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Longwave infrared multispectral image sensor system using aluminum-germanium plasmonic filter arrays Noor e

Nano Research 2023年第7期16卷 10018-10025页

作者： Karishma Shaik Bryce Widdicombe Dechuan Sun sam e john Dongryeol Ryu Ampalavanapillai Nirmalathas Ranjith R Unnithan Department of electrical and electronic engineering University of MelbourneParkvilleVIC 3010Australia Department of Biomedical engineering University of MelbourneParkvilleVIC 3010Australia Department of Infrastructure engineering University of MelbourneParkvilleVIC 3010Australia

A multispectral camera records image data in various wavelengths across the electromagnetic spectrum to acquire additional information that a conventional camera fails to *** the advent of high-resolution image sensors and color filter technologies,multispectral imagers in the visible wavelengths have become popular with increasing commercial viability in the last ***,multispectral imaging in longwave infrared(LWIR,8-14μm)is still an emerging area due to the limited availability of optical materials,filter technologies,and high-resolution *** from LWIR multispectral cameras can capture emission spectra of objects to extract additional information that a human eye fails to capture and thus have important applications in precision agriculture,forestry,medicine,and object *** this work,we experimentally demonstrate an LWIR multispectral image sensor with three wavelength bands using optical elements made of an aluminum(Al)-based plasmonic filter array sandwiched in germanium(Ge).To realize the multispectral sensor,the filter arrays are then integrated into a three-dimensional(3D)printed wheel stacked on a low-resolution monochrome thermal *** prototype device is calibrated using a blackbody and its thermal output has been enhanced with computer vision *** applying a state-of-theart deep learning method,we have also reconstructed multispectral images to a better spatial ***,our work demonstrates a versatile spectral thermography technique for detecting target signatures in the LWIR range and other advanced spectral analyses.

关键词： infrared plasmonics germanium(Ge) aluminum(Al) thermal optics longwave infrared(LWIR)multispectral system

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Search for a natural scientific measure of economy

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Frontiers of environmental Science & engineering 2011年第1期5卷 111-118页

作者： john e COULTeR Xiwangzhuang Shuangqing RdHaidianBeijing 100084China

Through human history,wealth has been measured in grain,gold,and,now,*** counterfeiting of coins and notes goes back a long way,it is only with electronic financial accounting in a global economy tainted by toxic loans and imaginary funds that there is an urgency to search for a realistic objective way to monitor and regulate what we are doing to our earth and *** schemes using analysis of utility functions,oil equivalents,entropy,energy,and other units have been tried and,while helping to understand some basic processes and flows,have always been swamped by the machinations of financiers and the attention big sums of money ***,the concept of exergy,pioneered in eastern europe in the 1950s,is being researched,developed,and applied,especially in China,driven by the desperation to measure the reality beyond the twin specters of global financial and environmental crises.A rough inventory of the matter in the biosphere at the coordinate details of an angstrom and an appreciation of how humans harness and manipulate electromagnetic forces can be enlightening as to what is and is not *** that understanding,any financial estimate and proposed stimulus packages or IMF reform will be wildly wrong and may even be headed in the wrong direction.

关键词： climate change financial crisis energy exergy environment

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Development of Light Weight Structures to Provide Blast-Resistant Designs

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Transactions of Tianjin University 2006年第B09期12卷 16-21页

作者： CRAWFORD john e Karagozian & Case 2550 N.Hollywood Way #500BurbankCA 91505USA

In the past, blast-resistant designs for structures were often constructed with massive type structural systems, which relied more on brute strength than on finesse to achieve the required blast resistance. However, structures composed of COLD-FORMeD steel components, such as sheet metal and metal studs, have shown great promise in providing blast resistance with the added benefits of low cost and ease of construction. Some examples of using such structures to provide containment for package handling facilities (PHF) are described in the paper for situations where blast containment is needed, such as a potential package bomb being discovered during the package vetting process. Results from tests and analytic data are used to illustrate aspects of design peculiar to such types of applications. Designs for specific capacities of PHF are described.

