scholarly journals Low-Cost Active Anomaly Detection with Switching Latency

2021 ◽  
Vol 11 (7) ◽  
pp. 2976
Author(s):  
Fengfan Qin ◽  
Hui Feng ◽  
Tao Yang ◽  
Bo Hu
Keyword(s):  
Resource Constraints ◽  
Low Cost ◽  
Excellent Performance ◽  
Single Observation ◽  
Asymptotic Regime ◽  
Testing Model ◽  
Cumulative Cost ◽  
Switching Delay ◽  
Noisy Observation ◽  
Inference Strategy

Consider the problem of detecting anomalies among multiple stochastic processes. Each anomaly incurs a cost per unit time until it is identified. Due to the resource constraints, the decision-maker can select one process to probe and obtain a noisy observation. Each observation and switching across processes accompany a certain time delay. Our objective is to find a sequential inference strategy that minimizes the expected cumulative cost incurred by all the anomalies during the entire detection procedure under the error constraints. We develop a deterministic policy to solve the problem within the framework of the active hypothesis testing model. We prove that the proposed algorithm is asymptotic optimal in terms of minimizing the expected cumulative costs when the ratio of the single-switching delay to the single-observation delay is much smaller than the declaration threshold and is order-optimal when the ratio is comparable to the threshold. Not only is the proposed policy optimal in the asymptotic regime, but numerical simulations also demonstrate its excellent performance in the finite regime.

scholarly journals Virtualizing AI at the Distributed Edge Towards Intelligent IoT Applications

2021 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Claudia Campolo ◽  
Giacomo Genovese ◽  
Antonio Iera ◽  
Antonella Molinaro
Keyword(s):  
Resource Constraints ◽  
Smart Cities ◽  
Traditional Approach ◽  
Low Cost ◽  
Iot Applications ◽  
Software And Hardware ◽  
Iot Devices ◽  
Consumer Devices ◽  
Hardware Platforms ◽  
Smart Factories

Several Internet of Things (IoT) applications are booming which rely on advanced artificial intelligence (AI) and, in particular, machine learning (ML) algorithms to assist the users and make decisions on their behalf in a large variety of contexts, such as smart homes, smart cities, smart factories. Although the traditional approach is to deploy such compute-intensive algorithms into the centralized cloud, the recent proliferation of low-cost, AI-powered microcontrollers and consumer devices paves the way for having the intelligence pervasively spread along the cloud-to-things continuum. The take off of such a promising vision may be hurdled by the resource constraints of IoT devices and by the heterogeneity of (mostly proprietary) AI-embedded software and hardware platforms. In this paper, we propose a solution for the AI distributed deployment at the deep edge, which lays its foundation in the IoT virtualization concept. We design a virtualization layer hosted at the network edge that is in charge of the semantic description of AI-embedded IoT devices, and, hence, it can expose as well as augment their cognitive capabilities in order to feed intelligent IoT applications. The proposal has been mainly devised with the twofold aim of (i) relieving the pressure on constrained devices that are solicited by multiple parties interested in accessing their generated data and inference, and (ii) and targeting interoperability among AI-powered platforms. A Proof-of-Concept (PoC) is provided to showcase the viability and advantages of the proposed solution.

Thermal Coagulation Device for Treating Cervical Dysplasia

2018 ◽  
Vol 26 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Ashley Langell ◽  
Timothy Pickett ◽  
Catherine Mangum ◽  
Jennwood Chen ◽  
John Langell
Keyword(s):  
Cervical Cancer ◽  
Cervical Intraepithelial Neoplasia ◽  
Resource Constraints ◽  
Low Cost ◽  
Stakeholder Analysis ◽  
Cervical Dysplasia ◽  
Intraepithelial Neoplasia ◽  
Cervical Cancer Prevention ◽  
User Centered Design ◽  
Thermal Coagulation

Background. Cervical cancer remains a leading cause of cancer-related deaths worldwide despite being a highly preventable disease. Nine out of every 10 deaths due to cervical cancer occur in developing regions with limited access to medical care and unique resource constraints. To address cervical cancer prevention within the confines of these unique limitations, our team of students and faculty advisors at the University of Utah’s Center for Medical Innovation developed a low-cost, portable technology that utilizes thermal coagulation, a form of heat ablation, to treat cervical intraepithelial neoplasia. Methods. A multidisciplinary team of students worked with clinical and industry advisors to develop a globally applicable treatment for cervical intraepithelial neoplasia through a systematic process of problem validation, stakeholder analysis, user-centered design, business plan development, and regulatory clearance. Results. Our efforts resulted in the development of a functional, self-contained, battery-operated prototype within 72 days, followed by Food and Drug Administration clearance of a finalized device within 18 months. Conclusion. Interdisciplinary university programs that leverage the capabilities of academic-industry partnerships can accelerate the development and commercialization of affordable medical technologies to solve critical global health issues.

