InvVis: Large-Scale Data Embedding for Invertible Visualization

We present InvVis, a new approach for invertible visualization, which is reconstructing or further modifying a visualization from an image. InvVis allows the embedding of a significant amount of data, such as chart data, chart information, source code, etc., into visualization images. The encoded image is perceptually indistinguishable from the original one. We propose a new method to efficiently express chart data in the form of images, enabling large-capacity data embedding. We also outline a model based on the invertible neural network to achieve high-quality data concealing and revealing. We explore and implement a variety of application scenarios of InvVis. Additionally, we conduct a series of evaluation experiments to assess our method from multiple perspectives, including data embedding quality, data restoration accuracy, data encoding capacity, etc. The result of our experiments demonstrates the great potential of InvVis in invertible visualization.Comment: IEEE VIS 202

A 60GHz Wireless Access Scheme with Electrical LO Devices Free in Mobile Terminals and Base Stations

Abstract: we propose a 60GHz wireless access network scheme with centralized LO service delivered to mobile terminals and base stations from the central office. Bidirectional transmission based on the scheme has been experimentally demonstrated. OCIS codes: (060.0060) Fiber optics and optical communications; (060.2330) Fiber optics communications Introduction Due to the increasing demand for in-door, high speed wireless access networks for next generation, millimeter-wave (MM-W) wireless-over-fiber (WoF) technology has been considered as a very promising solution. However, with the increasing of the carrier frequency up to 60GHz, the diameter of the coverage area of each base station (BS) is limited within tens of meters. As a consequence, numerous electrical local oscillator (LO) devices of high frequency are required in each BS and mobile terminal (MT), incurring high system complexity and cost. Hence, cost-effective microwave photonic techniques for frequency up-conversion have been developed for system integration In this paper, we propose a new CO-BS-MT architecture to construct a bidirectional 60GHz WoF system, while providing both remote BS and MT with LO service of high-quality from the CO. For the downlink transmission, frequency up-conversion via optical beating and self-heterodyne detection techniques have been utilized to transmit and receive MM-W signals, while eliminating the use of electrical LO generators in both BS and MT. For the uplink transmission, the high-frequency LO, which is required for data up-conversion in MT and the MM-W signal downconversion in BS, is provided by the centralized LO service distributed from CO, instead of relying on electrical LO generators in MT and BS. The stability and operational parameters of LO are pre-determined and controlled in CO. A proof-of-concept experiment is carried out to demonstrate the feasibility of the proposed scheme

Endowing improved osteogenic activities with collagen membrane by incorporating biocompatible iron oxide nanoparticles

Introduction: Collagen-based scaffolds, renowned for their exceptional biocompatibility, have garnered attention as promising scaffolds for advancing bone tissue regeneration. Nevertheless, these scaffolds possess inherent limitations, such as notably compromised osteo-conductivity and osteo-inductivity.Methods: Our study focused on enhancing the mechanical properties and osteogenic bioactivities of bovine-derived collagen membranes (CMs) from the Achilles tendon by incorporating FDA-approved iron oxide nanoparticles (IONPs), termed as IONP-CM. Three types of IONP-CMs (IONP-CM-0.5, IONP-CM-1, and IONPCM-1.5) were constructed by altering the amounts of feeding IONPs.Results: Surface topography analysis demonstrated comparable characteristics between the IONP-CM and neat CM, with the former exhibiting augmented mechanical properties. In vitro evaluations revealed the remarkable biocompatibility of IONP-CMs toward mouse calvarial pre-osteoblast MC3T3-E1 cells, concurrently stimulating osteogenic differentiation. Mechanistic investigations unveiled that the osteogenic differentiation induced by IONP-CMs stemmed from the activation of the Wnt/β-catenin signaling pathway. Furthermore, in vivo bone regeneration assessment was performed by implanting IONP-CMs into the radial defect in rabbits. Results derived from micro-computed tomography and histological analyses unequivocally substantiated the capacity of IONP-CMs to expedite bone repair processes.Discussion: IONP-CMs emerged as scaffolds boasting exceptional biocompatibility and enhanced osteogenic properties, positioning them as promising candidates for facilitating bone tissue regeneration

CRAFTS for Fast Radio Bursts : extending the dispersion-fluence relation with new FRBs detected by FAST

We report three new FRBs discovered by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), namely FRB 181017.J0036+11, FRB 181118, and FRB 181130, through the Commensal Radio Astronomy FAST Survey (CRAFTS). Together with FRB 181123, which was reported earlier, all four FAST-discovered FRBs share the same characteristics of low fluence (1000 pc cm(-3)), consistent with the anticorrelation between DM and fluence of the entire FRB population. FRB 181118 and FRB 181130 exhibit band-limited features. FRB 181130 is prominently scattered (tau(s) 8 ms) at 1.25 GHz. FRB 181017.J0036+11 has full-bandwidth emission with a fluence of 0.042 Jy ms, which is one of the faintest FRB sources detected so far. CRAFTS has started to build a new sample of FRBs that fills the region for more distant and fainter FRBs in the fluence-DME diagram, previously out of reach of other surveys. The implied all-sky event rate of FRBs is 1.24(-0.90)(+1.94) x 5 sky(-1) day(-1) at the 95% confidence interval above 0.0146 Jy ms. We also demonstrate here that the probability density function of CRAFTS FRB detections is sensitive to the assumed intrinsic FRB luminosity function and cosmological evolution, which may be further constrained with more discoveries

Decision support for supply chain resilience in a risky environment: The DESIIR Project

International audienceWe define the Supply Chain Risk Management (SCRM) as a process composed of four steps : Risk identification, Risk assessment, Riskmitigation, Risk control. The first step in SCRM practices concerns the identification of risks through regular screening of potential SCrisks. Risk definition consists in four steps. 1.Categorize the risks: 2.Risk screening[U+FF0C] 3.Risk monitoring[U+FF0C] 4.Risk diagnosis. Risk assessment can be identified as the evaluation of risk’s occurrence including an estimation of its impact. The system needs to make statistics on the impact of risks and the frequency of risks through data analysis. At this time, the risk has occurred, the system will issue an alarm, and the decision support system will intervene in the decision-making of the supply chain at this time. The decision-making suggestions made by the system are divided into four types: 1. Risk avoidance; 2. Loss control; 3. Risk transfer; 4. Risk retention. The decision support system will propose decision-making plans for supply chain managers around four core strategies, and predict the subsequent impact of various suggestions. Risk control is ensured through systematic processes, preparedness, risk awareness of employees, arti-culated procedures and elaborated plans. When the decision maker makes a decision based on DSS’s recommendations, the system will track the data and various indicators of the supply chain to assess whether the impact of risk has been reduced