Stirring it Up: Faculty Professional Development in Jamaica

Using the lens of a multidisciplinary faculty-led study abroad and service-learning program in Jamaica, this article explores faculty and student development in an international setting. Specific attention is paid to faculty and curriculum development, and some of the challenges and benefits posed by short-term study abroad programs. Themes of curricular globalization and active learning are also explored

Study on electromagnetic characteristic of sugarcane wasted fibers microwave absorber / Amir Hamzah Mohamed Rafik

Anechoic chamber use for testing electronic equipment with purpose to cancel out the noise from interfere into system. Commercial absorbers in market come out in variety shape in line with the purposed of measuring test Material used to develop pyramidal absorber made from chemical substance where pollute the environment. Alternative material been study to overcome the problem Sugarcane bagasse is normally taken out after extracting process; producing sugar or drinking used. It is found that it has potential to be reused as economical pyramidal absorber for anechoic chamber application by giving same performance as commercial absorber. In this study the parameter being measures is absorption rate by material. The sugarcane bagasse been modified and simulate using CST Microwave Studio and the pyramidal operating at frequency of range (0-12) GHz. The targeting of absorption loss is around -30dB or better. The absorption rate performance been compared with commercial absorber and pure SGB and carbon SGB. The pure SGB pyramidal absorber have good absorber performance in range frequency of 1GHz to 12GHz compare to carbon SGB pyramidal absorber. The sugarcane bagasse pyramidal absorber have potential to be used as an alternative material in developing pyramidal absorber

Identification and partial characterization of antifungal and antibacterial activities of two Bacillus sp. strains isolated from salt soil in Tunisia

Two Bacillus sp. strains (B29 and B27) isolated from soil in the South of Tunisia were tested for their abilities to produce antimicrobial compounds. Both strains showed antimicrobial activity against Gram-positive and Gram-negative bacteria, yeasts and fungi. The produced compounds were extracted by using four different solvents. The hexane solvent allowed to obtain maximum of activity of the strain B29. The activity of the strain B27 was not elucidated by the four solvents used. Bio-autography results of B29 hexane extract revealed presence of different antibiotics and antifungal compounds with different Rf values of 0.3 and 0.76 for antifungal compounds and of 0.12, 0.14, 0.19 and 0.3 for antibacterial ones. Two active fractions were isolated from the culture broth of the strain B29 by semi-preparative high performance liquid chromatography (HPLC). The partial sequencing of the 16S rDNA gene was used to identify the two Bacillus strains. They may be assigned to new Bacillus specie

Study on electromagnetic characteristic of sugarcane wasted fibers microwave absorber / Amir Hamzah Mohamed Rafik

Anechoic chamber use for testing electronic equipment with purpose to cancel out the noise from interfere into system. Commercial absorbers in market come out in variety shape in line with the purposed of measuring test Material used to develop pyramidal absorber made from chemical substance where pollute the environment. Alternative material been study to overcome the problem Sugarcane bagasse is normally taken out after extracting process; producing sugar or drinking used. It is found that it has potential to be reused as economical pyramidal absorber for anechoic chamber application by giving same performance as commercial absorber. In this study the parameter being measures is absorption rate by material. The sugarcane bagasse been modified and simulate using CST Microwave Studio and the pyramidal operating at frequency of range (0-12) GHz. The targeting of absorption loss is around -30dB or better. The absorption rate performance been compared with commercial absorber and pure SGB and carbon SGB. The pure SGB pyramidal absorber have good absorber performance in range frequency of 1GHz to 12GHz compare to carbon SGB pyramidal absorber. The sugarcane bagasse pyramidal absorber have potential to be used as an alternative material in developing pyramidal absorber

Rotation of Stresses in French Wheel Tracking Test

The main function of a pavement is to distribute the traffic-induced load over its different layers. While the flexible pavement design methods are based on a linear elastic calculation, the real behavior of the different layers is highly non-linear and elastic. They can also, in some cases, be plastic and viscous. This research aims to develop a three-dimensional numerical model that is closely similar to the test FWTT conditions. The model will have a real geometry wheel footprint (rather than a rectangular shape). As a substitute for incremental loading, the wheel movement during its passage over the specimen will be simulated by a horizontal displacement. These important characteristics of the model represent the novelty and the major difference between the current research and previous studies. The current model, which is based on the finite elements method, uses Abaqus software and a viscoelastic constitutive model. The materials' viscoelastic properties have been described by the Prony series, also called the relaxation modulus, which is a function of time. This parameter can be defined in most computer-aided engineering (CAE) software. The procedure for calculating the Prony series from experimental data is explained. The results obtained agree with the stress signal amplitude, the stress rotation principal, and the total displacement rotation when the load approaches the node considered and located in the middle of the specimen. Doi: 10.28991/CEJ-2022-08-03-03 Full Text: PD

Fuzzy Pattern Recognition Based Fault Diagnosis

International audienceIn order to avoid catastrophic situations when the dynamics of a physical system (entity in Multi Agent System architecture) are evolving toward an undesirable operating mode, particular and quick safety actions have to be programmed in the control design. Classic control (PID and even state model based methods) becomes powerless for complex plants (nonlinear, MIMO and ill-defined systems). A more efficient diagnosis requires an artificial intelligence approach. We propose in this paper the design of a Fuzzy Pattern Recognition System (FPRS) that solves, in real time, the main following problems: 1) Identification of an actual state; 2) Identification of an eventual evolution towards a failure state; 3) Diagnosis and decision-making. Simulations have been carried for a fictive complex process plant with the objective to evaluate the consistency and the performance of the proposed diagnosis philosophy. The obtained results seem to be encouraging and very promising for application to fault diagnosis of a real and complex plant process