OPAC - Pencarian Artikel Jurnal & Majalah Library USD
Menampilkan semua artikel (Halaman 722 dari 34166, Total: 341652 data)
Toward Cloud-Assisted Industrial IoT Platform for Large-Scale Continuous Condition Monitoring
klik untuk membaca file PDF
| Pengarang | : | Soehardjo Sastrosoehardjo |
| Nama Majalah/Jurnal | : | Proceedings of the IEEE |
| Volume / Edisi | : | 107 (No. 6) |
| Halaman | : | 1193-1205 |
| Abstrak | : | Process industries cover a wide set of industries, in which the processes are controlled by a combination of distributed control systems (DCSs) and programmable logic controllers (PLCs). These control systems utilize various measurements such as pressure, flow, and temperature to determine the state of the process and then use field devices such as valves and other actuating devices to manipulate the process. Since there are many different types of field devices and since each device is calibrated to its specific installation, when monitoring devices, it is important to be able to transfer not only the device measurement and diagnostics but also characteristics about the device and the process in which it is installed. The current monitoring architecture, however, creates challenges for continuous monitoring and analysis of diagnostic data. In this paper, we present the design of an Industrial Internet-of-Things (IIoT) system for supporting large-scale and continuous device condition monitoring and analysis in process control systems. The system design seamlessly integrates existing infrastructure [e.g., highway addressable remote transducer (HART) and WirelessHART networks, and DeltaV DCS] and newly developed hardware/software components (e.g., one-way data diode and IoT cellular architecture) together for control network data collection and streaming of the collected device diagnostic parameters to a private cloud to perform streaming data analytics designed for fault identification and prediction. A prototype system has been developed and supported by Emerson Automation Solutions and deployed in the field for design validation and long-term performance evaluation. To the best of our knowledge, this is the first ever publicly reported effort on IoT system design for process automation applications. The design can be readily extended for condition monitoring and analysis of many other industrial facilities and processes. |
Implementing Raspberry Pi 3 and Python in the Physics Laboratory Available to Purchase
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 134-135 |
| Abstrak | : | Many physics projects recently designed for high school teachers use Arduino as the main tool for managing sensors and data acquisition. This is a low-cost integrated development environment programmed with a simplified version of the C++ language. In comparison, the Raspberry Pi 3 platform, which also allows for the design of physics projects, can expose students to the use of the most trending language in the field: Python. With this in mind, we have developed a project to measure the acceleration of objects due to gravity near the Earth’s surface using a Raspberry Pi 3 computer and Python as the programming language. It utilizes an infrared sensor connected to the Raspberry Pi 3, a monitor with an HDMI connection, a mouse, and a keyboard. The experiment yields results with a percentage difference of 2.8% on average for an estimated value of the gravitational acceleration of 9.8?m/s2. |
Kepler Made Me Do It
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 130-133 |
| Abstrak | : | When our school implemented AP Physics 1, I wanted to include a project that would extend over time, use more advanced data analysis, and teach students about handling experimental error. Using a donated 5-inch Newtonian telescope and an entry-level digital camera, the students gathered data from digital images of the four Galilean moons, Io, Europa, Ganymede, and Callisto (see Fig. 1), to verify Kepler’s third law of planetary motion (T2=Kr3). Simulation software could have been used. Among others, Project CLEA (Contemporary Laboratory Experiences in Astronomy) seems to be a favorite that includes verifying Kepler’s third law using the orbits of the Galilean moons. Galileo measured the moons’ periods with his telescope. My students could do the same with modern equipment. The investigation started with a purely Keplerian analysis of the data, then to a Newtonian analysis leading to accurate orbital properties of the Galilean moons and Jupiter’s mass. Once the images have been obtained, they can be used each year. |
The Rematch of the Tortoise and the Hare: A Story of Speed and Velocity
| Pengarang | : | Viera, Flavia |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 128-129 |
| Abstrak | : | In traditional introductory physics courses, concepts of distance, displacement, speed, velocity, scalars, and vectors are generally taught near the beginning of the course. However, students often contend with preexisting notions, such as the idea that speed and velocity are synonyms, which present some of the first conceptual hurdles that they face. “The Rematch of the Tortoise and the Hare” (provided below) offers a modern sequel to an ancient fable, and has been used to successfully help students differentiate between average speed and average velocity where traditional instruction has failed. |
Archimedes’ Balance Approach Applied to Buoyant Force
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 125-127 |
| Abstrak | : | The floating and sinking phenomenon related to buoyant force can readily be observed in everyday life and easily demonstrated to young students. However, many students believe that the buoyant force is determined by the object’s attributes, such as the shape (e.g., ship) or material (e.g., wood). As a result, students find it challenging to understand that buoyant force changes when different volumes of the same object are submerged in water, or when the same object is submerged in different fluids. In response to the question concerning whether the weight of a cup changes when a tea bag is placed in a cup of water, 63.3% of first-year university students who majored in physics or chemistry were wrong. The problems related to buoyant force are difficult to understand even for college students, so the topic is used in the selection process for gifted students. Although numerous educational attempts have been made to help students understand the concept, buoyant force is still a difficult concept for them. Thus, an easy and clear approach to help students understand the buoyant force is desirable. |
Systematic Problem Authoring: Constant Acceleration and Projectile Motion
| Pengarang | : | Kraisler, Joseph [et al...] |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 122-124 |
| Abstrak | : | When authoring physics problems, professors may develop an intuition for how much information they need to provide such that the problem has a unique answer and is not over constrained. It is an open question as to whether using intuition leads to a sufficiently broad range of problems. In this paper we discuss a systematic way of authoring problems to guarantee that problems are fully constrained and that all possible variations of certain classes of problems are explored. |
