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The advent of laparoscopic and robotic surgery has revolutionized many operations throughout the surgical world, leading to smaller incisions, reduced post-operative pain, shorter hospital stays, and accelerated post-surgical recovery. However, these advancements come with drawbacks such as limited accessibility, high costs, and sometimes the requirement of multiple incisions. We present an alternative approach for an open “incisionless” colostomy, using an intra-rectal Foley catheter to help identify the descending colon.

Nowadays online resources play an important role in teaching and learning thanks to new advances in technology. This importance is enhanced in scientific areas and even more for distance education universities, where the classic hands-on laboratories are not always possible. For that reason, these face-to-face laboratory practices have been replaced or even complemented with online virtual and remote laboratories (VRL). Normally, these applications are developed with high level programming tools, and these, to greater or lesser extent, use Java. Unfortunately, the newly discovered Java security issues and the impossibility to run Java in smart devices are restrictions to the dissemination of this kind of applications. This work is the first step towards get a new structure to Easy Java/Javascript Simulations (EjsS) that allows a remote connection with hardware devices using javascript. In this regard, the first objective is to solve the problems with Java applications when using EjsS. The proposed solution provides the user a structure to reuse their VRLs using a Java model that runs in a server and a Javascript graphical user interface in the client device.

This paper presents a new approach to develop a web server for remote Systems Engineering and Automatic Control laboratories based on Node.js and Easy JavaScript Simulations (EJsS). On one hand, Node.js, a JavaScript development and runtime platform to distribute non-blocking data-intensive event-driven real-time applications across different devices, is used 1) as the server that hosts the laboratory web-pages and 2) to support the real-time communication between the controller back-end (application that closes the control loop over the plant) and front-end (graphical user interface that lets students parametrize and observe the behavior of the controllers/systems under study from any web-browser). On the other one, EJsS, a powerful intuitive graphical tool to develop graphical/interactive interfaces and simulations, is used to generate the JavaScript and HTML5 controller front-end. The new strategy, deployable over different operating system (Linux, Mac OS and Windows) and against different controller back-ends (e.g. an application developed in C, a TwinCAT Programable Logic Controller, and a LabVIEW Virtual Instrument), is a lightweight versatile solution to set up a friendly remote control laboratory whose experiments can be accessed by the students from different types of devices (PCs, laptops, tablets and smartphones).

We consider a Pöschl–Teller potential R tan² (ξ) (R being a constant), which includes the infinite square well as a limiting case. After suggesting a self-contained derivation of the energy eigenstates, we show that quantum revivals occur if R permits a certain Diophantine equation to be solved.