Science topics: Chips
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Article
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Coolant is a substance that applied in a machining process for the efficient machining of materials. The application of coolants is based on the several factors including the types of machining process, workpiece material, cutting tool and cost. Coolant helps to dissipate the heat that can be generated during the machining operation, induce lubrica...
Article
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Micro-milling is an inevitable machining process for the fabrication of products with complex shapes and high dimensional accuracy. However, this process usually needs post-processing operations to remove the burrs formed from the ductile materials. This research work focuses on the development of a micro-milling strategy to suppress the formation...
Article
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Increasing complexity of electronic devices and chips places increasingly stringent requirements on heat sinks. A novel manifold microchannel heat sink with diverging/converging channels is proposed to improve heat transfer performance. The flow and heat transfer characteristics under single-phase are investigated numerically. The effects of two ke...
Chapter
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The robotics industry is rapidly evolving driven by better and cheaper computer chips and affordable 3D printing technologies. All these aspects are a catalyst that helps in building new concepts and prototypes at a lower cost, and easier and faster than ever before. This paper presents the entire process of building an articulated robotic arm with...
Article
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Objective The 3.7 kb deletion (-α3.7) in the α-globin cluster, which characterizes α⁺-thalassemia, has been reported to have a carrier rate of 4.78% in southern China. Three -α3.7 subtypes have been identified worldwide. However, the -α3.7 III subtype has not previously been identified in China. Herein, we reported identification of the -α3.7 III s...
Article
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Climate change in Maine is characterized by increasing rates of warming temperatures and more intense rain events, which lead to altered growing seasons, earlier emergence of pests, increased seasonal drought and large crop losses. These changes have significant impacts on wild blueberry systems and make it more difficult for growers to manage this...
Article
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Objectives BCR-ABL1 and JAK2 V617F coexistence in myeloproliferative neoplasms has been described as concomitant or sequential events. Despite this, we present a unique case of chronic myeloid leukemia (CML) not referable to either of the known scenarios. Methods BCR-ABL1 molecular monitoring was performed by real-time quantitative PCR (RQ-PCR). A...
Book
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Written by an expert team and praised for its refreshing approach, this essential text offers a critical, holistic understanding of strategy theory and practice. The fourth edition has been fully updated to include: • Coverage of contemporary issues including the Covid-19 pandemic, climate change and digitalization • Topical and engaging case studi...
Article
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A 16-channel photodetector array receiving module with good performance as low loss, fine tuning and high reliability is manufactured in our laboratory. The whole module was consisted with a silica arrayed waveguide grating chip (AWG), a thermo-optical type variable optical attenuator (VOA), a photodetectors (PDs) array with direct-current (DC) bia...
Article
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Background Integrin alpha 2 (ITGA2) has been recently reported to be an oncogene and to play crucial roles in tumor cell proliferation, invasion, metastasis, and angiogenesis. Our previous study showed that ITGA2 was overexpressed in pancreatic cancer and promoted its progression. However, the mechanism of ITGA2 overexpression and other mechanisms...
Article
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Next-generation sequencing is a promising approach for the detection of causal variants within previously identified quantitative trait loci. Because of the costs of re-sequencing experiments, this application is currently mainly restricted to subsets of animals from already genotyped populations. Imputation from a lower to a higher marker density...
Article
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The paper presents research focused on behaviour of cement-bonded particleboards with modified composition during sudden changes of temperature and humidity. Four types of boards were made—one control and three modified ones. Finely ground limestone was used as a modifying component in binder. Secondary wood particles made from crushing cuttings of...
Article
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A novel multi-cross-ribbed-fin layout was proposed to supersede the original smooth fin to fulfill the lightweight requirement of the air-cooled heat sink for the electrical vehicle motor controller. The thermal design with multi-cross-ribbed-fins was optimized using the multi-objective optimization method to minimize the chip’s temperature rise an...
Article
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As an important computing operation, photonic matrix–vector multiplication is widely used in photonic neutral networks and signal processing. However, conventional incoherent matrix–vector multiplication focuses on real-valued operations, which cannot work well in complex-valued neural networks and discrete Fourier transform. In this paper, we prop...
