Fabrication - Science topic

Several Tm:YAG/Ho:YAG co-derived silica fibers (THCDSFs) were fabricated using the molten core (MC) method. A maximum gain coefficient of 5.16 dB/cm at 2040 nm was obtained for the THCDSF prepared through the utilization of a spliced piece of semi-cylindrical 15.0 at% Tm:YAG and 2.5 at% Ho:YAG crystals as the core precursor material. Employing a 2....

Hyperledger Fabric (HLF) is an open-source distributed ledger for businesses to establish private blockchains with granular control over data access and privacy. It typically has multiple endorsing, committing, and ordering peers that collectively contribute to the network's functionality and security. For optimal performance, balancing the endorse...

We design and fabricate an eight-channel thin-film lithium niobate (TFLN) arrayed-waveguide grating (AWG) and demonstrate the electro-optical tunability of the device. The monolithically integrated microelectrodes are designed for waveguide phase modulation and wavelength tuning. Experiments show that the fabricated electro-optically controlled TFL...

To realize the wideband and efficient operation of Doherty power amplifier (DPA) in multi‐band mode, this paper proposes a tri‐band DPA design method based on phase and impedance‐constrained optimization. First, the phases required for impedance transformation networks across multi‐band are determined based on the impedance required when the DPA op...

A broadband ±45° dual-polarized base-station antenna based on crossed-dipoles with parasitic elements has been presented in this study. This antenna consists of printed dipoles fed by integrated baluns, parasitic elements, and a ground plane below them. As a result of using parasitic elements on the dipoles and creating a suitable coupling between...

This study investigates the role of pitch size in achieving high numerical aperture (NA) and focusing efficiency in metalens design, while demonstrating how high refractive index materials contribute to performance enhancement by enabling smaller pitch sizes through reduced filling ratios. Silicon-rich nitride (SRN) was chosen as the material platf...

Аннотация: В статье рассматривается традиционная и современная национальная женская одежда узбекского народа. Отражается использование исторических тенденций в дизайне современного костюма. Описывается изменения в современной моде национальной одежды. Abstract: The article examines the traditional and modern national women's clothing of the Uzbek...

Cours sur les technosols : définition, réglementation, étude bibliographique et chantiers de référence, retour d'expérience sur des technosols hors sol ou en pleine terre.

In this article, I explore whether domesticated animals (DAs) of different speciesbelonging to the same community participate in authoring and sustaining, what I call, thefabric of zoodemocracy. The fabric refers to a set of activities, social norms, and valuesthat together sustain our democracies (e.g., cooperation, protest, and helping one’sneigh...

Microelectromechanical systems (MEMS) refer to miniaturized mechanical and electro-mechanical elements that are fabricated through microelectronic processes [...]

Аннотация: В статье изложена специфика образования и развития Узбекского национального костюма, развития детского национального костюма, отличительные особенности. Дан анализ исторического и современного облика детского национального костюма. Abstract: The article describes the specifics of the formation and development of theUzbek national costum...

Fabry–Perot (FP) lasers with a cavity length shorten down to 50 µm were investigated. One or two laser mirrors were formed by focused ion beam etching. InGaAs quantum dots of high density were used as the laser active region. The lasers operate in a pulsed regime up to at least 105°С. A comparison with lasers formed by the facet cleaving method (mi...

A rendering technique is proposed for creating full-parallax, large-scale computer-generated holograms (CGHs) that can reconstruct a three-dimensional (3D) scene, including transparent objects. The proposed method enables us to simulate optical refraction based on wave optics without relying on Snell’s law. Several techniques are also presented to...

Due to the limitation of manufacturing techniques, voids, low density areas and wrinkle defects inevitably occur during the fabricating process of ceramic matrix composites (CMCs). This study aims to reveal the effect of various defects (voids, low density areas and wrinkle defects) on the tensile strength of plain weave C/SiC composites. The micro...

Polarization devices play a key role in many optical technologies and applications. However, traditional polarization devices are often large and lack integration, and achieving polarization conversion typically requires combining multiple devices, which makes it challenging to realize integrated optical systems. Following the current trend of opti...

In low intermediate frequency (low-IF) receivers, image interference rejection is one of the core tasks to be accomplished. Conventional active polyphase filters (APPFs) are unable to have a sufficient image rejection ratio (IRR) at high operating frequencies due to the degradation of the IRR by the amplitude and phase imbalances produced by the se...

We have demonstrated reconfigurable light states in an optical lattice utilizing the electro-optic Pockels effect in a LiNbO 3 slab through altering the transverse refractive index profile of the lattice by pseudo-random bit sequence ( P R B S). By modifying the P R B S equivalent voltage range, different light states (ballistic, superdiffusive, di...

In this work, the first fabrication and investigation of normally-off single crystal hydrogen-sterminated diamond MOSFETs with Ga2O3 dielectric has been successfully carried out. 50-nm-thick Ga2O3 was deposited by electron-beam evaporation technique at room temperature. The maximum drain current was −36 mA/mm, which was 164 times larger than previo...

