scholarly journals A dual-mode mobile phone microscope using the onboard camera flash and ambient light

2017 ◽  
Author(s):  
A. Orth ◽  
E. R. Wilson ◽  
J. G. Thompson ◽  
B. C. Gibson
Keyword(s):  
Mobile Phone ◽  
Mammalian Cells ◽  
Point Of Care ◽  
Assembly Process ◽  
Ambient Light ◽  
Cell Nuclei ◽  
Dual Mode ◽  
Darkfield Imaging ◽  
And Performance ◽  
Illumination Source

ABSTRACTMobile phone microscopes are a natural platform for point-of-care imaging, but current solutions require an externally powered illumination source, thereby adding bulk and cost. We present a mobile phone microscope that uses the internal flash or sunlight as the illumination source, thereby reducing complexity whilst maintaining functionality and performance. The microscope is capable of both brightfield and darkfield imaging modes, enabling microscopic visualization of samples ranging from plant to mammalian cells. We describe the microscope design principles, assembly process, and demonstrate its imaging capabilities through the visualization of unlabelled cell nuclei to observing the motility of cattle sperm.

scholarly journals A dual-mode mobile phone microscope using the onboard camera flash and ambient light

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
A. Orth ◽  
E. R. Wilson ◽  
J. G. Thompson ◽  
B. C. Gibson
Keyword(s):  
Mobile Phone ◽  
Ambient Light ◽  
Dual Mode

scholarly journals Novel Hexagonal Dual-Mode Substrate Integrated Waveguide Filter with Source-Load Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Ziqiang Xu ◽  
Gen Zhang ◽  
Hong Xia ◽  
Meijuan Xu
Keyword(s):  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Cavity Structure ◽  
Waveguide Filter ◽  
And Performance ◽  
Single Cavity ◽  
Good Agreement

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transmission zeros, but also has a small size by the virtue of its single-cavity structure. A demonstration filter with a center frequency of 10 GHz and a 3 dB fractional bandwidth of 4% is designed and fabricated to validate the proposed structure. Measured results are in good agreement with simulated ones.

Liquid Metal Ink Enabled Rapid Prototyping of Electrochemical Sensor for Wireless Glucose Detection on the Platform of Mobile Phone

2015 ◽  
Vol 9 (4) ◽  
Author(s):  
Liting Yi ◽  
Jingjing Li ◽  
Cangran Guo ◽  
Lei Li ◽  
Jing Liu
Keyword(s):  
Liquid Metal ◽  
Mobile Phone ◽  
Detection System ◽  
Point Of Care ◽  
Low Cost ◽  
Smart Phone ◽  
Disease Diagnosis ◽  
Glucose Detection ◽  
Sensor Material ◽  
Liquid Metal Ink

Pervasive detection of blood glucose is rather critical for the real-time disease diagnosis which would provide valuable guidance for treatment planning. Here, we established a health care platform for this purpose through incorporating the glucose detection with liquid metal printed sensor and the smart phone monitoring system together. The liquid metal ink composed of bismuth indium stannic (BIS) alloy was identified as an appropriate sensor material to be quickly written or printed on polyvinyl chloride (PVC) substrate at around 59 °C to form desired electrodes. It thus eliminated the complicated procedures as usually required in conventional sensor fabrication strategies. The alloy electrodes were characterized via cyclic voltammetry to demonstrate their practical functionality. Further, unlike using the commonly adopted glucometer, a smart phone was developed as the data acquisition and display center to help improve the portability and ubiquitous virtue of the detection system. Glucose solution in different concentrations was assayed via this platform. It was shown that there is a good linear relationship between the concentration and the integral value of the curve recorded by the mobile phone, which confirms the feasibility of the present method. This quantitative point-of-care system has pervasive feature and is expected to be very useful for future low-cost electrochemical detection.

Micro to Macro Social Connectedness Through Mobile Phone Engagement

2019 ◽  
pp. 995-1007
Author(s):  
Dominic Mentor
Keyword(s):  
Social Media ◽  
Mobile Phone ◽  
Interpersonal Relationships ◽  
Social Connectedness ◽  
Peer Group ◽  
Emotional Wellbeing ◽  
Media Access ◽  
Face To Face ◽  
Social Media Networks ◽  
And Performance

