scholarly journals LayOpt: an educational web-app for truss layout optimization

2021 ◽  
Author(s):  
Helen E. Fairclough ◽  
Linwei He ◽  
Thomas J. Pritchard ◽  
Matthew Gilbert
Keyword(s):  
Mobile Phones ◽  
Geometry Optimization ◽  
Layout Optimization ◽  
Truss Structures ◽  
Numerical Examples ◽  
Practical Engineering ◽  
Web App ◽  
Unstable Intermediate ◽  
The Web ◽  
Structural Volume

AbstractA new interactive truss layout optimization web-app has been developed for educational use. This has been designed to be used on a range of devices, from mobile phones to desktop PCs. Truss designs are first generated via numerical layout optimization and then rationalized via geometry optimization. It is then shown that these designs can be simplified using a computationally inexpensive process that allows the user to control the trade-off between complexity and structural volume. The process involves the use of smooth Heaviside representations of member existence variables, with nodal slack forces employed that allow unstable intermediate truss structures. Full details of the web-app are provided in this contribution, from underlying formulation to cloud computing implementation. A range of numerical examples are used to demonstrate the efficacy of the web-app, and to show how it can potentially be used in educational and practical engineering settings.

scholarly journals Florence RockinArt

2020 ◽  
Author(s):  
Elena Pecchioni ◽  
Alba Patrizia Santo
Keyword(s):  
Close Link ◽  
Artificial Materials ◽  
Stone Materials ◽  
Geographical Position ◽  
Web App ◽  
Materials Used ◽  
Surrounding Areas ◽  
Stone Walls ◽  
The City ◽  
The Web

The city of Firenze represents, for the variety of its artistic and architectural heritage, a kind of open-air museum. Works of art and monuments are mainly made of the rocks outcropping in Firenze and in the surrounding areas; indeed, a close link exists between monuments, geographical position of the city and its history. Florence, is characterised by the color of its stone-built cultural heritage, mainly by the warm ochraceous color of the Medieval Pietraforte sandstone and the cerulean grey of the Renaissance Pietra Serena sandstone together with other natural and artificial materials used to complete or cover the stone walls. The web-app Florence RockinArt was created to deepen the knowledge of the stone materials. It is addressed to all those who are interested in discovering the monuments of Florence by carefully observing the stone materials that make up them. The web-app contains short historical notes on the main monuments and detailed geological, mineralogical and petrographic characteristics of the natural and artificial materials of which they are constituted.

Nep-Endotrainer: A cost-effective home-made laparoscopic simulation tool

2021 ◽  
Vol 23 (2) ◽  
pp. 52-55
Author(s):  
Uttam Laudari ◽  
Deepak Mahat ◽  
Rosi Pradhan ◽  
Suyog Bhandari ◽  
Deepak Raj Singh
Keyword(s):  
Laparoscopic Surgery ◽  
Mobile Phones ◽  
Cost Effective ◽  
Simulation Tool ◽  
Drilling Machine ◽  
Web Camera ◽  
The Cost ◽  
Training Modules ◽  
Established Treatment ◽  
The Web

Introduction: Laparoscopic surgery is an established treatment modality worldwide. Opportunities to acquire this skill using expensive simulation at workplace are not always feasible due to cost, time and accessibility constraints. Nep-Endotrainer is a cost effective homemade laparoscopic simulation tool built in Nepal. Methods: Nep-Endotrainer was built using plastic manikins easily available in market. Nine apertures were created with a drilling machine, four on each side of umbilicus and one at the epigastric region. These apertures were covered by thick piece of rubber of vehicle tire with apertures in them. Logitech® C270 HD webcam was fixed interiorly with metal screws. The base of the manikin was fixed to a wooden board with hinge joint. Five different interchangeable training modules were assembled in 10×10 cm2 size wooden boards. The LED light was fixed interiorly near the web camera. The camera USB can be easily connected with laptops, tablets and mobile phones. We used discarded hand instruments from laparoscopic centers to reduce the cost of the endotrainer. Conclusion: Nep-Endotrainer is accessible to any personal budget and can be readily constructed. It allows more frequent practice at home, outside the venue and hours of surgical departments.