This paper presents an overview of the production of functionally graded materials (FGMs) using directed energy deposition (DED) where the advancements, challenges, and future directions in this field are explored. Functionally graded materials entail the joining of two or more different materials to produce a part of which the chemical and thus me...

A wideband spatiotemporally modulated nonmagnetic circulator composed of three time‐varying resonators in Y‐topology is presented in this paper. The triple resonators are designed with coupled microstrip lines and connected to a central node. By applying a time‐modulated signal with a 120° progressive phase shift to the resonators, the angular mome...

Semiconductor spin qubits have emerged as a promising platform for quantum computing, following a significant improvement in their control fidelities over recent years. Increasing the qubit count remains challenging, beginning with the fabrication of small features and complex fanouts. A particular challenge has been formed by the need for individu...

In this paper, a new coating structure is proposed for broadband radar cross section (RCS) reduction using 1-bit metasurfaces. The designed structure consists of two types of unit cell, arranged in concentric square rings. The substrate of unit cells is different, FR4 and Ultralum-2000 with thicknesses of 2.4 and 0.762 mm, respectively. The propose...

Reflectionless bandpass filters (BPF) have been realized in the waveguide and planar circuits; however, the literature does not report reflectionless air‐filled coaxial BPF. In this article, an X‐band input‐reflectionless air‐filled coaxial BPF is presented. The proposed filter has two transmission zeros (TZs) at the lower and upper stopband, respe...

In this paper, we propose and demonstrate an integrated polarization-insensitive single-mode filter (SMF) on a 340 nm silicon-on-insulator (SOI) platform, by introducing two lateral coupling waveguides to couple high-order modes from central single-mode waveguide to lateral waveguides. The experimental results show that the excess loss is <0.29 dB...

Drastic enhancements of both direct and indirect light emissions are demonstrated from Ge microbridge web-structures fabricated based on the strained Ge-on-Si (110) substrate. This enhancement is concluded to be caused more predominantly by the light confinement effect in several-μm-scale microbridges than the induced strain. It is also remarkable...

This letter presents the design and implementation of a novel analog phase shifter architecture based on generating and synthesizing non‐quadrature vector signals. The phase shift is achieved through coarse and fine‐tuning. The coarse tuning is executed by the path selectors of the generated phase vectors, whereas tunable passive attenuators do the...

As we navigate the complexities of modern economics, a profound question emerges: can artificial intelligence be the catalyst for unprecedented prosperity? The symbiosis of human ingenuity and AI's computational prowess may hold the answer. By harnessing AI's potential, we may unlock novel solutions to longstanding economic challenges, fostering g...

Design and fabrication of a waste lubricant recycling machine

Herein we have synthesized 9-aryl-1,8-dioxo-octahydroxanthenes using a newly developed graphene composite through heterocyclization. Notably, derivatives with –Cl and –NO 2 substitutions demonstrated significant inhibition of protein denaturation, suggesting strong anti-inflammatory activity. Furthermore, compounds with –H, –Cl, and –NO 2 exhibited...

Textile industry is a significant source of revenue in Bangladesh. More effort is being put into producing high-quality woven fabrics. The generation of fiber balls is a significant challenge in the fabrication of woven fabrics. It causes coloring issues in woven fabrics as well as fabric rejection. The method of fiber ball generation during weavin...

Аннотация: В статье отражается инновационные мировые достижения узбекской ткани атлас и адрас. Abstract: The article reflects the innovative world achievements of the Uzbek fabrics atlas and adras. Ключевые слова: инновации, адрас, атлас, ткань, художник, рисунок. Keywords: innovation, adras, atlas, fabric, artist, drawing.

As we initiate on an era of unprecedented technological advancement, the emergence of artificial intelligence beckons a profound shift in the global economic landscape. The symbiotic relationship between human innovation and machine learning will undoubtedly reshape the fabric of our economic systems, precipitating far-reaching consequences that wi...

The burgeoning presence of artificial intelligence in our lives precipitates a fundamental inquiry: will its ascendancy catalyze unprecedented prosperity or exacerbate existing economic disparities? As we stand at the cusp of this technological revolution, it is imperative to scrutinize the potential consequences of AI's pervasive integration into...

Abstract: В статье отражаются инновационные мировые достижения узбекской ткани атлас и адрас. Keywords: innovation, adras, atlas, color, fabric, artist, drawing.

Transistor technology plays a crucial role in human life. The aim is to increase the number of applications and enhance speed in a single integrated circuit (IC). Here, we review the nanosheet field-effect transistor and its various effects, including the impact of device dimensions and temperature, the effect of surface orientation, and reliabilit...

In this study, we demonstrated an inspection system utilizing reflection phase microscopy to enhance both depth range and field of view (FOV). By implementing a dual-wavelength method, we achieved a maximum expected depth range of 7.7 µm. The amplified phase due to the dual-wavelength approach was effectively mitigated by utilizing the configuratio...

