High Quality OFDM Communication System Based on Carrier Interferometry and Digital Linearization of HPA

Abstract The success of social insects is largely intertwined with their highly advanced chemical communication system that facilitates recognition and discrimination of species and nest-mates, recruitment, and division of labor. Hydrocarbons, which cover the cuticle of insects, not only serve as waterproofing agents but also constitute a major component of this communication system. Two cryptic Crematogaster species, which share their nest with Camponotus ants, show striking diversity in their cuticular hydrocarbon (CHC) profile. This mutualistic system therefore offers a great opportunity to study the genetic basis of CHC divergence between sister species. As a basis for further genome-wide studies high-quality genomes are needed. Here, we present the annotated draft genome for Crematogaster levior A. By combining the three most commonly used sequencing techniques—Illumina, PacBio, and Oxford Nanopore—we constructed a high-quality de novo ant genome. We show that even low coverage of long reads can add significantly to overall genome contiguity. Annotation of desaturase and elongase genes, which play a role in CHC biosynthesis revealed one of the largest repertoires in ants and a higher number of desaturases in general than in other Hymenoptera. This may provide a mechanistic explanation for the high diversity observed in C. levior CHC profiles.

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High-quality frequency-locked multi-carrier source for a terabit optical communication system

2013 6th IEEE/International Conference on Advanced Infocomm Technology (ICAIT) ◽

10.1109/icait.2013.6621530 ◽

2013 ◽

Author(s):

Xiaoguang Zhang

Keyword(s):

Optical Communication ◽

Communication System ◽

Optical Communication System ◽

High Quality

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An All-Organic Flexible Visible Light Communication System

Sensors ◽

10.3390/s18093045 ◽

2018 ◽

Vol 18 (9) ◽

pp. 3045 ◽

Cited By ~ 15

Author(s):

César Vega-Colado ◽

Belén Arredondo ◽

Juan Torres ◽

Eduardo López-Fraguas ◽

Ricardo Vergaz ◽

...

Keyword(s):

Visible Light ◽

Communication System ◽

Communication Systems ◽

Visible Light Communication ◽

Home Automation ◽

Proof Of Concept ◽

High Quality ◽

Modulation Response ◽

Frequency Responses ◽

Potential Applications

Visible light communication systems can be used in a wide variety of applications, from driving to home automation. The use of wearables can increase the potential applications in indoor systems to send and receive specific and customized information. We have designed and developed a fully organic and flexible Visible Light Communication system using a flexible OLED, a flexible P3HT:PCBM-based organic photodiode (OPD) and flexible PCBs for the emitter and receiver conditioning circuits. We have fabricated and characterized the I-V curve, modulation response and impedance of the flexible OPD. As emitter we have used a commercial flexible organic luminaire with dimensions 99 × 99 × 0.88 mm, and we have characterized its modulation response. All the devices show frequency responses that allow operation over 40 kHz, thus enabling the transmission of high quality audio. Finally, we integrated the emitter and receiver components and its electronic drivers, to build an all-organic flexible VLC system capable of transmitting an audio file in real-time, as a proof of concept of the indoor capabilities of such a system.

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SCIENTIFIC JOURNAL AS THE BASIS OF PROFESSIONAL COMMUNICATION: PROBLEMS OF MODERN DEVELOPMENT

Scholarly Research and Information ◽

10.24108/2658-3143-2020-3-1-85-96 ◽

2020 ◽

Vol 3 (1) ◽

pp. 85-96

Author(s):

E. V. Ivanitskaya

Keyword(s):

