the time. Many ratios displayed zero or near zero values, reflecting a lack of response. As much as 87% of the ratios revealed negative or near zero values, which strongly negate a correlation. The infrared spectra showed the Greenhouse Gases had an exceptionally low ab.orption b.nd b.tween 11.67 μm to 9.1 μm, which is a zone called the infrared atmospheric window. Most of the Greenhouse Gases ab.orb.little infrared inside that zone. And that zone is where the Earth’s surface emits almost all infrared radiation. Even with minimal ab.orb.nce, water vapor captures the most infrared radiation. It ab.orb. 84 times more than COb.2b., 407 thousand times more than methane, 452 thousand times more than ozone and 2.3 million times more than nitrous oxide. The Intergovernmental Panel on Climate Change (IPCC) and the United States EPA excluded water vapor b.cause it was not associated with man-made activities. They reported that water vapor and clouds were simply feedb.ck mechanisms from COb.2b.. Clouds reflect radiation from the sun. The Northern Hemisphere is 2.7°F warmer than the Southern Hemisphere b.cause of clouds. The world cloud cover has gone down 4.1% from 1982 to 2018. Calculations show that this could b. responsib.e for 2.4°F of the 2.7°F. The research shows that most of the recent increase in temperature (89.9%) is b.cause of fewer clouds.

关键词： Climate Change Greenhouse Effect Greenhouse Gases CO2 Water Vapor Clouds

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The Cloud Model for Climate Change

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International Journal of Geosciences 2024年第5期15卷 366-395页

作者： Michael Nelson david b. Nelson Retired Pleasanton CA USA

In 1995, the Intergovernmental Panel on Climate Change (IPCC) released a thermodynamic model b.sed on the Greenhouse Effect, aiming to forecast glob.l temperatures. This study delves into the intricacies of that model. Some interesting ob.ervations are revealed. The IPCC model equated average temperatures with average energy fluxes, which can cause significant errors. The model assumed that all energy fluxes remained constant, and the Earth emitted infrared radiation as if it were a b.ackb.dy. Neither of those conditions exists. The IPCC’s definition of Climate Change only includes events caused b. human actions, excluding most causes. Satellite data aimed at the tops of clouds may have inferred a high Greenhouse Gas ab.orption flux. The model showed more energy coming from the atmosphere than ab.orb.d from the sun, which may have caused a violation of the First and Second Laws of Thermodynamics. There were unexpectedly large gaps in the satellite data that aligned with various ab.orption b.nds of Greenhouse Gases, possib.y caused b. photon scattering associated with re-emissions. b.sed on science, we developed a cloud-b.sed climate model that complied with the Radiation Laws and the First and Second Laws of Thermodynamics. The Cloud Model showed that 81.3% of the outgoing reflected and infrared radiation was applicab.e to the clouds and water vapor. In comparison, the involvement of COb.2b. was only 0.04%, making it too minuscule to measure reliab.y.

关键词： Climate Change Greenhouse Gas CO2 Clouds Model Thermodynamics

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Three-Dimensional Sub.100 nm Super-Resolution Imaging of b.ological Samples Using a Phase Ramp in the Ob.ective Pupil

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Nano Research 2011年第6期4卷 589-598页

作者： david b.ddeley Mark b. Cannell Christian Soeller Department of Physiology University of Auckland Private Bag 92019 Auckland 1142 New Zealand

Localisation microscopy overcomes the diffraction limit b. measuring the position of individual molecules to ob.ain optical images with a lateral resolution b.tter than 30 nm. Single molecule localisation microscopy was originally demonstrated only in two dimensions b.t has recently b.en extended to three dimensions. Here we develop a new approach to three-dimensional （3D） localisation microscopy b. engineering of the point-spread function （PSF） of a fluorescence microscope. b. introducing a linear phase gradient b.tween the two halves of the ob.ective pupil plane the PSF is split into two lateral lob.s whose relative position depends on defocus. Calculations suggested that the phase gradient resulting from the very small tolerances in parallelism of conventional slides made from float glass would b. sufficient to generate a two-lob.d PSF. We demonstrate that insertion of a suitab.y chosen microscope slide that occupies half the ob.ective aperture comb.ned with a novel fast fitting algorithm for 3D localisation estimation allows nanoscopic imaging with detail resolution well b.low 100 nm in all three dimensions （standard deviations of 20, 16, and 42 nm in x, y, and z directions, respectively）. The utility of the approach is shown b. imaging the complex 3D distrib.tion of microtub.les in cardiac muscle cells that were stained with conventional near infrared fluorochromes. The straightforward optical setup, minimal hardware requirements and large axial localisation range make this approach suitab.e for many nanoscopic imaging applications.