scholarly journals Synthesis of Novel ZnO Having Cauliflower Morphology for Photocatalytic Degradation Study

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Dipak Nipane ◽  
S. R. Thakare ◽  
N. T. Khati
Keyword(s):  
Photocatalytic Degradation ◽  
Material Properties ◽  
Low Cost ◽  
Environmental Applications ◽  
Zno Nanowire ◽  
Excellent Performance ◽  
Degradation Study ◽  
Unique Material ◽  
Photocatalytic Applications

ZnO nanowire morphology has been widely studied due to its unique material properties and excellent performance in electronics, optics, and photonic. Recently, photocatalytic applications of ZnO nanowire are creating an increasing interest in the environmental applications. This paper presents a low-cost and ecofriendly synthesis of ZnO with cauliflower morphology and its effectiveness in photocatalysis.

Using Multicell Kelvin Structure for Pressure Vessel

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
P. Zhang ◽  
R. Du
Keyword(s):  
Pressure Vessel ◽  
Storage Capacity ◽  
Low Cost ◽  
Excellent Performance ◽  
Single Cylinder ◽  
Design And Manufacturing

Pressure vessel is widely used in many engineering areas. How to achieve a perfect combination of excellent performance and low cost in the design and manufacturing of a pressure vessel is, therefore, very important. Instead of a single cylinder, a multicell pressure vessel with a Kelvin structure is proposed in this paper. It is found that such structure offers not only improved safety but also extra storage capacity. This may lead to a type of pressure vessel suitable for stringent applications, even without employing costly materials.

Low-Cost Virtual Laboratory Workbench for Electronic Engineering

2010 ◽  
Vol 1 (4) ◽  
pp. 1-17
Author(s):  
Ifeyinwa E. Achumba ◽  
Djamel Azzi ◽  
James Stocker
Keyword(s):  
Resource Constraints ◽  
Low Cost ◽  
Virtual Laboratory ◽  
Electronic Engineering ◽  
Virtual Lab ◽  
Time Space ◽  
Virtual Laboratories ◽  
Laboratory Component ◽  
Undergraduate Engineering Education ◽  
Laboratory Experiences

The laboratory component of undergraduate engineering education poses challenges in resource constrained engineering faculties. The cost, time, space and physical presence requirements of the traditional (real) laboratory approach are the contributory factors. These resource constraints may mitigate the acquisition of meaningful laboratory experiences by students, which is especially true in developing countries. Virtual laboratories can be used to complement the traditional laboratory to enhance students’ laboratory experience. In extreme cases of lack of resources, the virtual lab can be used as an alternative laboratory . Although some research on the implementation of virtual laboratories has occurred, more efforts are required because of the diverse experiential needs and requirements of the engineering curriculum. This paper presents a low-cost, web-based virtual laboratory workbench for use as part of undergraduate electronic engineering courses. Some distinguishing features of the virtual workbench are that students can undertake curriculum-based laboratory activities in a realistic manner; it integrates a Bayesian Network-based assessment structure for the assessment of students’ performance; and it affords the instructor flexibility in designing laboratory exercises.

scholarly journals Minilateralism Revisited: MIKTA as Slender Diplomacy in a Multiplex World

2018 ◽  
Vol 24 (4) ◽  
pp. 475-489 ◽  
Author(s):  
Sung-Mi Kim ◽  
Sebastian Haug ◽  
Susan Harris Rimmer
Keyword(s):  
Ad Hoc ◽  
Resource Constraints ◽  
Low Cost ◽  
Value For Money ◽  
A Value ◽  
Sharing Scheme ◽  
Operational Characteristics ◽  
Member Commitment ◽  
Global Uncertainty ◽  
Foreign Ministries