关键词： blast containment package handling facility hardened design light weight structures COLD-FORMeD steel structures

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Simulation of Fragment Impact on Multi-Layer Targets Using Contact Method

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Transactions of Tianjin University 2006年第B09期12卷 152-157页

作者： CRAWFORD john e Karagozian & Case 2550 N.Hollywood WaySuite 500BurbankCA 91505USA

Cased explosives generate highly energetic fragments as their casing breaks up. Due to the complexity of casing fragment related behavior such as embedment, perforation and ricochet, it may be insufficient to use equivalent triangular pressure loading in fragment impact simulations. This simplified method may over- or under-predict the target response. Recently, a procedure using contact techniques has been proposed to overcome such difficulties. It has been shown that the new method has the inherent capability in modeling the multi-piece and multi-hit fragment impact problems in a more realistic way. To investigate the applicability of the proposed method to simulations involving multi-layer penetration, the selected problems of fragment impact on multi-layer targets are described in this paper. It is demonstrated that this method is capable of predicting the complicated multi-layer structural response caused by fragment impact and penetration. Modeling procedures and some technical issues are also discussed.

关键词： contact finite element fragment impact multi-layer penetration simulation

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element Analysis of Instrumented Sharp Indentations into Pressure-sensitive Materials

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Journal of Materials Science & Technology 2007年第2期23卷 277-282页

作者： Minh-Quy Le Seock-sam KIM Department of Mechanics of Materials & Structures Faculty of Mechanical EngineeringHanoi University of TechnologyDai Co Viet RoadHanoi Vietnam School of Mechanical engineering Kyungpook National UniversityDaegu 702-701South Korea

Finite element analysis was carried out to investigate the conical indentation response of elastic-plastic solids within the framework of the hydrostatic pressure dependence and the power law strain hardening. A large number of 40 difierent combinations of elasto-plastic properties with n ranging from 0 to 0.5 and σy/e ranging from 0.0014 to 0.03 were used in the computations. The loading curvature C and the average contact pressure Pave were considered within the concept of representative strains and the dimensional *** functions associated with these two parameters were formulated for each studied value of the pressure sensitivity. The results for pressure sensitive materials lie between those for Von Mises materials and the elastic model.

关键词： Finite element analysis Indentation Mechanical Properties Pressure-sensitive materials

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SWITCHING AND SeQUeNCING AVAILABLe THeRAPIeS SO AS TO MAXIMIZe A PATIeNT＇S eXPeCTeD TOTAL LIFeTIMe

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International Journal of Biomathematics 2012年第4期5卷 113-125页

作者： john e. GOULIONIS Department of Statistics and Insurance Science University of Piraeus 80 Karaoli a Dimitriou Street 18534 Piraeus Greece

This paper has focused on applying mathematical techniques to address fundamental question in therapy planning when to switch, and how to sequence therapies. We consider switching and sequencing available therapies so as to maximize a patient＇s expected total lifetime. We assume knowledge only about the lifetime distributions induced by the therapies. We discuss a specialization of this model that is tailored to a frequently reoccurring type of management problem, where our goal is to determine the best timing for testing and treatment decisions for patients with ischemic heart disease. Typically, decisions are made with an overall, goal of maximizing the patient＇s expected lifetime or quality-adjusted lifetime.

关键词： expected total lifetime maintenance ischemic heart disease stochasticordering relationships statistical distributions.

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The influence of habitat heterogeneity and latitude on gamma diversity of the Nearctic Simuliidae, a ubiquitous group of stream-dwelling insects

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Insect Science 2018年第4期25卷 712-720页

作者： john W. McCreadie Rachel H. Williams sam Stutsman Debra S. Finn Peter H. Adler Department of Biology University of South Alabama Mobile Alabama USA Department of earth Sciences Biology University of South Alabama Mobile Alabama USA Department of Integrative Biology Oregon State University Corvallis Oregon USA Department of Plant and environmental Sciences Clemson University Clemson South Carolina USA

Among the most prominent, large-scale patterns of species richness are the increases in richness with decreasing latitude and with increasing habitat heterogeneity. Using the stream-dwelling larval and pupal stages of North American black flies （Diptera： Simuliidae）, we address 3 broad questions about species richness：（i） Does a significant latitude-richness relationship exist？（ii） How does habitat heterogeneity influence gamma diversity？（iii） What is the sign （positive or negative） of the latitude-richness and the heterogeneity-richness relationships？ We found no evidence that habitat heterogeneity influences gamma diversity. The estimated peak species richness for black flies in North America was at 50-53°N, which also corresponds with peak generic richness. All plesiomorphic, extant lineages of the Simuliidae in the Western Hemisphere are found in cool mountainous environments of North America, suggesting that peak richness at 50-53°N might be a signature of this phylogenetic pattern and a reflection of underlying historical processes

