1,294 research outputs found
Where to Meet a Driver Privately: Recommending Pick-Up Locations for Ride-Hailing Services
No full textRide-Hailing Service (RHS) has motivated the rise of innovative transportation services. It enables riders to hail a cab or private vehicle at the roadside by sending a ride request to the Ride-Hailing Service Provider (RHSP). Such a request collects rider’s real-time locations, which incur serious privacy concerns for riders. While there are many location privacy-preserving mechanisms in the literature, few of them consider mobility patterns or location semantics in RHS. In this work, we propose a pick-up location recommendation scheme with location indistinguishability and semantic indistinguishability for RHS. Specifically, we give formal definitions of location indistinguishability and semantic indistinguishability. We model the rider mobility as a time-dependent first-order Markov chain and generates a rider’s mobility profile. Next, it calculates the geographic similarity between riders by using the Mallows distance and classifies them into different geographic groups. To comprehend the semantics of a location, it extracts such information through user-generated content from two popular social networks and obtains the semantic representations of locations. Cosine similarity and unified hypergraph are used to compute the semantic similarities between locations. Finally, it outputs a set of recommended pick-up locations. To evaluate the performance, we build our mobility model over the real-world dataset GeoLife, analyze the computational costs of a rider, show the utility, and implement it on an Android smartphone. The experimental results show that it costs less than 0.12 ms to recommend 10 pick-up locations within 500 m of walking distance.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Cyber Securit
Levels and Clinical Significance of Regulatory B Cells and T Cells in Acute Myeloid Leukemia
No full textAcute myeloid leukemia (AML) is a heterogeneous hematological malignancy, whose immunological mechanisms are still partially uncovered. Regulatory B cells (Bregs) and CD4+ regulatory T cells (Tregs) are subgroups of immunoregulatory cells involved in modulating autoimmunity, inflammation, and transplantation reactions. Herein, by studying the number and function of Breg and Treg cell subsets in patients with AML, we explored their potential role in the pathogenesis of AML. Newly diagnosed AML patients, AML patients in complete remission, and healthy controls were enrolled. Flow cytometry was used to detect percentages of Bregs and Tregs. ELISA was conducted to detect IL-10 and TGF-β in plasma. The mRNA levels of IL-10 and Foxp3 were measured with RT-qPCR. The relationship of Bregs and Tregs with the clinicopathological parameters was analyzed. There was a significant reduction in the frequencies of Bregs and an increase of Tregs in newly diagnosed AML patients compared with healthy controls. Meanwhile, patients in complete remission exhibited levels of Bregs and Tregs comparable to healthy controls. Furthermore, compared with healthy controls and AML patients in complete remission, newly diagnosed AML patients had increased plasma IL-10 but reduced TGF-β. IL-10 and Foxp3 mRNA levels were upregulated in the newly diagnosed AML patients. However, there were no significant differences in IL-10 and Foxp3 mRNA levels between patients in complete remission and healthy controls. Bregs and Tregs have abnormal distribution in AML patients, suggesting that they might play an important role in regulating immune responses in AML
BETER SAFE THAN SORRY: SITUATIONAL CORRECTION IN INTERPERSONAL COMPETITION
No full textWe conducted two experiments to investigate whether situational correction occurs when interpersonal competitors make dispositional inferences from their opponent's situationally constrained behavior. In both experiments, participants who expected interpersonal competition, judged a target person's disposition after reading information about a constrained or not constrained behavior of their opponent or non-opponent. As predicted, we found that insufficient situational correction occurred when the situationally constrained behavior of the opponent reflected a disposition that implied a high threat level (competitiveness or high ability) but sufficient correction occurred when the behavior reflected a low threat-level disposition (cooperativeness or low ability). Finally, we discussed the relationship between risk-avoidance and situational correction in competition
Author Response to “Pushing the Limits of Strength Training”
No full textPhotothermal catalytic dry reforming of methane with CO₂ has emerged as a promising yet nascent strategy for mitigating greenhouse gas emissions and enabling clean energy conversion. However, achieving optimal performance requires advances in both catalyst design and mechanistic understanding. Herein, we adopted a double-emulsion-guided micelle assembly strategy to synthesize asymmetric supports (AMONs and AMOMs), featuring unidirectional open/closed pore channels. This distinctive architecture enabled the formation of an asymmetric catalyst configuration through ethylene glycol-assisted selective confinement of Ni nanoparticles at the open-pore termini. Compared to conventional symmetric catalysts, the optimized 5% Ni AMONs EG and 5% Ni AMOMs EG exhibited higher specific surface areas and improved metal dispersion, resulting in an abundance of active sites. Moreover, the asymmetric design strengthened the built-in electric fields, directing more photogenerated hot carriers and localized thermal energy toward reactant activation. Consequently, 5% Ni AMOMs EG achieved a remarkable H₂ production rate of 2314.2 mmol g⁻¹ h⁻¹ and sustained H₂ yields over 50 hours, outperforming symmetric counterparts and even some reported noble metal-based catalysts. This work offers a smart photothermal catalyst candidate and elucidates its structure–performance relationship, advancing photothermal catalytic technology for solar fuel production.Cheng Sang, Weiyi Xu, Kang Xue, Yajie Zou, Shuli Li, Shengjie Han, Haijun Chen, Hongqi Sun, Shaobin Wang, and Jinqiang Zhan
La vente d'un âne
No full textThis is 20-page pamphlet 7" x 8" in size. A singular feature of this pamphlet is its high-quality colored art. The pamphlet presents a surprising version of MSA in that it has none of the normal endings we may be used to. On the last page, the man and his son are carrying the ass and being laughed at. Key phrases in this telling are "C'est vrai" and "Elle a raison." In this version, it is the younger "Sun" who brings up the idea to the older "Sun" that they will avoid criticism if they both ride. After that approach gets criticized, they turn to carrying the ass. And that gets laughter from the local children, who say "C'est à mourir de rire!"Language note: Bilingual: French/ChineseFirst editionLi Hon
Numerical Study of a High-Temperature Latent Heat Thermal Energy Storage Device with AlSi12 Alloy
No full textThis paper explores the potential of thermal storage as an energy storage technology with cost advantages. The study uses numerical simulations to investigate the impact of adding porous material to the HTF side during solidification to improve the heat transfer effect of TES using AlSi12 alloy as the phase-change material. The research also examines the effects of adding porous dielectric materials and increasing air velocity on the discharge temperature, discharge power, and discharge time of high-temperature phase-change energy storage systems. The study found that the temperature difference of the PCM (increased), solidification time (reduced more than 85%), the outlet temperature of the air, and heat discharge power of the LHS did not vary significantly across different porous materials (copper foam, nickel foam, and silicon carbide foam) added to the HTF tube. These findings offer important information for the design of high-temperature phase-change energy storage devices and can guide future developments in this field
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