incipient stage
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2022 ◽  
Vol 6 (GROUP) ◽  
pp. 1-20
Author(s):  
Yuling Sun ◽  
Xiaojuan Ma ◽  
Kai Ye ◽  
Liang He

Crowdsourcing is rapidly gaining popularity among academic and business communities. Yet, our understanding of this work way is still in its incipient stage, in particular regarding the increasingly large and diverse crowdworkers. As such, we aim to understand crowdworkers' perception and experience to themselves and their work from their own perspective. We explore this by a mix-methods study of crowdworkers in Ali, one of prominent micro-task crowdsourcing platforms in China. Our findings highlight crowdworker in Ali is not only a coded name, but also an identity with some positive attitudes and beliefs towards work and life. In particular, this identity provides many socio-psychological benefits for crowdworkers, which further contributes to their consistent engagement in Ali and proactive practices to improve crowdworker communities and Ali platform collaboratively. We according suggest that taking crowdworker identity as a lens for crowdsourcing research, and turning attention towards construction and expressions of crowdworkers' identity and values in their own context.


Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 492
Author(s):  
Jordi-Roger Riba ◽  
Manuel Moreno-Eguilaz ◽  
Maxence Boizieau ◽  
Tamerlan Ibrayemov

Unpressurized aircraft circuits facilitate the initiation of electrical discharges in wiring systems, with consequent damage to related insulation materials and safety hazards, that can and have already caused severe incidents and accidents. Specific sensors and solutions must be developed to detect these types of faults at a very incipient stage, before further damage occurs. Electrical discharges in air generate the corona effect, which is characterized by emissions of bluish light, which are found in the ultraviolet (UV) and visible spectra. However, due to sunlight interference, the corona effect is very difficult to detect at the very initial stage, so the use of solar-blind sensors can be a possible solution. This work analyzes the feasibility of using inexpensive non-invasive solar-blind sensors in a range of pressures compatible with aircraft environments to detect the electrical discharges at a very incipient stage. Their behavior and sensitivity compared with other alternatives, i.e., an antenna sensor and a CMOS imaging sensor, is also assessed. Experimental results presented in this paper show that the analyzed solar-blind sensors can be applied for the on-line detection of electrical discharges in unpressurized aircraft environments at the very initial stage, thus facilitating and enabling the application of predictive maintenance strategies. They also offer the possibility to be combined with existing electrical protections to expand their capabilities and improve their sensitivity to detect very early discharges, thus allowing the timely identification of their occurrence.


2021 ◽  
Vol 14 (3) ◽  
pp. 25-34
Author(s):  
Benta G. Dzhashi ◽  
Sergei V. Balalin

BACKGROUND: Glaucoma remains one of the current problems of modern ophthalmology. The combination of glaucoma and cataract is observed in 1738.6% of cases, and glaucoma with pseudoexfoliative syndrome in 2050% of primary open-angle glaucoma cases. AIM: The aim of this work is to develop an effective and safe technology of complex energetic surgical treatment of the incipient primary open-angle glaucoma stage and cataract on the background of pseudoexfoliation syndrome on the basis of modified laser, hydrodynamic and ultrasound methods use. MATERIALS AND METHODS: 187 patients (187 eyes) with the incipient stage of primary open-angle glaucoma, cataract and pseudoexfoliation syndrome were examined. In the main group (111 eyes), selective laser trabeculoplasty followed by femtosecond laser-assisted cataract surgery with hydrodynamic trabeculocleaning was performed. Patients in the control group (76 eyes), after selective laser trabeculoplasty, underwent phacoemulsification according to the standard technique. RESULTS: The developed technology allowed to reach the hypotensive effect in 35.2% (t=23.0; р 0.001) of baseline intraocular pressure values, of individual intraocular pressure level without adding IOP-lowering medications in 27% of cases, stabilization of visual functions and morphometric indices of the optic disc during 2 years of follow-up in 97.3% of cases unlike the selective laser trabeculoplasty with subsequent phacoemulsification (21.2, 5.3 and 81.6% respectively). The patients of the main group had significantly lower energy expenditure during the stage of phacoemulsification, a lower percentage of postoperative inflammatory reaction was noted, and a persistent hypotensive effect with stabilization of visual functions was achieved based on the results of a two-year follow-up. CONCLUSIONS: Femtosecond laser-assisted phacoemulsification, performed as part of complex treatment in patients with cataract and incipient stage of primary open-angle glaucoma, is a sparing method that minimizes surgical trauma and achieves a persistent hypotensive effect, reduces intraocular pressure to an individual level and stabilizes visual functions in 97.3% of cases.


Author(s):  
N. Manoharan ◽  
Drorima Chatterjee ◽  
Dhruv Ashok

One of the key terms to understand the nature of violence and conflicts world over is ‘radicalisation’. Sri Lankan case is instructive in understanding various dimensions of Islamic radicalisation and de-radicalisation, especially in South Asia. Though a small state, Sri Lanka has witnessed three radical movements, the latest being Islamic that got manifested in deadly Easter attacks of April 2019. Eco-space for Islamic radicalisation existed in the island for decades, but the rise of ultra-Sinhala-Buddhist nationalism post the end of Eelam War IV acted as a breaking point. The underlying context is perceived insecurity feeling projected by hardline Sinhala-Buddhist elements. In due course, the primary ‘other’ shifted from Tamils to Sri Lankan Muslims. Apart from inter-communal dissonance, international jihadist network also fostered radicalisation process in the island’s Muslim community. Political instability due to co-habitation issues between the then president and the prime minister was a perfect distraction from the core security and development issues. In response to the violent manifestation of radicalisation, de-radicalisation measures by the successive Sri Lankan governments were mostly military in nature. Socio-economic and political components of Islamic de-radicalisation are at the incipient stage, if not totally missing. The article suggests wide-ranging measures to address the issue of radicalisation in the island state.


Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5918
Author(s):  
Maria Mitu ◽  
Codina Movileanu ◽  
Venera Giurcan

In this study, experimental measurements in a spherical combustion bomb were performed in order to investigate the flame propagation in N2-diluted CH4-N2O mixtures with stoichiometric equivalence ratio, at several initial pressures (0.5–1.75 bar) and ambient initial temperatures. Methane was chosen as a test-fuel, since it is the main component of natural gas, a fuel often used as a substitute to gasoline in engines with internal combustion and industrial plants. The method approached in this study is based on a simple examination of the cubic law of pressure rise during the early (incipient) period of flame propagation. The incipient stage defined by a pressure rise equal or smaller than the initial pressure, was divided into short time intervals. The burnt mass fractions (obtained using three different Equations) and flame radii at various moments of the flame propagation in the course of the incipient stage were calculated. The cubic law coefficients and corresponding laminar burning velocities at considered time intervals were also reported.


2021 ◽  
pp. 1-14
Author(s):  
Marianne Brandon ◽  
Nadezhda Shlykova ◽  
Abraham Morgentaler

As artificial intelligence and technology advance, mobile robots capable of human intimacy are an inevitable consequence of this progress. Such a profound shift in sexual technology will herald both advantages and disadvantages for human intimate relationships, yet a paucity of research exists on the study of human-robot sexual relationships. We believe a greater understanding of attitudes toward sex robots will be of value as this emerging technology progresses from its currently incipient stage. We conducted an online survey exploring potential gender differences in attitudes and opinions about sex robots. Survey responses were analyzed by gender, age, relationship status, relationship satisfaction and sexual satisfaction. Results confirm our hypothesis, that men report more positive reactions to sex with robots than women. Indeed, on no question did women report more enthusiasm or optimism about the arrival of sex robots than did men. This conclusion begs the question, what will sex robots mean to the future of gender relations, and in particular, sexual relationships? Engaging one another in a dialogue about the increasing impact technology will have on human intimacy can only strengthen our efforts to mold its effect into a primarily positive one. In addition, it is our expectation that dialogue about these gender differences can assist psychologists, sex therapists, anthropologists, roboticists and couples in navigating technological advancements as they increasingly impact human intimacy. Indeed, this dialogue may be increasingly urgent as the sudden and severe impact of COVID-19 raises increasing safety concerns for human/human sexual relationships.


2021 ◽  
Vol 52 (6) ◽  
pp. 168-180
Author(s):  
Pankaj Gupta ◽  
Bhagat Singh

Chatter vibration is an undesired and indispensable phenomenon in turning operation, which cannot be completely avoided. However, it can be suppressed by early identification and with the proper choice of input turning parameters. The key issue of chatter detection is to process the acquired signals and extract the features pertaining to it. In the present work, a methodology has been proposed for exploring tool chatter features in the incipient stage during turning on lathe. Chatter signals generated during the turning of Al 6061-T6 have been acquired using a microphone. A stability lobe diagram has been plotted to access the stability regime. Further, in order to study the effect of feed rate on stability, the recorded signals have been processed using a local mean decomposition signal processing technique, followed by the selection of dominating product functions using the Fourier transform. The decomposed signals have been used to evaluate the new output parameter, that is, chatter index. Further, the Nakagami probability distribution has been used to ascertain stability region (threshold). From the experimental validation, it has been inferred that cutting combinations obtained from the Nakagami probability distribution are significant and capable of limiting chatter vibrations. The present methodology will serve as guidelines to the researchers and machinist for the identification of tool chatter in the incipient stage, explore its severity, and finally suppress it with the proper selection of input turning parameters.


Author(s):  
B S Knight ◽  
J H Davies ◽  
F A Capitanio

Summary The relatively short duration of the early stages of subduction results in a poor geological record, limiting our understanding of this critical stage. Here, we utilize a 2D numerical model of incipient subduction, that is the stage after a plate margin has formed with a slab tip that extends to a shallow depth and address the conditions under which subduction continues or fails. We assess energy budgets during the evolution from incipient subduction to either a failed or successful state, showing how the growth of potential energy, and slab pull, is resisted by the viscous dissipation within the lithosphere and the mantle. The role of rheology is also investigated, as deformation mechanisms operating in the crust and mantle facilitate subduction. In all models, the onset of subduction is characterized by high lithospheric viscous dissipation and low convergence velocities, whilst successful subduction sees the mantle become the main area of viscous dissipation. In contrast, failed subduction is defined by the lithospheric viscous dissipation exceeding the lithospheric potential energy release rate and velocities tend towards zero. We show that development of a subduction zone depends on the convergence rate, required to overcome thermal diffusion and to localise deformation along the margin. The results propose a minimum convergence rate of ∼ 0.5 cm yr−1 is required to reach a successful state, with 100 km of convergence over 20 Myr, emphasizing the critical role of the incipient stage.


The project titled Designing of Fire Extinguisher Based on Sound Waves is associated with new technique of fire extinguisher. Deals with the fire fighting operations with a quick response time. The purpose of sound wave extinguisher is to find out the range of frequency within which fire can be extinguished. It helps the fire fighter to fight the fire at early stage. Fire can be extinguished between 40Hz to 60Hz and the sound wave can extinguish the fire of all types of flames. The fire suppression needs to be done at the incipient stage where the heat and flame produced by the fire is at the minimum point. The expected outcome of the project will be, to counter the fire at its initial stage for better human safety and protection.


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