Abstract Based on over seventy interviews with diplomats and experts from all five MIKTA member countries, we find that MIKTA is used as a value-for-money minilateral mechanism for the world’s lesser powers grappling with the heightened global uncertainty and deepening interdependency. MIKTA foreign ministries have used the group as an ad hoc capacity-building and network-sharing scheme; and as a low-cost toolkit to diversify their traditional diplomatic channels and increase global visibility in various multilateral forums. However, MIKTA’s flexible, but precarious, institutional realities also suggest that minilateral arrangements that share MIKTA’s operational characteristics are likely to be short-lived and suffer from weak member commitment, resource constraints, forum-shopping risks, and a leadership vacuum.

scholarly journals Toward Respiratory Support of Critically Ill COVID-19 Patients Using Repurposed Kidney Hollow Fiber Membrane Dialysers to Oxygenate the Blood

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
David M. Rubin ◽  
Neil T. Stacey ◽  
Tonderayi Matambo ◽  
Claudia Do Vale ◽  
Martin J. Sussman ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Hollow Fiber ◽  
Oxygen Transfer ◽  
Resource Constraints ◽  
Hollow Fiber Membrane ◽  
Low Cost ◽  
Venous Access ◽  
Respiratory Support ◽  
Fiber Membrane ◽  
Polysulfone Membrane

The COVID-19 pandemic has highlighted resource constraints in respiratory support. The oxygen transfer characteristics of a specific hollow fiber membrane dialyser was investigated with a view to repurposing the device as a low-cost, readily available blood oxygenator. Oxygen transfer in a low-flux hollow fiber dialyser with a polysulfone membrane was studied by passing first water and then blood through the dialyser in countercurrent to high-purity oxygen. Oxygen transfer rates of about 15% of the nominal 250 ml (STP)/min of a typical adult oxygen consumption rate were achieved for blood flow rates of 500 ml/min. Using two such dialysis devices in parallel could provide up to 30% of the nominal oxygen consumption. Specific hollow fiber dialysis devices operating with suitable pumps in a veno-venous access configuration could provide a cost-effective and readily available supplementation of respiratory support in the face of severe resource constraints.

Efficient and Robust Approach for Heartbeat Detection of ECG Signal

2019 ◽  
Vol 29 (08) ◽  
pp. 2050133
Author(s):  
Anas Fouad Ahmed ◽  
Mohammed Abdulmunem Ahmed ◽  
Hussain Mustafa Bierk
Keyword(s):  
Real Time ◽  
Low Cost ◽  
Suggested Method ◽  
The Other ◽  
Ecg Signal ◽  
Excellent Performance ◽  
Robust Approach ◽  
Different Types ◽  
Three Stages ◽  
Electrocardiogram Ecg

This paper introduces an efficient and robust method for heartbeat detection based on the calculated angles between the successive samples of electrocardiogram (ECG) signal. The proposed approach involves three stages: filtering, computing the angles of the signal and thresholding. The suggested method is applied to two different types of ECG databases (QTDB and MIT-BIH). The results were compared with the other algorithms suggested in previous works. The proposed approach outperformed the other algorithms, in spite of its simplicity and their fast calculations. These features make it applicable in real-time ECG diagnostics systems. The suggested method was implemented in real-time using a low cost ECG acquisition system and it shows excellent performance.

Advances in High-Purity Alumina and Resource Distribution

2014 ◽  
Vol 926-930 ◽  
pp. 36-39
Author(s):  
Min Xian Du ◽  
Ke Liang Chen ◽  
Yong Gang Xiong
Keyword(s):  
Sustainable Development ◽  
High Purity ◽  
Low Cost ◽  
Resource Distribution ◽  
High Tech ◽  
Alumina Powder ◽  
Preparation Process ◽  
Excellent Performance ◽  
Preparation Methods

High-purity alumina has excellent performance and wide application in high-tech industries and areas of modern materials, so industrialized, low-cost, non-polluting and sustainable development preparation process has become one of the priorities of present high-purity alumina powder research. The use of high purity alumina and its major domestic craft preparation methods are described in the paper.

Porous micro-spherical LiFePO4/CNT nanocomposite for high-performance Li-ion battery cathode material

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37830-37836 ◽  
Author(s):  
Wei Wei ◽  
Linlin Guo ◽  
Xiaoyang Qiu ◽  
Peng Qu ◽  
Maotian Xu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Scale Production ◽  
Li Ion Battery ◽  
Excellent Performance ◽  
Large Scale Production ◽  
Li Ion

Although many routes have been developed that can efficiently improve the electrochemical performance of LiFePO4 cathodes, few of them meet the urgent industrial requirements of large-scale production, low cost and excellent performance.

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