Realistic Job Preview as an Alternative Tool to Improve Student Readiness for Online Learning

Readiness for online learning has been established as a key component of student success in online classes. In addition, the COVID-19 pandemic has underscored how vital being prepared for online can be. This paper highlights an orientation technique widely used in the business field, namely Realistic Job Preview (RJP), as a method to prepare students for what online learning might be like. Our research proposes an RJP would help students adapt to their new role as online learners. For the purposes of this study, we developed a video providing a realistic preview of online learning following recommendations from RJP research. We then conducted a mixed methods study to examine student perceptions of our realistic preview video and an online readiness self-assessment. Overall, our findings provide strong evidence for the use of RJP as a strategy to improve student readiness for online learning.

Qualité et essais de traitement des eaux en milieu périurbain : cas des eaux de forage des cantons Légbassito et Vakpossito (Togo)

L’objectif de ce travail est de contribuer à la potabilisation des eaux de forages dans les zones périurbaines de la ville de Lomé (Togo). L’évaluation de la qualité physicochimique et bactériologique a été réalisée sur 30 échantillons en utilisant les méthodes normalisées (AFNOR). Les essais d’élimination des nitrates par le charbon actif et de désinfection par le chlore pour la détermination du break-point ont été réalisés sur les eaux de plus forte teneur en nitrate dans chaque site étudié. Les résultats des enquêtes ont montré que les forages réalisés dans les zones périurbaines sont à 95% manuels. Les forages sont souvent implantés sans orientation technique à cause de la facilité qu’offre la formation sédimentaire. La profondeur varie de 25 à 35 m. Les résultats ont montré que les forages sont réalisés dans un environnement insalubre, dépourvu d’infrastructure d’assainissement (plus de 80%). Plus de 70% des échantillons d’eaux analysés ont des pH acide (< 6,5). Quatre-vingt-dix pour cent des échantillons d’eaux analysés ont des goûts salés, 87% deséchantillons ne sont pas conFormes à aux valeurs guides de l’OMS. La concentration des nitrates (élément toxique) et le fer (élément indésirable) sont très élevés, respectivement dans les proportions de 13% et 6% des eaux de forages analysées. La totalité des échantillons analysés est contaminée par des germes indicateurs d’origine fécale. Les échantillons d’eaux analysés ne sont pas conformes aux normes de potabilité des eaux de consommation. La contamination serait due prioritairement aux techniques de « foration » et à la maintenance périodique de la pompe. Les essais de traitement par le charbon actif et le chlore se sont révélés efficaces et constitueraient une des mesures à prendre en compte dans le traitement des eaux. Mots clés : Eau de forage, contamination, traitement, charbon actif, chlore. English title: Quality and testing of water treatment in peri-urban areas: case of borehole water in the Légbassito and Vakpossito cantons (Togo)The target of this study is to have a part in the preservation of sinking waters of Lomé city’s suburbs areas. (Togo). The assessment of physicochemical quality and bacteriological has been carried out on 30 samples using standardized methods (AFNOR). Nitrate elimination tests with activated charcoal and disinfecting chlorine for break-point determination have been carried out on waters of high nitrate content on each studied site. Surveys’ results have shown that sinking, carried out in the suburbs’ areas are of 95% manuals. Sinkings are often done without technical orientation due to the easy layer of sedimentary formation. The depth varies from 25 to 35 m. Results showed that sinkings are carried out (over 80%) in an unhealthy environment devoid of sanitation infrastructures. The pH is mostly acid (< 6,5). Waters are salted (about 90%) and 87% of samples are not standard to the WHO recommended values. Nitrates concentration (toxic element) and the iron (undesirable element) are very high, respectively in the proportions of 13% and 6% of tested sinking waters. The whole of tested samples are contaminated by germ indicators from faeces. Tested water samples are not standard to preservation norms of drinking water. Contamination might have resulted as a priority from « foration » techniques and periodic maintenance of the pump. Tests treatment with activated charcoal and the chlorine are effectively revealed and constitute one the measures to be taken into account in water-processing.Keywords: Water sinking, contamination, processing, activated charcoal, chlorine

