Robust Evaluation of Diffusion-Based Adversarial Purification

We question the current evaluation practice on diffusion-based purification methods. Diffusion-based purification methods aim to remove adversarial effects from an input data point at test time. The approach gains increasing attention as an alternative to adversarial training due to the disentangling between training and testing. Well-known white-box attacks are often employed to measure the robustness of the purification. However, it is unknown whether these attacks are the most effective for the diffusion-based purification since the attacks are often tailored for adversarial training. We analyze the current practices and provide a new guideline for measuring the robustness of purification methods against adversarial attacks. Based on our analysis, we further propose a new purification strategy improving robustness compared to the current diffusion-based purification methods.Comment: Accepted by ICCV 2023, Oral presentatio

Nanocomposites of ZnS and poly-(dimethyl)-block-(phenyl)siloxane as a new high-refractive-index polymer media

In the present paper, we describe a new and original method to obtain transparent, siloxane-based composites, with high refractive index (up to 1.68). The method is based on the decomposition of Zn-siloxane, mixed with a poly-(dimethyl)-block-(phenyl)siloxane matrix in different ratios. It was found that after treatment of such mixed metal-containing polymer blend with H2S, the nanoparticles of ZnS are formed, with the size in a 1- to 5-nm range, which allow effective increase of the refractive index of the nanocomposite mixture with poly-(dimethyl)-block-(phenyl)siloxane without loss of film transparency. We succeded to increase the refractive index from 1.54 (pure matrix) up to 1.68 (composite with a ZnS content of 4.6 vol.%). The siloxane-based compositions are optically transparent, which makes it possible to use them as light-emitting diodes or solar cell sealants or adhesives

Aspire America Airlines

Inspired by their flight out to Palo Alto, this team decided to tackle the airline industry and wanted to create a better flying experience. Their airline, called Aspire America, helps business travelers arrive at their destinations refreshed and inspired. The customized interior of each plane provides spacious first-class style seating for everyone and a large work area in the tail of the plane with desks, whiteboards and digital tools for teams to collaborate before arriving at their destination. Movable flat-panel displays provide collaborative digital tools, inflight exterior video and entertainment in a flexible manner. Satellite broadband combined with onboard data services keeps data secure while helping employees to perform at their best. The workspaces are equipped with full range studio monitors for audio performance and jam sessions.This enables teams of employees to continue working, rest or otherwise find inspiration inside their reimagined take on classic jet-age travel

Melt Blown Fiber-Assisted Solvent-Free Device Fabrication at Low-Temperature

In this paper, we propose a solvent-free device fabrication method using a melt-blown (MB) fiber to minimize potential chemical and thermal damages to transition-metal-dichalcogenides (TMDCs)-based semiconductor channel. The fabrication process is composed of three steps; (1) MB fibers alignment as a shadow mask, (2) metal deposition, and (3) lifting-up MB fibers. The resulting WSe2-based p-type metal-oxide-semiconductor (PMOS) device shows an ON/OFF current ratio of ~2 × 105 (ON current of ~−40 µA) and a remarkable linear hole mobility of ~205 cm2/V·s at a drain voltage of −0.1 V. These results can be a strong evidence supporting that this MB fiber-assisted device fabrication can effectively suppress materials damage by minimizing chemical and thermal exposures. Followed by an MoS2-based n-type MOS (NMOS) device demonstration, a complementary MOS (CMOS) inverter circuit application was successfully implemented, consisted of an MoS2 NMOS and a WSe2 PMOS as a load and a driver transistor, respectively. This MB fiber-based device fabrication can be a promising method for future electronics based on chemically reactive or thermally vulnerable materials

De Novo Generation of Hybrid Ligands with an Ultra-High Affinity to Desired Targets

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구조변환 압타머: FET 기반 바이오센서의 한계 극복

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De novo selection of synthetic hACE2 mimics for binding tolerance of SARS-CoV-2 variants

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