Article
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A network of microchannels is formed at the interface between the cutting tool and the workpiece during machining due to their rough surface structures. The penetration of coolant into these microchannels has a great effect on the machined surface quality by changing the frictional behaviour and heat transfer characteristics of the interfaces. Most...
Article
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The insertion torque of a dental implant is an important indicator for the primary stability of dental implants. Thus, the preoperative prediction for the insertion torque is crucial to improve the success rate of implantation surgery. In this present research, an alternative method for prediction of implant torque was proposed. First, the mechanic...
Article
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Electromagnetic filtering is essential for the coherent control, operation and readout of superconducting quantum circuits at milliKelvin temperatures. The suppression of spurious modes around transition frequencies of a few GHz is well understood and mainly achieved by on-chip and package considerations. Noise photons of higher frequencies – beyon...
Article
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Background Metabolic syndrome (MetS) is characterized by the coexistence of disorders such as diabetes, hypertension, hyperlipidemia, and obesity and is affected by genetic factors. Previous genome-wide association studies (GWAS) suggested that APOA5 gene variants were significantly associated with MetS and its components. Dietary factors such as r...
Article
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The complex microwave permittivity—including anisotropy- of wood chips of softwood has been measured for different moisture contents in the band 0.75 to 2.5 GHz using an ultra-wide band radio transmission technique. The real and imaginary parts increase monotonically with moisture content. The wood chips are oriented by gravity, which gives anisotr...
Article
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Background TGF-β1 promotes keratinocyte migration and re-epithelialization of cutaneous wounds during the wound healing process. Decreased SOCS7 expression has been associated with increased healing potential. However, the relationship between TGF-β1 and SOCS7 in wound re-epithelialization remains unclear. Objectives To investigate the relationshi...
Article
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The Precise Point Positioning (PPP) service of BeiDou-3 Navigation Satellite System (BDS-3) is implemented on its Geostationary Earth Orbit (GEO) satellites. However, its signal design is limited by the actual power of satellite and other conditions. Furthermore, the design needs to fully consider the compatibility of different service phases. Star...
Article
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We theoretically and experimentally present a novel method to accurately extract coupling coefficients of directional couplers using a single circuit. It utilizes the phenomenon of resonance splitting induced by mode coupling in a ring resonator, where the splitting distance is directly proportional to the coupling coefficient of the coupler that c...
Article
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Nanoparticles play irreplaceable roles in optoelectronic sensing, medical therapy, material science, and chemistry due to their unique properties. There are many synthetic pathways used for the preparation of nanoparticles, and different synthetic pathways can produce nanoparticles with different properties. Therefore, it is crucial to control the...
Article
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Multipath interference seriously degrades the performance of Global Navigation Satellite System (GNSS) positioning in an urban canyon. Most current multipath mitigation algorithms suffer from heavy computational load or need external assistance. We propose a multipath mitigation algorithm based on the steepest descent approach, which has the merits...
Article
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Autoimmunity has emerged as a characteristic of the post-COVID syndrome (PCS), which may be related to sex. In order to further investigate the relationship between SARS-CoV-2 and autoimmunity in PCS, a clinical and serological assessment on 100 patients was done. Serum antibody profiles against self-antigens and infectious agents were evaluated by...
Article
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Wood dust produced in medium-density fiberboard (MDF) processing is a major occupational hazard in wood industry and may damage processing equipment. In many wood processing factories, dust collecting systems need to be optimized for the distributional and morphological characteristics of dust in the workshop so that economical and efficient dust c...
Article
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A common full-color method involves combining micro-light-emitting diodes (LEDs) chips with color conversion materials such as quantum dots (QDs) to achieve full color. However, during color conversion between micro-LEDs and QDs, QDs cannot completely absorb incident wavelengths cause the emission wavelengths that including incident wavelengths and...
Article
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This paper presents a miniaturized equipment used in tracking and pointing, and provides a method for free space optical communication among small platform. This scheme uses simple scan mirror and receiver with single photo detector to achieve tracking function. Signal beacon is controlled to rotate around target receiver. Transmitter constantly ad...
Article
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Board level vibration testing is intended to assess prediction of the reliability of solder joint interconnects that are formed between electronic components and printed circuit boards (PCB). Frailties in the stress test experiment might lead to false board level reliability (BLR) evaluations. Therefore, it is essential to have a well-characterized...
