We propose an algorithm that obtains the top-k list of items out of a larger itemset, using human workers (e.g., through crowdsourcing) to perform comparisons among items. An example application is finding the best photographs in a large collection by asking humans to evaluate different photos. Our algorithm has to address several challenges: obtaining worker input has high latency; workers may...

Self-powered human-interactive but invisible electronics have many applications in anti-theft and anti-fake systems for human society. In this work, for the first time, we demonstrate a transparent paper-based, self-powered, and human-interactive flexible system. The system is based on an electrostatic induction mechanism with no extra power system appended. The self-powered, transparent paper ...

The transition in the boundary-layer flow affects hydrodynamic performances of hydraulic machineries, as key components ship propulsion system. shear stress transfer (SST) γ-Reθt model is an important prediction tool boundary layer simulation for hydrofoils. present paper improves accuracy SST layers along a curved hydrofoil. flows hydrofoil improved by introducing correction to onset Reynolds ...

utilizing the gathered failure data and failure interval data from tabas coal mine in two years, this paper discusses the reliability of powered supports. the data sets were investigated using statistical procedures and in two levels: the existence of trend and serial correlation. the results show that the powered supports follow the gamma reliability function. the reliability of the machine de...

Abstract In hydraulic equipment, tip clearance may result in a leakage vortex known as (TLV), which reduces the machinery’s energy efficiency. order to lessen damage brought on by clearance, this research sets angle, location, spacing, and depth of grooves significant criteria. The orthogonal approach is used design hydrofoil’s grooves. Numerous simulations are carried out using SST k-turbulenc...

Unsteady vortex shedding at a trailing edge may cause pressure fluctuations and strong tonal noise which can have important consequences to the performance of marine and aeronautical type lifting surfaces. This paper presents data from unsteady RANS simulation of high Reynolds number trailing edge flow. It aims to identify and quantify dominant features of the trailing edge flow field over a tw...