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The Geese Retum (Excerpt)

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中国翻译 2024年第5期45卷 174-177页

作者： Aldo leopold 不详

[1]One swallow does not make a summer,but one skein of geese,cleaving the murk of a March thaw,is the spring.[2]A cardinal,whistling spring to a thaw but later finding himself mistaken,can retrieve his error by resuming his winter silence.A chipmunk,emerging for a sunbath but finding a blizzard,has only to go back to *** a migrating goose,staking two hundred miles of black night on the chance of finding a hole in the lake,has no easy chance for *** arrival carries the conviction of a prophet who has burned his bridges.

关键词： finding bridges spring

Improved germination of threatened medicinal Prunus africana for better domestication: effects of temperature, growth regulators and salts

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Journal of Forestry Research 2020年第6期31卷 2403-2411页

作者： Justine Germo Nzweundji koffi Konan leopold MNyochembeng Nehemie Donfagsiteli Tchinda Nicolas Niemenak Department of Biological Science Higher Teacher Training CollegeUniversity of Yaounde IPO Box 47Yaounde´Cameroon Centre for Research on Medicinal Plants and Traditional Medicine Institute of Medical Research and Medicinal Plants Studies(IMPM)PO Box 6163Yaounde´Cameroon IngateyGen LLC Elizabeth CityNCUSA Department of Natural Resources and Environmental Sciences Alabama A&M UniversityHunstvilleALUSA

Prunus africana is an endangered medicinal species and has been classified as a priority for domestication in ***,the seeds rapidly lose their viability during storage at room temperature after 2–3 *** study aimed to improve seed germination of *** by germinating at different temperatures(4℃,28℃)using different concentrations of growth stimulators(sodium nitrate and gibberellic acid)and different concentrations of *** seeds had 91.7%germination at 4C after 1 month of *** regulators considerably influenced germination after 6 months and reached 66.0%with 10 mM gibberellic acid and 100%with 10 mM sodium *** three shoots per seed were developed,an indication of *** analyses revealed the presence of protein-like bodies close to the embryo axis and accumulations of starch after 7 days of *** 14 days,amyloplasts and dark protein bodies of various sizes were *** outcome of this study will contribute to improve the germination of *** for better domestication and conservation.

关键词： Conservation Germination Growth regulators Histochemical analyses Prunus africana Temperature

Giant Bursitis of Wrist and Multiple Tenosynovitis of Hand with Rice Body Formation: Unusual Case of an Atypical Mycobacteria Infection

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Open Journal of Rheumatology and Autoimmune Diseases 2016年第3期6卷 45-50页

作者： Kone Samba krah K. leopold Traore Moctar Gbane Mariam koffi Gerard Kouassi Adelaide Ngandeu Astrid Traumatology and Orthopedics Surgery of the University Hospital of Cocody Abidjan Cote d'Ivoire Traumatology and Orthopedics Surgery of the University Hospital of Bouaké Bouaké Cote d’Ivoire Traumatology and Orthopedics Surgery of the University Hospital of Treichville Abidjan Cote d’Ivoire Rheumatology Service of the University Hospital of Cocody Abidjan Cote d’Ivoire

We report an unusual manifestation of nontuberculous mycobacterial infection characterized by a giant bursitis on wrist and multiple tenosynovitis with many rice bodies formations. The clinical and radiological examinations are neither rather sensitive nor rather specific. The nuclear imagery of rice bodies formations provides elements of guidance. Cause of absence of the germ isolation, diagnosis was retained on probability items based on a suspicion of arguments beam: clinical, biological, bacteriological and histological. The patient was treated with medical and surgical procedure and provided a satisfactory evolution. At follow-up of 15 months, there were no clinical signs of local recurrence. Through a literature review, the problem of diagnosis of certainty will be discussed.