Article
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Cortical bone is semi-brittle and anisotropic, that brings a challenge to suppress vibration and avoid undesired fracture in precise cutting process in surgeries. In this paper, a novel analytical model is proposed to represent cortical bone cutting processes. The model is utilized to predict the chip formations, material removal behavior and crack...
Article
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Airflow sensors are an essential component in a wide range of industrial, biomedical, and environmental applications. The development of compact devices with a fast response and wide measurement range capable of in situ airflow monitoring is highly desirable. Herein, we report a miniaturized optical airflow sensor based on a GaN chip with a flexibl...
Article
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Compact terahertz (THz) functional devices are greatly sought after for high-speed wireless communication, biochemical sensing, and non-destructive inspection. However, controlled THz generation, along with transport and detection, has remained a challenge especially for chip-scale devices due to low-coupling efficiency and unavoidable absorption l...
Article
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Large-scale, high-throughput specificity assays to characterize binding properties within a competitive and complex environment of potential binder-target pairs remain challenging and cost prohibitive. Barcode cycle sequencing (BCS) is a molecular binding assay for proteins, peptides, and other small molecules that is built on a next-generation seq...
Article
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Objective MicroRNAs (miRNAs) targeting has been revealed to be an appealing strategy for the treatment and management of atrial fibrillation (AF). In this research, we aimed to explore the mechanisms of miR-205-5p in reducing the high-fat diet (HFD)-induced atrial fibrosis through the EHMT2/IGFBP3 axis. Methods Expression levels of miR-205-5p, IGF...
Article
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A low-power, low-noise, and high-bandwidth magnetometer that utilizes the magnetoimpedance (MI) element as a sensor head is presented. The MI element has a high sensitivity, and it can be implemented in the mm-scale through the MEMS process. The analog front-end (AFE) circuit of the magnetometer includes a digital calibration scheme that automatica...
Article
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High-dimensional optical neural network is achieved by introducing an on-chip soliton microcomb source and wavelength division multiplexing technique.The programmable electro-optic nonlinear layer and optical meshes promote the implementation of a multi-layer optical neural network.Ultra-low coupling loss is realized between functional chips and fi...
Article
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Hash-based group-by and aggregation is a fundamental operator in database systems. Modern discrete GPUs (graphics processing units) have been considered to accelerate the performance. However, the data transfer through the PCIe (peripheral component interconnect express) bus would reduce gains. On recent architectures, the GPU and the CPU (central...
Chapter
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The quality parameters that must be added as breeding objectives to yield in the production environment are determined by the final usage of new cultivars. As a staple meal, the potato's nutritional content is vital. As a vegetable sold for money, its cooking quality, texture, taste, and flavour are important. Its processing quality is determined b...
Article
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Objectives: Even with excellent fixed dental prostheses (FDPs), there will be a substantial risk of biological complications, such as caries, if proper oral hygiene is not maintained. This study aimed to evaluate the risks of developing secondary caries with FDPs in relation to the patient oral hygiene status. Material and methods: Clinical and...
Article
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Backgrounds Rheumatoid arthritis (RA) is a chronic inflammatory and autoimmune disease. Current studies suggest that long noncoding RNAs (lncRNAs) may be key regulators in pathogenesis. Methods Analyzed lncRNAs and mRNAs using microarrays to find key differentially expressed lncRNAs in RA. GO and KEGG enrichment analysis together with coding non-c...
Article
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In this study, a model of micro-milling cutting forces based on elementary cutting experiments is developed. Elementary cutting tests were used to identify the parameters of a new model that includes the uncut chip thickness and the effect of the cutting edge radius. This model assumes a straight cutting edge and a rigid cutting tool and is divided...
Article
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The aim of the study was to investigate the actual axle loads of vehicles used for the transport of sawmill by-products, resulting from the total weight of the transport set (GVW) at different times of the year and depending on the type of sets and transported assortment. Sawmill by-product loads were divided into groups: wood chips, sawdust, slabs...
Book
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Forming processes are among the most important and the main process in making a part. Designing a suitable mold for the process has a significant impact on both the quality of the final product and its price. For this reason, it is necessary to first know the important parameters in the process. In this book, the analysis of different forming metho...