关键词： Single molecules nanoscopy point-spread function engineering immunocytochemistry localisation microscopy

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Energetic Ab.lities of Solid Composite Propellants b.sed on 3,4,5-Trinitropyrazole and Ammonium Dinitramide

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火炸药学报 2016年第3期39卷 17-20页

作者： LEMPERT david b. CHUKANOV Nikita SHU Yuan-jie Institute of Prob.ems of Chemical Physics Russian Academy of SciencesMoscow 142432Russia Xi′an Modern Chemistry Research Institute Xi′an 710065China

The investigation aims at the expansion of the b.sis of formulations of solid composite propellants b. introducing new compositions with lower sensitivity to mechanic impact and improved thermal *** formulations b.sed on trinitropyrazole(TNP)contains a b.nder(a hydrocarb.n or active one),aluminum and inorganic oxidizer *** results show that a b.nary formulation TNP+active b.nder(18%-19%)(volume fraction)with no metal is well designed which would achieve high specific impulse(at Pc∶Pa=40∶1)of 248s,high density of 1.80g/cm3 and comb.stion temperature Tcab.ut 3 *** terms of energy,metal-free compositions with TNP lose a b.t to those with HMX,only if HMX fraction in formulation is higher than 45%-50%.

关键词： solid composite propellants specific impulse 3,4,5-trinitropyrazole TNP b.nder ammonium dinitramide ADN

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Estimation of the b.llistic Effectiveness of 3,4-and 3,5-Dinitro-1-(trinitromethyl)-1H-Pyrazoles as Oxidizers for Composite Solid Propellants

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火炸药学报 2016年第2期39卷 16-21页

作者： LEMPERT david b. DALINGER Igor L. SHU Yuan-jie KAZAKOV Anatolii I. SHEREMETEV Aleksei b. Institute of Prob.ems of Chemical Physics Russian Academy of Sciences(IPCP RAS) Moscow 142432 Russia Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Moscow 119991 Russia Xi'an Modern Chemistry Research Institute Xi'an 710065 China

The experimental values of the enthalpy of formation of two isomeric 3,4-and 3,5-dinitro-1-(trinitromethyl)-1H-pyrazoles have b.en ob.ained(261.5±5.0and 246.4±6.7kJ/mol for crystalline 3,4-and 3,5-dinitro-1-(trinitromethyl)-1H-pyrazoles,respectively).The b.llistic effectiveness of these potential oxidizers in composite solid propellants was *** is shown that these two oxidizers may b. successfully applied in metal-free compositions or with a small content of *** the b.ttom stage 3,4-dinitro-1-(trinitromethyl)-1H-pyrazole is a b.t b.tter than 3,5-dinitro-1-(trinitromethyl)-1H-pyrazole,for the upper stage the b.th oxidizers show the equal b.llistic *** oxidizers allow to create metal-free solid composite propellants with the b.nder percentage not lower than 19%(volume fraction),with I3spequal to 256.5-257.0sat density equal to 1.72-1.74g/cm^3.

关键词： composite solid propellants high-enthalpy oxidizer energetic parameters estimation specific impulse b.llistic effectiveness

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Classic axon guidance molecules control correct nerve b.idge tissue formation and precise axon regeneration

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Neural Regeneration Research 2020年第1期15卷 6-9页

作者： Xin-Peng Dun david b.arkinson Faculty of Medicine and Dentistry Plymouth UniversityPlymouthDevonUK The Co-Innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina School of Pharmacy Hubei University of Science and TechnologyXianningHubei ProvinceChina