The Prospects of Mobile Government in Jordan

2011 ◽  
pp. 4187-4204 ◽  
Author(s):  
Ala M. Abu-Samaha ◽  
Yara Abdel Samad
Keyword(s):  
Service Delivery ◽  
Mobile Phones ◽  
Communication Channel ◽  
Electronic Government ◽  
The Internet ◽  
Electronic Service ◽  
The Future ◽  
Government Initiative ◽  
The Web

This chapter aims to assess the viability of mobile governmental services in Jordan as a precursor to embracing mobile government as a complementing medium of communication. Re?ecting on Jordan’s experience with electronic governmental services, it is evident to say that the ?rst wave of electronic governmental services was delivered through the Web as the sole communication channel. Despite the success of a number of governmental entities to utilise such a communication channel, the penetration of the Internet in the Jordanian society is very low which dampens such limited cases of success. Currently, the e-government initiative is considering mobile phones for the future waves of its electronic service delivery on a multi-channel platform. This chapter articulates the concerns and issues surrounding the viability of mobile government in terms of availability of bandwidth and reach. The chapter will provide a number of statistics and other qualitative reviews concerning previous experiences in the Jordanian electronic government initiative.

scholarly journals Layout optimization of simplified trusses using mixed integer linear programming with runtime generation of constraints

2020 ◽  
Vol 61 (5) ◽  
pp. 1977-1999
Author(s):  
H. Fairclough ◽  
M. Gilbert
Keyword(s):  
Linear Programming ◽  
Integer Linear Programming ◽  
Mixed Integer Linear Programming ◽  
Geometry Optimization ◽  
Layout Optimization ◽  
Mixed Integer ◽  
Optimal Solutions ◽  
Problem Size ◽  
Solution Quality ◽  
Starting Point

AbstractTraditional truss layout optimization employing the ground structure method will often generate layouts that are too complex to fabricate in practice. To address this, mixed integer linear programming can be used to enforce buildability constraints, leading to simplified truss forms. Limits on the number of joints in the structure and/or the minimum angle between connected members can be imposed, with the joints arising from crossover of pairs of members accounted for. However, in layout optimization, the number of constraints arising from ‘crossover joints’ increases rapidly with problem size, along with computational expense. To address this, crossover constraints are here dynamically generated and added at runtime only as required (so-called lazy constraints); speedups of more than 20 times are observed whilst ensuring that there is no loss of solution quality. Also, results from the layout optimization step are shown to provide a suitable starting point for a non-linear geometry optimization step, enabling results to be obtained that are in agreement with literature solutions. It is also shown that symmetric problems may not have symmetric optimal solutions, and that multiple distinct and equally optimal solutions may be found.

Developing an eHealth intervention for cancer symptom management for rural residents.

2016 ◽  
Vol 34 (26_suppl) ◽  
pp. 207-207 ◽  
Author(s):  
Stephanie Gilbertson-White ◽  
Chi Yeung ◽  
Keri Nace Mercer ◽  
Dorota Bartoczszyk ◽  
Todd Papke
Keyword(s):  
Palliative Care ◽  
Focus Groups ◽  
Symptom Management ◽  
Self Management ◽  
Rural Residents ◽  
Cancer Symptoms ◽  
Cancer Symptom Management ◽  
Web App ◽  
The Web