关键词： Rice Body Formations Nontuberculous Mycobacteria Tenosynovitis Bursitis Hand

High-speed silicon photonic electro-optic Kerr modulation

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Photonics Research 2024年第1期12卷 51-60页

作者： JONATHAN PELTIER WEIWEI ZHANG leopold VIROT CHRISTIAN LAFFORGUE LUCAS DENIEL DELPHINE MARRIS-MORINI GUY AUBIN FARAH AMAR DENH TRAN XINGZHAO YAN CALLUM G.LITTLEJOHNS CARLOS ALONSO-RAMOS KE LI DAVID J.THOMSON GRAHAM REED LAURENT VIVIEN University Paris-Saclay CNRSCentre for Nanoscience and Nanotechnology(C2N)Palaiseau 91120France University Grenoble Alpes CEALETIGrenoble 38000France Optoelectronics Research Centre Zepler Institute for Photonics and NanoelectronicsFaculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK

Silicon-based electro-optic modulators contribute to easing the integration of high-speed and low-power consumption circuits for classical optical communications and data *** the plasma dispersion modulation,an alternative solution in silicon is to exploit the DC Kerr effect,which generates an equivalent linear electro-optical effect enabled by applying a large DC electric *** some theoretical and experimental studies have shown its existence in silicon,limited contributions relative to plasma dispersion have been achieved in high-speed modulation so *** paper presents high-speed optical modulation based on the DC Kerr effect in silicon PIN *** contributions of both plasma dispersion and Kerr effects have been analyzed in different waveguide configurations,and we demonstrated that the Kerr induced modulation is dominant when a high external DC electric field is applied in PIN ***-speed optical modulation response is analyzed,and eye diagrams up to 80 Gbit/s in NRZ format are obtained under a *** of 30 *** work paves the way to exploit the Kerr effect to generate high-speed Pockels-like optical modulation.

关键词： waveguide dispersion effect

Recent status of fluidized bed technologies for producing iron input materials for steelmaking

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Particuology 2011年第1期9卷 14-23页

作者： Johannes leopold Schenk Department of Metallurgy University of Leoben Franz-Josef-Straβe 18 A-8700 Leoben Austria

Today steel is produced by two steelmaking processes, the basic oxygen furnace and the electric arc furnace, Three types of iron input materials for both processes are liquid hot metal or in solidified form as pig iron, direct reduced iron （DRI） and hot briquetted iron （HB1） as well as steel scrap. Hot metal, pig iron, DRI and HBI are virgin iron materials, which have to be produced from iron ore by the so-called ironmaking technologies. New ironmaking processes based on fluidized bed technology have been developed in the last two decades. The main advantage of these technologies is that fine ore can be directly used in the processes and prior treatment such as sintering or pelletizing can be avoided which is required for the established processes. Theoretical aspects for reduction of fine iron oxides in a fluidized bed reactor system will be explained. The fluidized bed reducing technologies utilized in the most advanced new ironmaking processes for direct use of fine ore, FINMET, Circored, FINEX~ and Hismelt will be compared.

关键词： FINEX  Circored  FINMET  HIsmelt  Fluidized bed Reactor Fine iron ore Ironmaking

Improvement on straightness of metal bar based on straightening stroke-deflection model

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Science China(Technological Sciences) 2009年第7期52卷 1866-1873页

作者： leopold Juergen Fraunhofer Institute for Machine Tools and Forming Technology Chemnitz Germany

The straightening technics is one of important means to improve the straightness of metal bar. A novel way of predicting the straightening stroke is proposed based on mathematical methods and bending experimental and numerical simulation. The experimental and numerical simulation is conducted by following the mathematical load-stroke model of press straightening process under the elastic-plastic theory. For the linear guide rails, as an example, the stroke-deflection model focusing on the straightening stroke prediction can be achieved by contrasting and integrating the bending experimental results and finite element methods (FEM) simulation data. And then the formula for predicting the straightening stroke is presented based on the precise straightening stroke-deflection model. The stroke prediction formula with high precision can be applied to the straightening stroke prediction in the high straightness metal bar manufacturing process and automatic straightening machine conveniently.