Article
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An exchanged-biased anisotropic magnetoresistance bridge sensor for low currents measurement is designed and implemented. The sensor has a simple construction (single mask) and is based on results from micromagnetic simulations. For increasing the sensitivity of the sensor, the magnetic field generated by the measurement current passing through the...
Article
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Detecting physiological levels of neurotransmitters in biological samples can advance our understanding of brain disorders and lead to improved diagnostics and therapeutics. However, neurotransmitter sensors for real-world applications must reliably detect low concentrations of target analytes from small volume working samples. Herein, a platform f...
Article
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A collection of 46 pea ( Pisum sativum L.) accessions, mostly from Europe, were analysed for genetic diversity using the GenoPea 13.2 K SNP Array chip. Of these accessions were 24 nomal-leaved and 22 semi-leafless. Principal components analysis (PCA) separated the peas into two groups characterized by the two different leaf types, although some gen...
Article
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Correction for ‘Tailored point-of-care biosensors for liquid biopsy in the field of oncology’ by Sima Singh et al. , Lab Chip , 2022, https://doi.org/10.1039/d2lc00666a.
Article
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Carbon fiber–reinforced plastics (CFRP)/titanium alloy (Ti) stacks are extensively applied in the aerospace industry due to their excellent mechanical properties. However, their poor machinability poses great challenges. In this study, longitudinal-torsional ultrasonic vibration drilling (LT-UVD) is innovatively introduced to improve the quality of...
Article
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This work reports a phase difference modulated coupling of two surface plasmon polariton (SPP) sources in a symmetrical two-channel metal-insulator-metal (MIM) waveguide device. In the device, two sources with different initial phases interact indirectly through the function of a rectangular cavity. With the phase difference varying, we have achiev...
Article
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Fc γ receptors (FcγRs) are one of the structures that can initiate effector function for monoclonal antibodies. FcγRIa has the highest affinity toward IgG1-type monoclonal antibodies among all FcγRs. In this study, a comprehensive characterization was performed for FcγRIa as a potential affinity ligand for IgG1-type monoclonal antibody binding. The...
Article
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In this study, a high-speed four-level pulse amplitude modulation (PAM-4) vertical-cavity surface-emitting laser (VCSEL) diode driver circuit is implemented in Taiwan Semiconductor Manufacturing Company 90-nm complementary metal–oxide–semiconductor technology. The laser diode driver (LDD) can input directly two non-return-to-zero signals to synthes...
Poster
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A TARUMÃ é a primeira estação experimental da linha de luz CARNAÚBA do Sirius/LNLS, cobrindo raios-X na faixa de energia de 2,05 a 15 keV e possuindo um ambiente de amostras modular que permite a realização de técnicas in-situ. Um desses ambientes de amostra visa o estudo operando de um dispositivo para geração de energia solar a partir de células...
Article
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Ultra-precision milling with an aerostatic high-speed spindle and a single-crystal diamond micro-tool is promising for the fabrication of miniaturized complex parts. While tool chatter occurring in milling processes has a substantial effect on the machined surface formation, a fundamental understanding of the tool chatter behavior in ultra-precisio...
Article
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Embedded three-dimensional (3-D) metal-insulator-metal (MIM) decoupling capacitors with high-κ dielectric films of high capacitance and long-life time are increasingly needed on integrated chips. Towards achieving better electrical performance, there is a need for investigation into the influence of the variation in atomic layer deposition (ALD) pa...
Chapter
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In the field of instrumentation, sensors are playing a very important role. Presently, most of the sensors used are smart. In case of smart sensors, the sensing elements and the related electronics are integrated on the same chip. So, the integration of electronics and sensors for creating an intelligent sensor is known as a smart sensor. Smart sen...
Article
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Time-correlated photon pairs are generated by triply resonant four-wave-mixing in an In0.5Ga0.5P photonic crystal cavity. Maximal efficiency is reached by actively compensating for the residual spectral misalignment of the cavity modes. The generation rate reaches 5 MHz in cavities with a Q-factor ≈4×104, more than one order of magnitude larger tha...
Article
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Lateral flow in microfluidic channels are of utmost importance. They are the main mechanism and/or challenge in many microfluidic applications. Despite this, there is a dearth of design rule of thumbs or mathematical models to predict the characteristics of the lateral flow. The lateral flow can be either caused by channel geometry or flowing fluid...