Conservation of Momentum with Dual Technologies
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 120-121 |
| Abstrak | : | The law of conservation of momentum can be applied to a wide range of processes whether it is the collision of subatomic particles, rocket propulsion, or the recoil of a cannon. In this experiment two technologies, the Arduino microcontroller and a PASCO smart cart, are used to create a movable rubber band launcher. The Arduino microcontroller is programmed to turn a servo motor through switch activation to release the rubber band. While the rubber band moves in one direction, the cart recoils and moves in the opposite direction, all being a consequence of the conservation of momentum. A suitable analysis of the experimental data produces values for the initial kinetic energy of the launched rubber band and the energy transferred by the system. |
Wireless Network Design for Emerging IIoT Applications: Reference Framework and Use Cases
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Proceedings of the IEEE |
| Volume / Edisi | : | 107 (No. 6) |
| Halaman | : | 1166-1192 |
| Abstrak | : | Industrial Internet-of-Things (IIoT) applications, featured with data-centric innovations, are leveraging the observability, control, and analytics, as well as the safety of industrial operations. In IIoT deployments, wireless links are increasingly used in improving the operational connectivity for industrial data services, such as collecting massive process data, communicating with industrial robots, and tracking machines/parts/products on the factory floor and beyond. Wireless system design for IIoT applications is inherently a joint effort among operational technology (OT) engineers, information technology (IT) system architects, and wireless network planners. In this paper, we propose a new reference framework for wireless system design in IIoT use cases. The framework presents a generic design process and identifies the key questions and tools of individual procedures. Specifically, we extract impact factors from distinct domains including industrial operations and environments, data service dynamics, and the IT infrastructure. We then map these factors into function clusters and discuss their respective impact on performance metrics and resource utilization strategies. Finally, discussions take place in four exemplary IIoT applications where we use the framework to identify wireless network issues and deployment features in the continuous process monitoring, discrete system control, mobile applications, and spectrum harmonization, respectively. The goals of this paper are twofold: 1) to assist OT engineers to better recognize wireless communication demands and challenges in their plants and 2) to help industrial IT specialists to come up with operative and efficient end-to-end wireless solutions to meet demanding needs in factory environments. |
Sliding on an Arbitrarily Shaped Incline with Friction Available to Purchase
| Pengarang | : | Yasuda, Sachiko |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 117-119 |
| Abstrak | : | Friction is one of the most important forces studied in classical mechanics, and still is the subject of pedagogical literature. In a small series of problems stated below, we consider a particle sliding down a curve under the actions of gravity and kinetic friction. Unlike many of the referenced sources, we neglect the centripetal force arising on the curved portions of the incline (i.e., assume that the centripetal acceleration is much smaller than g) and, instead of parameters such as the location of the release point of a particle, concentrate on the horizontal displacement of the particle. |
Selective Assessment in Introductory Physics Labatorials
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 59 (No. 2) |
| Halaman | : | 114-116 |
| Abstrak | : | In this paper, we present a selection methodology in the physics laboratory that lowers student anxiety and is beneficial to the instructors as well. At Mount Royal University, the traditional laboratory experimental exercises were replaced by a new style of laboratory called labatorials. In our previous research work, we found that labatorials integrate communications and discussions in a friendly environment. They decrease students’ anxiety and improve self-confidence. However, there have been some challenges associated with physics labs that are not specific to labatorials such as the final lab grades of students who miss a lab. Phys1201 and Phys1202 courses at MRU are 13-week courses with around 200 first-year students each semester. There are two training sessions for the lab instructors during the first two weeks of the semester to familiarize them with labatorial goals and strategies. Due to the training sessions and to make sure that the topics of the experiments have been covered in the classroom, introductory physics laboratories start the third week of the semester. There is no lab during the reading break at MRU and we are left with 10 weeks to cover 10 labs. A lab instructor cannot control student absences, and students should not be punished for missing a lab due to illness or a family situation. Each introductory physics course is divided into three to four lecture sections and around 15 lab sections each semester. One solution was to provide opportunities for students to go to another lab section when they miss a lab. However, this solution created new challenges for both students and instructors. It was not easy to find a lab section that matches the schedule of the students missing a lab. On the other hand, at MRU there is only one lab instructor for each 16-student lab section. Some feedback we have received from students is that they would prefer groups of two or three members as most of the time not every member of every group participates. Having one more student making up a lab resulted in having a group of five and made the group activity more difficult. We had received much negative feedback from students working with a new member in groups of five. Some lab instructors excused the missing lab grade and some provided a make-up lab opportunity during a time that worked for them and the students. There are many sessional lab instructors working in our department that cannot provide opportunities for students to make up labs during a time that they do not teach. On the other hand, they are not paid for the extra two-hour make-up labs as well. Not having a consistent solution for the students missing a lab in different sections increased the number of complaints. To address this challenge and use a consistent solution applicable in all lab sections, we decided to use a common practice in the Department of Mathematics and Computing at MRU that allows students to choose the best k quiz/activity grades from the n quizzes/activities written, a policy they call selective assessment. |