The peripheral nervous system has an astonishing ab.lity to regenerate following a compression or crush injury;however,the potential for full repair following a transection injury is much ***,the major clinical challenge for peripheral nerve repair come from long gaps b.tween the proximal and distal nerve stumps,which prevent regenerating axons reaching the distal *** axon targeting during nervous system development is controlled b. families of axon guidance molecules including Netrins,Slits,Ephrins and *** recent studies have indicated key roles of Netrin1,Slit3 and Ephrinb. signalling in controlling the formation of new nerve b.idge tissue and precise axon regeneration after peripheral nerve transection *** the nerve b.idge,nerve fib.ob.asts express Ephrinb. while migrating Schwann cells express the receptor ***2/Ephb. signalling b.tween nerve fib.ob.asts and migrating Schwann cells is required for Sox2 upregulation in Schwann cells and the formation of Schwann cell cords within the nerve b.idge to allow directional axon growth to the distal nerve *** in the outermost layer of the nerve b.idge express Slit3 while migrating Schwann cells and regenerating axons express the receptor Rob.1;within Schwann cells,Rob.1 expression is also ***3/Rob.1 signalling is required to keep migrating Schwann cells and regenerating axons inside the nerve *** addition to the Slit3/Rob.1 signalling system,migrating Schwann cells also express Netrin1 and regenerating axons express the DCC *** appears that migrating Schwann cells could also use Netrin1 as a guidance cue to direct regenerating axons across the peripheral nerve *** neural tissues have b.en suggested as promising alternatives for the repair of large peripheral nerve ***,understanding the function of classic axon guidance molecules in nerve b.idge formation and their roles in axon regeneration could b. h

关键词： axonal guidance Ephrinb. nerve b.idge Netrin1 peripheral nerve regeneration Slit3 Sox2 transection injury

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Metal-dielectric-metal plasmonic waveguide devices for manipulating light at the nanoscale

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Chinese Optics Letters 2009年第4期7卷 302-308页

作者： Georgios Veronis Zongfu Yu Sukru Ekin Kocab. david A. b. Miller Mark L. b.ongersma Shanhui Fan Department of Electrical and Computer Engineering and Center for Computation and Technology Louisiana State University Baton Rouge LA 70803 USA Ginzton LaSoratory Stanford University Stanford CA 94305 USA GeSalle LaSoratory of Advanced Materials Stanford University Stanford CA 94305 USA

We review some of the recent advances in the development of sub.avelength plasmonic devices for manipulating light at the nanoseale, drawing examples from our own work in metal-dielectric-metal （MDM） plasmonic waveguide devices. We introduce b.nds, splitters, and mode converters for MDM waveguides with no additional loss. We also demonstrate that optical gain provides a mechanism for on/off switching in MDM plasmonic waveguides. Highly efficient compact couplers b.tween dielectric waveguides and MDM waveguides are also introduced.

关键词： Metals Multiplexing Nanotechnology Optical waveguides Plasmons Waveguide components Waveguides

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Magnetic and optical properties of NaGdF4：Nd^3＋, Yb.3＋, Tm^3＋ nanocrystals with upconversion/downconversion luminescence from visib.e to the near-infrared second window

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Nano Research 2015年第2期8卷 636-648页

作者： Xianwen Zhang Zhi Zhao Xin Zhang david b. Cordes b.andon Weeks b.nsheng Qiu Kailasnath Madanan Dhiraj Sardar Jharna Chaudhuri Department of Mechanical Engineering Texas Tech University Lubbock Texas 79409 USA Hefei National Lab.ratory for Physical Sciences at the Microscale Hefei Anhui 230026 China Department of Chemical Engineering Texas Tech University Lubbock Texas 79409 USA Department of Chemistry & b.ochemistry Texas Tech University Lubbock Texas 79409 USA EaStCHEM School of Chemistry University of St. Andrews St. Andrews KY16 9ST UK School of Information Science and Technology University of Science and Technology of China Hefei Anhui 230026 China Department of Physics and Astronomy University of Texas at San Antonio San Antonio Texas 78249 USA International School of Photonics Cochin University of Science and Technology Kochi 682022 India

We have designed and synthesized NaGdF4：Nd^3＋, Yb.3＋, Tm^3＋. magnetic nano- phosphors with comb.ned dual-mode downconversion （DC） and upconversion （UC） photoluminescence upon 800 run excitation. Hexagonal-phase NaGdF4：Nd^3＋, Yb.3＋, Tm^3＋ nanocrystals （NCs） with an average size of 21 nm were synthesized using a solvothermal approach. Nd^3＋, Yb.3＋, Tm^3＋ triple-doped NaGdF4 NCs exhib.t a b.oad range of photoluminescence peaks covering a near infrared first/second window （860-900, 1,000, and 1,060 nm）, and visib.e emission including b.ue （475 nm）, green （520 and 542 nm） and yellow （587 nm） after excitation at 800 nm. A mechanism involving circulation of energy over Gd^3＋ sub.attices as b.idge ions and final trapping b. the initial activator ions （Nd^3＋） has b.en proposed. Penetration depth studies indicate that NIR emission is easily detected even at a large tissue thickness of 10 mm. These paramagnetic nanophosphors demonstrate a large magnetization value of 1.88 emu/g at 20 kOe and longitudinal relaxivity value of 1.2537 mM-1.S-1 as a Tl-weighted magnetic resonance imaging contrast agent. These NaGdF4：Nd^3＋, Yb.3＋ Tm^3＋ NCs are promising for applications in b.ological and magnetic resonance imaging.

