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Miniature,highly sensitive MOSCAP ring modulators in co-optimized electronic-photonic CMOS

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Photonics Research 2022年第1期10卷 I0001-I0007页

作者： HAYK GEVORGYAN ANATOL KHILO MARK T.WADE vladimir M.stojanovic MILOS A.POPOVIC Department of Electrical and Computer Engineering Boston UniversityBostonMassachusetts 02215USA Ayar Labs Inc. EmeryvilleCalifornia 94608USA Department of Electrical Engineering and Computer Sciences University of California BerkeleyBerkeleyCalifornia 94709USA

Convergence of high-performance silicon photonics and electronics,monolithically integrated in state-of-the-art CMOS platforms,is the holy grail for enabling the ultimate efficiencies,performance,and scaling of electronicphotonic *** requires the emergence of platforms that combine state-of-the-art RF transistors with optimized silicon photonics,and a generation of photonic device technology with ultralow energies,increased operating spectrum,and the elimination of power-hungry thermal *** this paper,in a co-optimized monolithic electronics-photonics platform(GlobalFoundries 45 CLO),we turn the metal-oxide-semiconductor(MOS) field-effect transistor’s basic structure into a novel,highly efficient MOS capacitor ring *** has the smallest ring cavity(1.5 μm radius),largest corresponding spur-free free spectral range(FSR=8.5 THz),and record 30 GHz/V shift efficiency in the O-band among silicon modulators demonstrated to *** 1 V_(pp) RF drive,we show an open optical eye while electro-optically tuning the modulator to track over 400 pm(69 GHz) change in the laser wavelength(using 2.5 V_(DC) range).A 90 GHz maximum electro-optic resonance shift is demonstrated with under 40 nW of power,providing a strong nonthermal tuning mechanism in a CMOS photonics *** modulator has a separately optimized body layer but shares the gate device layer and the gate oxide with 45 nm transistors,while meeting all CMOS manufacturability design *** type of convergent evolution of electronics and photonics may be the future of platforms for high-performance systemson-chip.

关键词： tuning modulator electronic

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A resilience-based approach in managing the closure and abandonment of large mine tailing ponds

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International Journal of Mining Science and Technology 2020年第5期30卷 737-746页

作者： Dragan Komljenovic Lazar stojanovic vladimir Malbasic Aleksandar Lukic Hydro-Québec Research Institute(IREQ) VarennesQC J3X 1S1Canada Faculty of Mining University of Banja Luka79101 PrijedorBosnia and Herzegovina ArcelorMittal Prijedor d.o.o.Prijedor 79101 PrijedorBosnia and Herzegovina

Mining tailing ponds are large infrastructure objects whose life cycle spans over several *** are indispensable for certain types of mines where technological process produces and rejects *** also have potential to generate risks for human life,property and *** that reason,it is essential to adequately manage them throughout all the stages of their life *** phase of their closure and abandonment is less studied and *** paper proposes a holistic resilience-based approach for analyzing this phase of their life *** proposed methodology is validated through a case study at an actual surface iron ore mine in Bosnia and Herzegovina.

关键词： Mine tailing ponds Closure Abandonment Resilience Risks Uncertainties Complexity

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Target acquisition performance in the presence of JPEG image compression

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Defence Technology（防务技术） 2024年第3期33卷 30-41页

作者： Boban Bondzulic Nenad stojanovic vladimir Lukin Sergey A.Stankevich Dimitrije Bujakovic Sergii Kryvenko University of Defence in Belgrade Military AcademyVeljka Lukica Kurjaka 3311000 BelgradeSerbia National Aerospace University Department of Information-Communication TechnologiesChkalova 1761070 KharkivUkraine National Academy of Sciences of Ukraine Scientific Centre for Aerospace Research of the EarthOles Honchar 55-b01054 KyivUkraine

This paper presents an investigation on the effect of JPEG compression on the similarity between the target image and the background,where the similarity is further used to determine the degree of clutter in the *** new clutter metrics based on image quality assessment are introduced,among which the Haar wavelet-based perceptual similarity index,known as HaarPSI,provides the best target acquisition prediction *** is shown that the similarity between the target and the background at the boundary between visually lossless and visually lossy compression does not change significantly compared to the case when an uncompressed image is *** future work,through subjective tests,it is necessary to check whether this presence of compression at the threshold of just noticeable differences will affect the human target acquisition *** values are compared with the results of subjective tests of the well-known target Search_2 database,where the degree of agreement between objective and subjective scores,measured through linear correlation,reached a value of 90%.

关键词： JPEG compression Target acquisition performance Image quality assessment Just noticeable difference Probability of target detection Target mean searching time

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Repeated penile girth enhancement with biodegradable scaffolds： microscopic ultrastructural analysis and surgical benefits

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Asian Journal of Andrology 2018年第5期20卷 488-492页

作者： Miroslav L Djordjevic Uros Bumbasirevic Borko stojanovic Tamara Kravic Stevovic Tamara Martinovic Marta Bizic vladimir Kojovic School of Medicine University of Belgrade Belgrade 11000 Serbia University Children's Hospital Belgrade 11000 Serbia Institute for Urology Clinical Center ofSerbia Belgrade 11000 Serbia

Autologous tissue engineering using biodegradable scaffolds as a carrier is a well-known procedure for penile girth enhancement. We evaluated a group of previously treated patients with the aim to analyze histomorphometric changes after tissue remodeling and to estimate the benefits of repeated procedure. Between February 2012 and December 2016, a group of 21 patients, aged 22-37 （mean 28.0） years, underwent a repeated penile girth enhancement procedure with biodegradable scaffolds. Procedure included insertion of two poly-lactic-co-glycolic acid scaffolds seeded with laboratory-prepared fibroblasts from scrotal tissue specimens. During this procedure, biopsy specimens of tissue formed after the first surgery were taken for microscopic analysis. The mean follow-up was 38 months. Connective tissue with an abundance of connective tissue fibers, small blood vessels, and inflammatory cells were observed in all analyzed surgically removed tissue. Ultrastructural analysis of these tissue samples discovered the presence of large quantities of collagen fibrils running parallel to each other, forming bundles, with a few widely spread fibroblasts. In total, the mean values of flaccid and erect gain in girth after the second surgery were 1.1 ± 0.4 （range： 0.6- 1.7） cm and 1.0±0.3 （range： 0.6-1.5） cm, respectively. Microscopic evaluation of newly formed tissue, induced by autologous tissue engineering using biodegradable scaffolds, showed the presence of vascularized loose connective tissue with an abundance of collagen fibers, fibroblasts, and inflammatory cells, indicating active neovascularization and fibrinogenesis. The benefit of the repeated enhancement procedure was statistically significant.

关键词： biodegradable scaffolds microscopy penile enhancement tissue engineering