Communication System ◽

Evaluation System ◽

Scientific Journal ◽

Scholarly Communication ◽

Scientific Journals ◽

High Quality ◽

Russian Scientific ◽

Independent Expert ◽

Scholarly Communication System

An article in a scientific journal is the key element of modern scholarly communication system, in which scientific journals act as conductors of national science and researchers to the international level. Integration of Russian scientific journals into the global knowledge system and improving their competitiveness are necessary conditions for improving the competitiveness of Russian science itself.Today, we see a low quality of Russian scientific periodicals with an excessive number of journals. The highly competitive environment and the total use of bibliometric approaches in the research and assessment of science born unfair race for indicators, developing imitation science.The study aims to analyze, determine and propose solutions of topical issues of Russian scientific journals. The article is a case study of the oldest monthly scientific and production journal “Occupational Safety in Industry”. The transformation of the work of the editorial board is considered within the 2016–2019 period. We analyze the history of formation, development and the common problems of restructuring the activities of the editorial boards that have occurred in recent years.It is shown that the formalization of scientometric indicators and their impact on funding cause a sharp increase in the number of authors with multiple affiliations. In general, the use of bibliometrics in Russia has generated a number of systemic risks that threaten the development of national science.The study formulates the tasks and nearest prospects for the development of scientific journals as the basis for a changing scholarly communication system. It is necessary to develop the qualitative scientometrics with new scientometric indices and qualitative author-evaluating indicators (with more precise scientometrics, new tools will appear, including those for identifying dishonest scientists).To improve the evaluation system of Russian scientific journals, we propose: improving the generally accepted scientometric methods taking into account Russian specifics and introducing a system for assessing and monitoring the quality of Russian scientific journals, combining the use of bibliometric information and independent expert evaluation. The creation of high-quality scientometrics is possible with the use of artificial intelligence systems.The proposed steps will build a self-regulatory ecosystem on the Russian space of scholarly communication with well-functioning high-quality expertise, which will determine the future of scientific journals.

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Some problems of objective-prism spectra classification

Symposium - International Astronomical Union ◽

10.1017/s0074180900053183 ◽

1966 ◽

Vol 24 ◽

pp. 51-52

Author(s):

E. K. Kharadze ◽

R. A. Bartaya

Keyword(s):

Short Wave ◽

High Quality ◽

Stellar Spectra ◽

Objective Prism

The unique 70-cm meniscus-type telescope of the Abastumani Astrophysical Observatory supplied with two objective prisms and the seeing conditions characteristic at Mount Kanobili (Abastumani) permit us to obtain stellar spectra of a high quality. No additional design to improve the “climate” immediately around the telescope itself is being applied. The dispersions and photographic magnitude limits are 160 and 660Å/mm, and 12–13, respectively. The short-wave end of spectra reaches 3500–3400Å.

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A non-cyanide method of electropolishing silver

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107873 ◽

1978 ◽

Vol 36 (1) ◽

pp. 146-147

Author(s):

R. L. Lyles ◽

S. J. Rothman ◽

W. Jäger

Keyword(s):

Electron Microscopy ◽

Sulphuric Acid ◽

Methyl Alcohol ◽

Health Hazards ◽

Silver Alloy ◽

High Quality ◽

Silver Alloys ◽

Free Sample ◽

Specimen Quality ◽

Standard Techniques

Standard techniques of electropolishing silver and silver alloys for electron microscopy in most instances have relied on various CN recipes. These methods have been characteristically unsatisfactory due to difficulties in obtaining large electron transparent areas, reproducible results, adequate solution lifetimes, and contamination free sample surfaces. In addition, there are the inherent health hazards associated with the use of CN solutions. Various attempts to develop noncyanic methods of electropolishing specimens for electron microscopy have not been successful in that the specimen quality problems encountered with the CN solutions have also existed in the previously proposed non-cyanic methods.The technique we describe allows us to jet polish high quality silver and silver alloy microscope specimens with consistant reproducibility and without the use of CN salts.The solution is similar to that suggested by Myschoyaev et al. It consists, in order of mixing, 115ml glacial actic acid (CH3CO2H, specific wt 1.04 g/ml), 43ml sulphuric acid (H2SO4, specific wt. g/ml), 350 ml anhydrous methyl alcohol, and 77 g thiourea (NH2CSNH2).

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A High Resolution Scanning Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100101529 ◽

1968 ◽

Vol 26 ◽

pp. 356-357

Author(s):

A. V. Crewe ◽

J. Wall ◽

L. M. Welter

Keyword(s):

High Resolution ◽

Field Emission ◽

Spherical Aberration ◽

Focal Length ◽

Spot Size ◽

Emission Source ◽

Field Of View ◽

Scanning Microscope ◽

Magnetic Lens ◽

High Quality

A scanning microscope using a field emission source has been described elsewhere. This microscope has now been improved by replacing the single magnetic lens with a high quality lens of the type described by Ruska. This lens has a focal length of 1 mm and a spherical aberration coefficient of 0.5 mm. The final spot size, and therefore the microscope resolution, is limited by the aberration of this lens to about 6 Å.The lens has been constructed very carefully, maintaining a tolerance of + 1 μ on all critical surfaces. The gun is prealigned on the lens to form a compact unit. The only mechanical adjustments are those which control the specimen and the tip positions. The microscope can be used in two modes. With the lens off and the gun focused on the specimen, the resolution is 250 Å over an undistorted field of view of 2 mm. With the lens on,the resolution is 20 Å or better over a field of view of 40 microns. The magnification can be accurately varied by attenuating the raster current.

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