关键词： straightness straightening stroke deflection stroke prediction metal bar

Treatment of Neglected Elbow Dislocations by Z-Lengthening of the Triceps Brachii

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Open Journal of Orthopedics 2022年第4期12卷 142-152页

作者： M’Bra Kouamé Innocent Kouassi Kouamé Jean-Eric Yao Loukou Blaise AkobéJean Regis Achie Sery Bada Justin Léopold KouassiAya Adélaïde Natacha krah koffi leopold Michel Kodo Traumatology and Orthopedics Surgery of the University Hospital of Bouaké Bouaké C&ocirc te d’Ivoire

Introduction: Neglected elbow dislocations are much more common in developing and underdeveloped countries. The main reason for the delay in diagnosis is that patients initially seek treatment from traditional healers. These will immobilize the elbow in extension, which will lead to the retraction of the triceps muscle and collateral ligaments. Patients and Method: We carried out a prospective study over five years (2014-2019). The study involved patients with unreduced elbow dislocation older than 21 days. All patients with a dislocated fracture and those whose x-ray showed joint fusion were not included in the study. We collected 26 patients, 20 men and 6 women with an average age of 27.5 years (17 and 45 years). The average consultation time was 8.9 months (3 - 13). The approach was posterior about 8 cm above the olecranon and 2 cm below the olecranon, the ulnar nerve was identified and isolated. The triceps tendon was cut in a Z from its myotendin junction to the beak of the olecranon, and then lengthened. Results: The patients were reviewed after a mean follow-up of 24 months (12 - 36). The Mayo Clinic’s average elbow performance index was 77.1 (60 - 85), with 19 good and 6 average results. The mean flexion was 114°(100°- 135°) and the mean extension deficit was 31.15°(10°- 55°). The average range of motion was 82.5°(60°- 120°). We did not find a correlation between the duration of the lesion and functional recovery (p > 0.05). The Wilcoxon test showed that surgery significantly improved the overall range of motion of the elbow (p = 0.001). Discussion: Based on this study, open reduction with tendon lengthening should remain a treatment option regardless of the age and chronicity of the dislocation.

关键词： Elbow Dislocation Neglected Triceps Plasty Posterior Approach

Hybrid LES/URANS Simulation of Rayleigh-Bénard Convection Using BEM

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Computer Modeling in Engineering & Sciences 2020年第4期123卷 1-22页

作者： Primož Kocutar Jure Ravnik leopold Škerget Faculty of Mechanical Engineering University of MariborSmetanova 17SI-2000 MariborSlovenia

In this paper,we develop and test a unified hybrid LES/URANS turbulence model with two different Large Eddy Simulation(LES)turbulence *** numerical algorithm is based on the Boundary Element *** the existing hybrid LES/URANS turbulence model we implemented a new Smagorinsky LES turbulence *** hybrid LES/URANS turbulence model is unified,which means that the LES/URANS interface is changed dynamically during simulation using a physical *** order to define the interface between LES and unsteady Reynolds Averaged Navier Stokes(URANS)zones during the simulation,we use the Reynolds number based on turbulent kinetic energy as a switching *** means that the flow characteristics define where the sub-grid scale or URANS effective viscosity and thermal conductivity are used in the governing equations in the next time *** unified hybrid turbulence models,only one set of governing equations is used for LES and URANS *** developed hybrid LES/URANS model was tested on non-isothermal,unsteady and turbulent Rayleigh-Bénard Convection and compared with an existing model,where LES is based on turbulent kinetic *** hybrid turbulence model was implemented within a numerical algorithm based on the Boundary-Domain Integral Method,where a single domain and sub-domain approaches were *** numerical algorithm uses governing equations written in a velocity-vorticity *** false transient time scheme is used for the kinematics equation.

关键词： Boundary-domain integral method hybrid LES-RANS turbulent fluid flow heat transfer Rayleigh-Bénard Convection

Modelling and simulation of fixtures during grinding

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Science China(Technological Sciences) 2009年第7期52卷 1821-1829页

作者： Matthias KLAERNER Juergen leopold Lothar KROLL Institute of Mechanical and Polymer Engineering Chemnitz University of Technology09107 ChemnitzGermany Fraunhofer Institute for Machine Tools and Forming Technology 09126 ChemnitzGermany

The complex workpiece-fixture behaviour during machining is an essential component of the fixture development *** detail,the forces acting on fixture components have to be analysed.A method for the prediction of the reaction forces due to process and clamping loads is presented in this *** the beginning,detailed information about the workpiece-fixture behaviour during the process is determined by a complex finite element ***,the reduction of the number of elements leads to a smaller model with less computation time,validated and used for the variation of process ***,an analytical description is developed based on the combination of both *** the help of the empiric equation it is possible to predict the reaction forces and the dependency on several process *** method has been validated by modelling shape grinding of a nozzle guide vane.

关键词： clamping forces grinding finite element method fixture