scholarly journals Development and evaluation of an online integrative histology module: simple design, low-cost, and improves pathology self-efficacy

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Daniel T. Schoenherr ◽  
Mary O. Dereski ◽  
Kurt D. Bernacki ◽  
Said Khayyata ◽  
Stefanie M. Attardi
Keyword(s):  
Low Cost ◽  
2018 ◽  
Vol 55 (4) ◽  
pp. 367-377 ◽  
Author(s):  
Aaron D Scher

Capacitive proximity sensors are well-suited for educational projects due to their low cost and simple design. Traditional undergraduate textbooks and lab exercises rarely highlight the fact that the performance of capacitive proximity sensors can be quite sensitive to ground loading. This paper presents a simple classroom demonstration for exploring this topic in detail. The capacitive proximity sensor for this demonstration is a hand-held LCR meter connected to a homemade capacitor composed of two strips of aluminum foil. Students explore the operation of this sensor for two different system ground configurations. In the first case the LCR meter is battery powered (floating ground referenced) and in the second case the LCR meter is powered by AC mains supply (earth ground referenced). When a student positions their hand near the foil strips, the battery-powered sensor measures an increase in capacitance. Conversely, the AC-mains-powered sensor measures a decrease in capacitance. The instructor guides students to discover for themselves the reason for this seemingly puzzling difference by modeling parasitic capacitance and ground loading using simple circuit models.


2005 ◽  
Vol 13 ◽  
pp. 958-959
Author(s):  
Will Saunders ◽  
Andrew McGrath

AbstractWe present a simple design for a 16 metre, wide-field, fixed-axis, all-reflective, low cost f/4 Schmidt telescope to take advantage of the unique advantages of Antarctica as an Optical/IR site.


eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Mototaka Suzuki ◽  
Jaan Aru ◽  
Matthew E Larkum

Intelligent behavior and cognitive functions in mammals depend on cortical microcircuits made up of a variety of excitatory and inhibitory cells that form a forest-like complex across six layers. Mechanistic understanding of cortical microcircuits requires both manipulation and monitoring of multiple layers and interactions between them. However, existing techniques are limited as to simultaneous monitoring and stimulation at different depths without damaging a large volume of cortical tissue. Here, we present a relatively simple and versatile method for delivering light to any two cortical layers simultaneously. The method uses a tiny optical probe consisting of two microprisms mounted on a single shaft. We demonstrate the versatility of the probe in three sets of experiments: first, two distinct cortical layers were optogenetically and independently manipulated; second, one layer was stimulated while the activity of another layer was monitored; third, the activity of thalamic axons distributed in two distinct cortical layers was simultaneously monitored in awake mice. Its simple-design, versatility, small-size, and low-cost allow the probe to be applied widely to address important biological questions.


2021 ◽  
Vol 12 ◽  
Author(s):  
Ricardo Primi ◽  
Daniel Santos ◽  
Oliver P. John ◽  
Filip De Fruyt

Responding to the need for school-based, broadly applicable, low-cost, and brief assessments of socio-emotional skills, we describe the conceptual background and empirical development of the SENNA inventory and provide new psychometric information on its internal structure. Data were obtained through a computerized survey from 50,000 Brazilian students enrolled in public school grades 6 to 12, spread across the entire State of São Paulo. The SENNA inventory was designed to assess 18 particular skills (e.g., empathy, responsibility, tolerance of frustration, and social initiative), each operationalized by nine items that represent three types of items: three positively keyed trait-identity items, three negatively keyed identity items, and three (always positively keyed) self-efficacy items, totaling a set of 162 items. Results show that the 18 skill constructs empirically defined a higher-order structure that we interpret as the social-emotional Big Five, labeled as Engaging with Others, Amity, Self-Management, Emotional Regulation, and Open-Mindedness. The same five factors emerged whether we assessed the 18 skills with items representing (a) a trait-identity approach that emphasizes lived skills (what do I typically do?) or (b) a self-efficacy approach that emphasizes capability (how well can I do that?). Given that its target youth group is as young as 11 years old (grade 6), a population particularly prone to the response bias of acquiescence, SENNA is also equipped to correct for individual differences in acquiescence, which are shown to systematically bias results when not corrected.