Investigation of spider web oriented composite fabrics burst strength

<abstract> <p>Burst strength is a significant property that determines all other properties of structures to perform under induced internal pressure. In this study, the burst strength of a spider web-formed fabric structure is experimentally investigated. The spider web form orientation is prepared using Embroidery machine. A spider web develops a self-stressing nature, which offers its excellent inelasticity and provides a mechanism for competent and economical means to harmonize the local and global induced stresses in their structure. The obtained results are compared with published works on different effects of fiber architectures. The burst test result on spider web form indicated a spider web form's potential candidacy to utilize it as a future fiber orientation technique to form an enhanced composite reinforcement. However, fiber orientation influences the fiber-reinforced composite's mechanical properties. Fiber orientation via spider web form has not yet been used as a reinforcing engineering composite product. Hence, conducting rigors experimental work on spider web form reinforced composite structures can be taken as a significant step to fill the research gap.</p> </abstract>

Fabrication of c-Axis-Oriented Zeolite L Seed Layer on Porous Zirconia Substrate by Electrophoretic Deposition in Strong Magnetic Field

Orientation technique based on the magneto-scientific crystal alignment phenomenon combined with electrophoretic deposition (EPD) technique was applied for the seeding process of zeolite L particles. Well-dispersed, ethanol-based zeolite L suspension was prepared and then consolidated on porous zirconia substrates by EPD. Conducting polypyrrole film synthesized on the zirconia substrate was used as an anodic substrate for the EPD process. The EPD was performed in a superconducting magnet with applying 12 T strong magnetic field to the suspension. The degree of orientation was characterized by XRD and compared with that of the zeolite L layer prepared by slip casting in a 12 T strong magnetic field using the same suspension.

A Novel Fault Orientation Technique of FPGA Configurable Logic Blocks Based on Improved Shift Register

With the development of digital integrate circuit system which is based on Field Programmable Gate Arrays (FPGA), the request on FPGA test technique is becoming higher and higher. The Boundary Scan Technique and Built-In Self-Test (BIST) technique appear in succession, however, these techniques dont implement Configurable Logic Block (CLB) fault diagnose and fault orientation. Arrays-based technique was advanced, which also have some problems about masking of faults and too many reconfiguration times. According to these problems, A Novel Shift Register-based technique for Fault Orientation of FPGA Configurable Logic Blocks was advanced. The paper analyses the design theory about core circuit configure, and has important significance impact on Fault Orientation of FPGA Configurable Logic Blocks.

Development of a Novel Artifact as a Reference for Gear Pitch Measuring Instruments

The pitch accuracy of a gear is graded on the order of 0.1 μm in ISO 1328-1; therefore, it is necessary for gear measuring instruments (GMIs) to be able to measure gears with the required high accuracy. GMIs are evaluated by measuring a calibrated gear or a gearlike artifact. It is, however, difficult to obtain a measurement uncertainty of less than 0.1 μm. The reason for this difficulty is that a gear artifact has a form error and surface roughness, and that the measurement position on the gear face differs slightly from the calibrated position. In view of this situation, we propose a novel multiball artifact (MBA), which is composed of equally spaced pitch balls, a centering ball, and a datum plane. The pitch balls are assumed to act as gear teeth by calibrating the angular pitch between the centers of each pitch ball. The centering ball and the datum plane are used to set a reference axis of the virtual gear. We manufactured an MBA with the pitch balls arranged on a curvic coupling. The angular pitch deviation between the centers of each pitch ball was calibrated using a coordinate measuring machine (CMM) and adopting the multiple-orientation technique. A master gear was also calibrated for comparison. The measurement uncertainty for the cumulative angular pitch deviation was 0.45 arc sec for the MBA and 1.58 arc sec for the master gear. The MBA could be calibrated with small uncertainty compared with the master gear. After the calibration, a virtual gear of the MBA was built using the calibration value. The virtual gear was measured using the gear-measuring software on the CMM. The measurement value was equal within the range of uncertainty of calibration value. It is verified that the superiority of the MBA to the gear artifact is due to the following reasons: (1) The balls can be manufactured with an accuracy of several tens of nanometers. (2) The calibrated result for the MBA is almost independent of a probe-positioning error because the centers of each pitch ball can be measured at multiple points. (3) In setting the reference axis, the gear artifact generally uses a datum cylinder, in contrast, the MBA uses more accurate ball.