关键词： aquatic insects biodiversity gamma richness North America Simuliidae streams

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A FAST LAGRANGIAN SIMULATION MeTHOD FOR FLOW ANALYSIS AND RUNNeR DeSIGN IN PeLTON TURBINeS

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Journal of Hydrodynamics 2012年第6期24卷 930-941页

作者： ANAGNOSTOPOULOS john S. PAPANTONIS Dimitris e. School of Mechanical engineering National Technical University of Athens

In the present work, an alternative numerical methodology is developed for a fast and effective simulation and analysis of the complex flow and energy conversion in Pelton impulse hydro turbines. The algorithm is based on the Lagrangian approach and the unsteady free-surface flow during the jet-bucket interaction is simulated by tracking the trajectories of representative fluid particles at very low computer cost. Modern regression tools are implemented in a new parameterization technique of the inner bucket surface. Key-feature of the model is the introduction of additional terms into the particle motion equations to account for various hydraulic losses and the flow spreading, which are regulated and evaluated with the aid of experimental data in a Laboratory Pelton turbine. The model is applied to study the jet-runner interaction in various operation conditions and then to perform numerical design optimization of the bucket shape, using a stochastic optimizer based on evolutionary algorithms. The obtained optimum runner attains remarkably higher hydraulic efficiency in the entire load range. Finally, a new small Pelton turbine （150 kW） is designed, manufactured and tested in the Laboratory, and its performance and efficiency verify the model predictions.

关键词： Pelton turbine hydraulic efficiency Lagrangian simulation bucket shape parameterization numerical design optimization

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Dabigatran etixilate and traumatic brain injury: evolving anticoagulants require evolving care plans

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World Journal of Clinical Cases 2014年第8期2卷 362-366页

作者： sam Pakraftar Daniela Atencio john english Alain Corcos eric M Altschuler Kurt Stahlfeld Department of Surgery UPMC MercyPittsburghPA 15219United States Department of Trauma and Acute Care Surgery UPMC MercyPittsburghPA 15219United States Department of Neurosurgery UPMC MercyPittsburghPA 15219United States

AIM: To investigate the outcomes of trauma patients with traumatic brain injury(TBI) on Dabigatran etexilate(De). MeTHODS: Following IRB approval, all patients taking De who were admitted to our level 1 trauma service were enrolled in the study. Injury complexity, length of stay(LOS), intensive care length of stay, operative intervention, therapeutic interventions and outcomes were analyzed retrospectively. ReSULTS: Twenty-eight of 4310 admissions were taking De. eleven patients were excluded on concurrent antiplatelet therapy. Average age was 77.14 years(64-94 years), and average LOS was 4.7 d(1-35 d). Thirty-two percent were admitted with intracranial hemorrhage. eighteen percent received factor Ⅶ, and 22% received dialysis in attempts to correct coagulopathy. Mortality was 21%.CONCLUSION: The low incidence, absence of reversal agents, and lack of practice guidelines makes managing patients with TBI taking De frustrating and provider specific. Local practice guidelines may be helpful in managing such patients.

关键词： Dabigatran Brain injury Anticoagulation Dabigatran reversal

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Two-photon lithography for 3D magnetic nanostructure fabrication

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Nano Research 2018年第2期11卷 845-854页

作者： Gwilym Williams Matthew Hunt Benedikt Boehm Andrew May Michael Taverne Daniel Ho Sean Giblin Dan Read john Rarity Rolf Allenspach sam Ladak School of Physics and Astronomy Cardiff University Cardiff UK IBM Research - Zurich Rüschlikon Switzerland Department of electrical and electronic engineering University of Bristol Bristol UK

Ferromagnetic materials have been utilized as recording media in data storage devices for many decades. The confinement of a material to a two-dimensional plane is a significant bottleneck in achieving ultra-high recording densities, and this has led to the proposition of three-dimensional （3D） racetrack memories that utilize domain wall propagation along the nanowires. However, the fabrication of 3D magnetic nanostructures of complex geometries is highly challenging and is not easily achieved with standard lithography techniques. Here, we demonstrate a new approach to construct 3D magnetic nanostructures of complex geometries using a combination of two-photon lithography and electrochemical deposition. The magnetic properties are found to be intimately related to the 3D geometry of the structure, and magnetic imaging experiments provide evidence of domain wall pinning at the 3D nanostructured junction.

关键词： magnetism spintronics nanomagnefism three-dimensional (3D)lithography

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