Cross-wavelength invisibility integrated with various invisibility tactics

As a superior self-protection strategy, invisibility has been a topic of long-standing interest in both academia and industry, because of its potential for intriguing applications that have only appeared thus far in science fiction. However, due to the strong dispersion of passive materials, achieving cross-wavelength invisibility remains an open challenge. Inspired by the natural ecological relationship between transparent midwater oceanic animals and the cross-wavelength detection strategy of their predators, we propose a cross-wavelength invisibility concept that integrates various invisibility tactics, where a Boolean metamaterial design procedure is presented to balance divergent material requirements over cross-scale wavelengths. As proof of concept, we experimentally demonstrate longwave cloaking and shortwave transparency simultaneously through a nanoimprinting technique. Our work extends the concept of stealth techniques from individual invisibility tactics targeting a single-wavelength spectrum to an integrated invisibility tactic targeting a cross-wavelength applications and may pave the way for development of cross-wavelength integrated metadevices.

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IGCT Self-Protection Strategy for IGCT Converters

2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia) ◽

10.23919/icpe2019-ecceasia42246.2019.8797104 ◽

2019 ◽

Author(s):

Hong Zeng ◽

Xiulin Chen ◽

Yongmin Chen ◽

Xuejun Pan ◽

Shunbiao Zhang ◽

...

Keyword(s):

Protection Strategy ◽

Self Protection

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Discussion on Self-protection Strategy of Laboratory Staff in AIDS Testing

10.47939/mh.v2i9.157 ◽

2021 ◽

Keyword(s):

Laboratory Staff ◽

Protection Strategy ◽

Self Protection

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NMOSFET ESD self-protection strategy and underlying failure mechanism in advanced 0.13-μm CMOS technology

IEEE Transactions on Device and Materials Reliability ◽

10.1109/tdmr.2002.1014666 ◽

2002 ◽

Vol 2 (1) ◽

pp. 2-8 ◽

Cited By ~ 10

Author(s):

A. Salman ◽

R. Gauthier ◽

W. Stadler ◽

K. Esmark ◽

M. Muhammad ◽

...

Keyword(s):

Failure Mechanism ◽

Cmos Technology ◽

Protection Strategy ◽

Self Protection

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Wideband Rectangular Waveguide to Substrate Integrated Waveguide (SIW) E-Plane T-Junction

Electronics ◽

10.3390/electronics10030264 ◽

2021 ◽

Vol 10 (3) ◽

pp. 264

Author(s):

Roberto Vincenti Gatti ◽

Riccardo Rossi ◽

Marco Dionigi

Keyword(s):

Rectangular Waveguide ◽

Design Procedure ◽

Beam Forming ◽

Substrate Integrated Waveguide ◽

Proof Of Concept ◽

Hybrid Beam ◽

Full Wave ◽

Matching Networks ◽

Hybrid Circuit ◽

Good Agreement

A broadband rectangular waveguide to substrate integrated waveguide power divider for hybrid beam forming networks is presented. Rectangular waveguide symmetric E-plane irises are used to realize a multi-section matching network. A hybrid circuit and full-wave design procedure are described and adopted to synthesize three matching networks with one, two, and three irises, progressively increasing the bandwidth and exceeding the state of the art in the last two cases. Three proof-of-concept prototypes are manufactured and tested to validate the design procedure. Good agreement between simulated and measured performance confirms the validity of the proposed solution.

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Design and Fabrication of Hierarchical Multi-Stable Structures Through Multi-Material Additive Manufacturing

Volume 2A: 42nd Design Automation Conference ◽

10.1115/detc2016-59856 ◽

2016 ◽

Cited By ~ 1

Author(s):

Tian Chen ◽

Kristina Shea

Keyword(s):

Additive Manufacturing ◽

Design Procedure ◽

The Novel ◽

Proof Of Concept ◽

Form Finding ◽

Out Of Plane ◽

3D Printed ◽

Novel Structures ◽

Design For Am ◽

Stable Structures

The design and fabrication of hierarchical multi-stable structures using multi-material Additive Manufacturing (AM) is presented. First a reversible bistable unit actuator is designed to serve as the basis of the design hierarchy. With this unit actuator, the authors present monolithically printed proof-of-concept structures that can transform to multiple activated states, all of which are stable without the need for continuous energy input. The equilibrium positions of these hierarchical designs are found through iterative form finding when necessary. The novel structures illustrated in this paper are only made possible through design for AM that exploits the capabilities of a multi-material, inkjet 3D printer. The design procedure is illustrated through two concepts. The first consists of a series of tetrahedra fabricated as tiled deployable triangles with the out-of-plane members consisting of the actuators in the retracted configuration. The second concept consists of multiple shape changing square unit modules tiled in a grid to achieve complex 3D activated states including a hemisphere, a hyperbolic paraboloid, a star and a cube. Their design and prototyping form the foundation for new types of active and deployable 3D printed structures.