2011 ◽  
Vol 84-85 ◽  
pp. 702-705 ◽  
Author(s):  
Yan Li ◽  
Fang Feng ◽  
Wen Qiang Tian ◽  
Kotaro Tagawa

Recently, the straight-bladed vertical axis wind turbine (SB-VAWT) receives more and more attentions for its simple design, low cost, and good maintenance. The torque performance of the SB-VAWT is greatly affected by the blade airfoil. In order to research the static torque characteristics of SB-VAWT with symmetrical and non-symmetrical blade airfoil, numerical simulations by 2D CFD method were carried out on three kinds of blade airfoils including NACA0018, NACA2418 and NACA4418 at different azimuth angles. Furthermore, the static torque coefficient of the SB-VAWT with four blades with the three kinds of blade airfoils was calculated. The pressure and velocity fields were also obtained to analyze the static torque performance. Based on these results, the effects of blade airfoils on the starting torque performance of the SB-VAWT were compared and discussed.


2020 ◽  
Vol 7 (1) ◽  
pp. 18-20
Author(s):  
Ivan V. Shvorin ◽  
Tatyana S. Bernik

The article presents an analysis of existing designs of optical encoders. A new idea to improve the accuracy of measurement is proposed-the use of a projection system between the disk and the receiver. At a low cost and simple design, this gives a significant increase in the resolution of the device.


2021 ◽  
Author(s):  
N. Roostaei ◽  
S. M. Hamidi

Abstract Color blindness, or color vision deficiency (CVD), is an ocular disease that suppresses the recognition of different colors. Recently, tinted glasses and lenses have been studied as hopeful devices for color blindness correction. In this study, 2D biocompatible and flexible plasmonic lenses were fabricated using polydimethylsiloxane (PDMS) and an innovative, low-cost, and simple design based on the soft nano-lithography method. These lenses were investigated for correction of red-green (deuteranomaly) color blindness. The plasmonic lens proposed herein is based on the plasmonic surface lattice resonance (SLR) phenomenon and offers a good color filter for color blindness correction. The biocompatibility, low cost, and simple fabrication of these contact lenses can offer new insights for applications of color blindness correction.


2012 ◽  
Vol 503 ◽  
pp. 61-66 ◽  
Author(s):  
Guang Bei Li ◽  
De Yong Chen ◽  
Wen Tao He ◽  
Jun Bo Wang

An electrochemical seismic sensor (ECSS), which consists of interdigital electrodes immersed in electrolyte solution, based on MEMS technology is studied theoretically and experimentally in the paper. The output current of the sensor is employed to measure the ground motion. The device has a small size, simple design and fabrication process with low cost. Preliminary test results show that the novel electrochemical seismic sensor has satisfactory characteristics.


1992 ◽  
Vol 36 (14) ◽  
pp. 1062-1062
Author(s):  
Lee Levitan ◽  
Robert E. DeMers ◽  
Brian Schipper

Honeywell has developed a unique, motor driven, two degree of freedom hand controller that offers high levels of performance and ease of programming variables of importance for controller responsiveness and user acceptance. The simple design leads to relatively low cost and high reliability when compared with other designs. Independent motors lead to improved performance for a given motor size and ease of adding redundant motors.


2014 ◽  
Vol 629 ◽  
pp. 131-136
Author(s):  
Mohamed Tarmizi Ahmad ◽  
Sevda Ahmadian ◽  
Amzari Zhahir ◽  
Omar Kassim Ariff ◽  
Fairuz I. Romli

<p>Research in pulsejet has intensified recently due to its design simplicity that can be developed into efficient small scale propulsive units for new applications such as UAVs and Unmanned Combat Vehicles (UCAV). A major obstacle for its development is low efficiency of the engine. The objective of this research is to investigate the possibility of using pulsejet in certain applications where the pulsejet can trade its low efficiency with low cost, simple design, and light weight. Numerical analysis is used for analysing the pulsejet engine design. The main results drawn from this research is in increasing efficiency and improving performance of engine by improving size of engine, especially diameter of combustion chamber. The computed results show good resemblance with published data.</p>


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