207 Background: A disproportionate number of late-stage cancer diagnoses occur in rural residents. Paradoxically this population, with an increased need for palliative care, has minimal access to these services. As smartphone and high-speed internet connectivity reaches near universal penetrance across the country, eHealth technologies have the potential to address this palliative care access gap. Oncology Associated Symptoms and Individualized Strategies (OASIS) web-app was developed to provide tailored cancer symptom self-management support and address this gap. Methods: A two-phased, mixed-methods design was used to: (1) assess stakeholder needs and opinions on the role of eHealth technologies to manage cancer symptoms; and (2) beta test a symptom self-management web-app. Adult patients with advanced cancer and clinic staff from two rural cancer clinics were recruited. A descriptive qualitative approach was used to analyze the patient interviews and staff focus groups. Themes related to symptom management needs and the role of technology were identified. OASIS was developed to address the themes found in phase 1. OASIS consists of 57 self-management strategies for 15 cancer symptoms and a visual symptom/strategy tracker for patients to monitor their symptoms and improve their self-management skills. Results: n = 15 patients were interviewed and n = 11 staff participated in focus groups. Themes identified were “fatalistic acceptance”, “teaching self how to manage symptoms”, and “balancing information needs”. To address these themes OASIS was developed and beta-tested with n = 10 rural residents with advanced cancer. 100% of participants were able to access OASIS via their home internet connection, 80% understood how to use the web-app after one 15 min teaching session, and 50% requested access to the web-app for family to help them with their symptoms. Conclusions: Patients and staff in rural communities have significant cancer symptom management needs and are interested in using eHealth technologies to address these needs. OASIS was found to be accessible, user friendly, easily navigated, and visually appealing. Future research is needed to evaluate the feasibility and acceptability as well as the efficacy of OASIS.

Geometry Optimization and Engineering Applications of Transmission Tower Foundation in the Slope

2013 ◽  
Vol 423-426 ◽  
pp. 1243-1247
Author(s):  
Bin Peng ◽  
Xing Yun Wang ◽  
Yu Wang ◽  
He Huang
Keyword(s):  
Regression Analysis ◽  
Bearing Capacity ◽  
Geometry Optimization ◽  
Ultimate Bearing Capacity ◽  
Nonlinear Regression Analysis ◽  
Transmission Tower ◽  
Engineering Applications ◽  
Practical Engineering ◽  
Tower Foundation ◽  
Pile Length

Combining with practical engineering, geometry optimization and engineering applications of transmission tower foundation in the slope is researched by using the finite-difference software FLAC3D. The variation of the pullout, vertical and horizontal ultimate bearing capacity with the diameter and length of the pile is analyzed. And optimization program of actual project is given. Research shows that when the pile length is constant, the variation of the pullout and vertical ultimate bearing capacity is increasing with the diameter increasing significantly and the horizontal ultimate bearing capacity is not significant. When the diameter is constant, the pullout, vertical and horizontal ultimate bearing capacity is increasing with the length increasing significantly. By analyzing nonlinear regression analysis of calculation data, the formula of the ultimate bearing capacity is carried out, which can consider the different pile diameters and lengths. When the gradient and distance of slopes is constant, the pullout, vertical and horizontal ultimate bearing capacity can be carried out with the formula, which can provide a reference to specification revision and engineering.

scholarly journals WHO CONTROLS THE ARAB PUBLIC SPHERE IN THE ERA OF NEW MEDIA, THE NEW REVOLUTIONISTS OR THE DEEP STATE?

2020 ◽  
Vol 12 ◽  
pp. 312-323
Author(s):  
Nawaf Abdelhay Altamimi
Keyword(s):  
New Media ◽  
Public Sphere ◽  
Social Networking ◽  
Mobile Phones ◽  
Social Networking Sites ◽  
Arab Countries ◽  
Web Based ◽  
The Public ◽  
Deep State ◽  
The Web

Recent events in Arab countries, particularly in Tunisia, Egypt have shown that new modes of communications such as Mobile phones and social networking sites have facilitated civil society's organization by allowing a timely exchange of opinions and ideas. Youth protesters in uprising societies have recognised the value of Mechanisms in which the public can meet and discuss and share ideas openly, recognise problems and suggest solutions (Caplan and Boyd, 2016). Those Young demonstrators have taken to social media such as Facebook and Twitter online to organize social prodemocracy movements and start the revolution, demonstrating how the Web-based platforms have become a crucial alternative media instrument for advocacy in today's Digital Age. (Kenix, 2009).

Sign in / Sign up

Export Citation Format

Share Document