The literature on social connectedness through mobile phone engagement reveals positive tacit opportunities. Mobile phone engagement hosts micro and macro opportunities to start and maintain a sense of social connectedness. Increasing a sense of social connectedness encourages healthier emotional wellbeing among people, reducing potential feelings of isolation and chances of faster recovery from illness. Mobile social media access, participation, and messaging, be it face-to-face, peer-to-peer, group, or virtual, through intentional and unintentional social connectedness, may aid the improvement and performance among workers, students, and campaigns. Mobile engagement also offers possible improvement in performance and enhanced perceptions of emotional wellbeing. Engagement through social media networks, mostly accessed via mobile, including mobile gaming, or health monitoring, commenting or posting photos or short texts, increases the production and value of successful maintenance of reciprocal interpersonal relationships.

scholarly journals Biosensors for the Detection of Bacterial and Viral Clinical Pathogens

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6926
Author(s):  
Luis Castillo-Henríquez ◽  
Mariana Brenes-Acuña ◽  
Arianna Castro-Rojas ◽  
Rolando Cordero-Salmerón ◽  
Mary Lopretti-Correa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
New Technologies ◽  
Point Of Care ◽  
Graphene Quantum Dots ◽  
Electrospun Nanofibers ◽  
Comprehensive Review ◽  
Measurement Devices ◽  
Clinical Pathogens ◽  
And Performance ◽  
The One

Biosensors are measurement devices that can sense several biomolecules, and are widely used for the detection of relevant clinical pathogens such as bacteria and viruses, showing outstanding results. Because of the latent existing risk of facing another pandemic like the one we are living through due to COVID-19, researchers are constantly looking forward to developing new technologies for diagnosis and treatment of infections caused by different bacteria and viruses. Regarding that, nanotechnology has improved biosensors’ design and performance through the development of materials and nanoparticles that enhance their affinity, selectivity, and efficacy in detecting these pathogens, such as employing nanoparticles, graphene quantum dots, and electrospun nanofibers. Therefore, this work aims to present a comprehensive review that exposes how biosensors work in terms of bacterial and viral detection, and the nanotechnological features that are contributing to achieving a faster yet still efficient COVID-19 diagnosis at the point-of-care.

Dynamic Pricing Based on Net Cost for Mobile Content Services

2007 ◽  
pp. 220-226
Author(s):  
N. Srikhutkhao
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Dynamic Pricing ◽  
Market Price ◽  
Actual Cost ◽  
Pricing Model ◽  
Market Growth ◽  
The Past ◽  
Fixed Price ◽  
And Performance

In the past few years, the mobile phone’s performance has increased rapidly. According to IDC’s Worldwide Mobile Phone 2004-2008 Forecast and Analysis, sales of 2.5G mobile phones will drive market growth for the next several years, with sales of 3G mobile phones finally surpassing the 100 million annual unit mark in 2007. Future mobile phones can support more than 20,000 colors. With the advancements in functionality and performance of mobile phones, users will use them for all sorts of activities, and that will increase mobile content service requests. Currently, the pricing of mobile content service is up to each provider; typically they implement a fixed price called a market price because the providers do not have a formula to estimate the price according to the actual cost of their services. This article proposes a dynamic pricing model based on net cost for mobile content services.

scholarly journals A Proof of Concept of a Mobile Health Application to Support Professionals in a Portuguese Nursing Home

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3951
Author(s):  
Márcia Esteves ◽  
Marisa Esteves ◽  
António Abelha ◽  
José Machado
Keyword(s):  
Nursing Home ◽  
Nursing Homes ◽  
Mobile Health ◽  
Health Professionals ◽  
Point Of Care ◽  
Healthcare Delivery ◽  
Proof Of Concept ◽  
Mobile Health Application ◽  
And Performance

Over the past few years, the rapidly aging population has been posing several challenges to healthcare systems worldwide. Consequently, in Portugal, nursing homes have been getting a higher demand, and health professionals working in these facilities are overloaded with work. Moreover, the lack of health information and communication technology (HICT) and the use of unsophisticated methods, such as paper, in nursing homes to clinically manage residents lead to more errors and are time-consuming. Thus, this article proposes a proof of concept of a mobile health (mHealth) application developed for the health professionals working in a Portuguese nursing home to support them at the point-of-care, namely to manage and have access to information and to help them schedule, perform, and digitally record their tasks. Additionally, clinical and performance business intelligence (BI) indicators to assist the decision-making process are also defined. Thereby, this solution aims to introduce technological improvements into the facility to improve healthcare delivery and, by taking advantage of the benefits provided by these improvements, lessen some of the workload experienced by health professionals, reduce time-waste and errors, and, ultimately, enhance elders’ quality of life and improve the quality of the services provided.

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