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Semi-synthesis and insecticidal activity of spinetoram J and its D-forosamine replacement analogues

Beilstein Journal of Organic Chemistry ◽

10.3762/bjoc.14.207 ◽

2018 ◽

Vol 14 ◽

pp. 2321-2330 ◽

Cited By ~ 4

Author(s):

Kai Zhang ◽

Jiarong Li ◽

Honglin Liu ◽

Haiyou Wang ◽

Lamusi A

Keyword(s):

Pest Control ◽

Insecticidal Activity ◽

Plutella Xylostella ◽

Insect Pests ◽

Cydia Pomonella ◽

Leaf Miner ◽

Human Beings ◽

Protecting Group ◽

Protection Strategy ◽

Self Protection

Spinetoram, a mixture of spinetoram J (XDE-175-J, major component) and spinetoram L (XDE-175-L), is a new kind of fermentation-derived insecticide with a broad range of action against many insect pests, especially Cydia pomonella, Leaf miner and Thrips. Similar to spinosad, spinetoram is friendly to the environment, and non-toxic to animals and human beings. Therefore, spinetoram has been widely applied in pest control and grain storage. In a previous study, we had reported a semi-synthesis of spinetoram J. However, in that synthesis, there were more experimental steps, and the operations were troublesome. So an improved synthesis based on a self-protection strategy was designed and discussed. In this work, 3-O-ethyl-2,4-di-O-methylrhamnose was used as both the reaction substrate of C9–OH and the protecting group of C17–OH. The number of synthetic steps and costs were significantly reduced. In addition, a variety of D-forosamine replacement analogues of spinetoram J were synthesized based on the improved semi-synthesis, and their insecticidal activities were evaluated against third-instar larvae of Plutella xylostella. Although none of the analogues were as potent as spinetoram, a few of the analogues have only a 20–40 times lower activity than spinetoram. In particular, one of these analogues was approximately as active as spinosad. This study highlights the possibility of developing new insecticidal chemistries by replacing sugars on natural products with other groups, and the improved semi-synthesis will be helpful for further researches on spinetoram.

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Direct measurement of electron-diffraction-pattern intensities using an energy loss spectrometer

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100155311 ◽

1989 ◽

Vol 47 ◽

pp. 668-669

Author(s):

A. G. Jackson ◽

M. Rowe

Keyword(s):

Thermal Effects ◽

Dynamic Range ◽

Scattering Amplitude ◽

Dynamical Theory ◽

Site Symmetry ◽

Proof Of Concept ◽

Parallel Acquisition ◽

Kinematic Approximation ◽

Speed Up ◽

Structure Calculations

Diffraction intensities from intermetallic compounds are, in the kinematic approximation, proportional to the scattering amplitude from the element doing the scattering. More detailed calculations have shown that site symmetry and occupation by various atom species also affects the intensity in a diffracted beam. [1] Hence, by measuring the intensities of beams, or their ratios, the occupancy can be estimated. Measurement of the intensity values also allows structure calculations to be made to determine the spatial distribution of the potentials doing the scattering. Thermal effects are also present as a background contribution. Inelastic effects such as loss or absorption/excitation complicate the intensity behavior, and dynamical theory is required to estimate the intensity value.The dynamic range of currents in diffracted beams can be 104or 105:1. Hence, detection of such information requires a means for collecting the intensity over a signal-to-noise range beyond that obtainable with a single film plate, which has a S/N of about 103:1. Although such a collection system is not available currently, a simple system consisting of instrumentation on an existing STEM can be used as a proof of concept which has a S/N of about 255:1, limited by the 8 bit pixel attributes used in the electronics. Use of 24 bit pixel attributes would easily allowthe desired noise range to be attained in the processing instrumentation. The S/N of the scintillator used by the photoelectron sensor is about 106 to 1, well beyond the S/N goal. The trade-off that must be made is the time for acquiring the signal, since the pattern can be obtained in seconds using film plates, compared to 10 to 20 minutes for a pattern to be acquired using the digital scan. Parallel acquisition would, of course, speed up this process immensely.

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Promoting Hearing Loss Prevention in Audiology Practice

Perspectives on Public Health Issues Related to Hearing and Balance ◽

10.1044/hcoa13.1.3 ◽

2012 ◽

Vol 13 (1) ◽

pp. 3-19 ◽

Cited By ~ 5

Author(s):

David C. Byrne ◽

Christa L. Themann ◽

Deanna K. Meinke ◽

Thais C. Morata ◽

Mark R. Stephenson

Keyword(s):

Hearing Loss ◽

Sound Level ◽

Health Campaigns ◽

Loss Prevention ◽

Hearing Conservation ◽

Prevention Services ◽

Occupational Programs ◽

Strategic Position ◽

Public Health Campaigns ◽

Self Protection

An audiologist should be the principal provider and advocate for all hearing loss prevention activities. Many audiologists equate hearing loss prevention with industrial audiology and occupational hearing conservation programs. However, an audiologist’s involvement in hearing loss prevention should not be confined to that one particular practice setting. In addition to supervising occupational programs, audiologists are uniquely qualified to raise awareness of hearing risks, organize public health campaigns, promote healthy hearing, implement intervention programs, and monitor outcomes. For example, clinical audiologists can show clients how to use inexpensive sound level meters, noise dosimeters, or phone apps to measure noise levels, and recommend appropriate hearing protection. Audiologists should identify community events that may involve hazardous exposures and propose strategies to minimize risks to hearing. Audiologists can help shape the knowledge, beliefs, motivations, attitudes, and behaviors of individuals toward self-protection. An audiologist has the education, tools, opportunity, and strategic position to facilitate or promote hearing loss surveillance and prevention services and activities. This article highlights real-world examples of the various roles and substantial contributions audiologists can make toward hearing loss prevention goals.

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