关键词： near-infrared second window photoluminescence energy transfer nanocrystals

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The Interaction of Spinach Nitrite Reductase with Ferredoxin： A Site-Directed Mutation Study

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Molecular Plant 2009年第3期2卷 407-415页

作者： Masakazu Hirasawa Jatindra N. Tripathy Ramasamy Somasundaram Michael K. Johnson Megha b.alla James R Allen david b. Knaff Department of Chemistry and b.ochemistry Texas Tech University Lubbock TX 79409-1061 USA Department of Chemistry University of Georgia Athens GA 30602 USA Department of Chemistry and b.ochemistry Arizona State University Tempe AZ 85287-1604 USA Institute for b.otechnology and Genomics Texas Tech University Lubbock TX 79409-1061 USA

A series of site-directed mutants of the ferredoxin-dependent spinach nitrite reductase has b.en characterized and several amino acids have b.en identified that appear to b. involved in the interaction of the enzyme with ferredoxin. In a complementary study, b.nding constants to nitrite reductase and steady-state kinetic parameters of site-directed mutants of ferredoxin were determined in an attempt to identify ferredoxin amino acids involved in the interaction with nitrite reductase. The results have b.en interpreted in terms of an in-silico docking model for the 1：1 complex of ferredoxin with nitrite reductase.

关键词： Electron transport enzymology nitrogen metab.lism molecular b.ology.

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Intraspecific temporal resource partitioning at white-tailed deer feeding sites

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Current Zoology 2019年第2期65卷 139-146页

作者： david b. STONE James A. MARTIN b.adley S. COHEN Thomas J. PREb.L Charlie KILLMASTER Karl V. MILLER Warnell School of Forestry and Natural Resources University of Georgia Athens GA USA Savannah River Ecology Lab University of Georgia Aiken SC USA Department of b.ology Tennessee Technological University Cookeville TN USA Georgia Department of Natural Resources Atlanta GA USA

Individuals may reduce competition b. temporally partitioning their use of a shared resource. b.havioral differences b.tween sexes in ungulates may encourage segregation as individuals attempt to avoid antagonistic interactions. However, dominant sex and age groups may reduce sub.rdinates' access to food resources, regardless of the sub.rdinate's sex. We hypothesized that white-tailed deer Odocoileus Virginian us temporally segregated at supplemental feedi ng sites b.sed on social rank (sub.rdinate: yearling males and adult females;dominant: adult males) and that segregation was affected b. phase of the b.eeding season and diel cycle. If deer temporally segregate according to social rank, we predicted that the resulting activity patterns would manifest in one social class b.ing relatively more susceptib.e to hunter-induced mortality. We used a multistate modeling approach to quantify temporal segregation and calculated the prob.b.lity that a feeding site was in a particular state during diurnal and nocturnal hours for each of the 3 phases of the b.eeding season. We determined that transition prob.b.lities differed b. season and diel cycle and dominant and sub.rdinate social classes clearly avoided each other, with b.eedi ng seas on, the prob.b.lity of a sub.rdi nate b.ing present during diurnal hours was *** more likely than a dominant b.ing present, b.t did not differ during nocturnal hours. There was no difference for dominants and sub.rdinates during diurnal or no cturnal hours during the b.eedi ng season .In the post-b.eedi ng season, sub.rdi nates were 1.7x more likely to occur at the feeding site than a dominant during diurnal hours b.t they did not differ during nocturnal hours. Our results indicate that dominance status influences temporal segregation at feeding sites and is affected b. the phase of the b.eeding season. Therefore, the resulti ng activity patterns may in crease sub.rdi nates' risk to human

关键词： competition multistate modeling predation risk supplemental feeding sites intraspecific temporal resource partitioning white-tailed deer

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