Polarization reconfigurable antenna using parasitic elements are designed for sub-6 GHz applications. A circular patch antenna is designed along with two semicircular arc - elements attached to the radiator with four diodes. By controlling the ON and OFF states of the diodes, the polarization of the antenna can be switched between LHCP and RHCP. Pa...

Fabrication of porous microcapsules from PDMS:TMPTMA double emulsion drops.

Reproducible large-area fabrication is one of the remaining challenges for the commercialization of perovskite photovoltaics. Imaging methods augmented with deep learning (DL) enable in-line detection of spatial or temporal inconsistencies...

Nowadays, the demand for high precision surface on the workpiece is increasing along with the manufacturing process. Presently various types of abrasives are used for good surface finish on the workpiece. Most companies are now using silicon carbide or aluminium oxide abrasive for precision work. Where aluminium oxide is used for removing metal bur...

We developed a facile one-pot method for fabricating physical gels consisting of ultrahigh molecular weight (UHMW) polymers and highly concentrated lithium salt electrolytes. We previously reported physical gels formed from...

The egg-shell-type γ-Al2O3 catalyst having a Cu shell was developed using the simple quick dry (QD) technique. The fabricated catalyst is developed for use in a direct N2O decomposition (deN2O)...

The waste organic solvents, the discharge of all kinds of oil-water mixture and the frequent infiltration of oil pollution into the water have brought unbearable threats to the ecological environment....

A polymer-assisted method was developed to fabricate metal-free N-doped porous carbon nanoflower as an excellent oxygen reduction electrocatalyst.

This paper proposed a low-profile dual-polarization wideband inverted-F fed stacked-patch semi-flexible antenna. The proposed antenna features a stacked-patch on the top PCB layer and two orthogonal inverted-F feed structures on the bottom PCB layer. Flexibility is achieved through the thin, flexible bottom PCB layer, while the rigid top PCB layer...

The accelerating expansion of the Universe, driven by dark energy, has profound implications for the stability of space-time. This paper explores the effects of cosmic acceleration on the fabric of space-time, particularly how it influences the stability of cosmological structures, including the cosmological horizon, singularities, and the evolutio...

Aqueous Fe-ion batteries are largely unexplored due to their short cycle life despite the extremely low material cost. The working mechanisms are mostly undisclosed with only a few experimental studies....

Bustier is underwear that has a function, namely shaping the body to be more proportional. The manufacture of this bustier uses satin patchwork as the main ingredient in its manufacture. Satin fabric is a type of fabric material that is made through a weaving process using the weave technique or filament fiber technique. Patchwork is a craft that c...

The study explored the additive manufacturing method based on the Liquid Deposition Method (LDM)-clay 3d printing to fabricate tessellated geometry bound in a basic shape like square, triangle, hexagon etc. Clay 3d printing explores a new way of fabrication that incorporates computational methods of generating toolpaths for nozzle movement and mate...

Bu çalışma, Safranbolu ilçesindeki tarihi yapıların kitabelerindeki Ebced kullanımını tespit ve analiz etmek amacıyla yapılmıştır. Türk-İslam sanatındaki kitabeler, zaman içinde diğer sanat türleriyle birlikte gelişerek mimari eserler üzerinde işlev üstlenmişlerdir. Başlangıçta daha basit ifadelerle ortaya çıkan kitabeler, zaman içinde-özellikle Os...

This study introduces the results of an optimization study on sol–gel application conditions applied to obtain multifunctional (water repellent/flame retardant) denim fabrics using the Design Expert software and a step-by-step approach. The study started by obtaining the proper drying/condensation parameters and water-repellent additive amount, fol...

In this paper, a method for the design of tunable multifunctional attenuators is proposed by analyzing the characterization of dual-mode microstrip resonators loaded by a graphene-sandwiched structure (GSS). Firstly, the odd–even mode method is applied to analyze the resonance characteristics of two common GSS-loaded dual-mode resonators, which cle...

This study investigated the auxetic performances of single and double layer fabrics woven by using braid weft yarns with different structural parameters. Non-elastane braid weft yarns containing of yarn components with different filament numbers and braid weft yarns containing elastane and conventional warp yarns were used in fabrics. To investigat...

The authors wish to make a change to the published paper [...]

This article tries to answer the question: what happens when the fabric of literary allusions, adopted or translated elements, intertexts that occur in the original literary texts are transferred into another language? How do literary translators deal with this phenomenon, what strategies do they use to transpose the intertextuality they have ident...

I entertain here the possibility of a scientific argument and novel theory, that what we call as "free space" or vacuum space or fabric of spacetime is actually an exotic type of gravitons condensate. In other words, space is made up and quantized by gravitons.

In this paper, the author reviewed the development of the natural fabrics, expounding the actuality of the exploitation on new type environmental natural fabrics, analyzing the production and the traits of the natural fabrics and the chemical fiber, and pointed out the significance of empoldering new environmental foliage fibers to meet the demand...