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Statistical Study Floor Roughness Rating Depending on Nonlinear Ultrasonics within Through-Transmission and also Pulse-Echo Methods.
Standardisation of clinical teaching practices by nurse educators for undergraduate students is vital, especially within large nursing education institutions distributed over multiple campuses. This quantitative study investigated current clinical teaching practices of nurse educators at a Public College of Nursing in South Africa. A total of n = 68 nurse educators were selected from 5 campuses over a two-month period (April-May 2016), using convenience sampling. Data was collected with a structured questionnaire, the design of which was informed by the Dundee Three Circle Outcomes Model for Clinical Teaching. The results showed that 37% (n = 25) of the nurse educators had above 10 years of clinical teaching experience. Of the 66% (n = 45) who had formal education on clinical teaching practices, 49% (n = 33) received in-service education. Most nurse educators were willing to share amongst colleagues documents they used for clinical teaching, to promote standardisation of teaching practices. Further, they evidenced best clinical practices regarding planning for assessment and clinical placement of students. However, there were significant variations in the majority (seven) of the nine investigated clinical teaching practices among participants. In-service education was positively correlated to best clinical teaching practices (Chi square (d.f. = 2, n = 68) = 7.24; p = .027; V = 0.33 Medium).The persistence of fibres under outdoor conditions is seldom investigated. This research aimed to study simultaneously the influence of several factors (and their cross-interactions) on the persistence of fibres on static textile surfaces. In order to achieve this aim, a design of experiments was successfully implemented under laboratory conditions. Four factors were considered time, inclination of the recipient textile, wind speed, and rainfall. The model obtained by this supervised method was compared with the results collected under actual outdoor conditions near a weather station. The resulting model appears to be reliable as long as the values of the factors are kept within the range used in the study. The results of the laboratory tests showed that wind speed and rainfall significantly influence the persistence of fibres while time and inclination of the recipient textile have been found to be nonsignificant. In general, the observed persistence was high between 90.4 and 100%. This might be attributed to the recipient textile surface possessing abundant protruding fibres which "traps" the transferred fibres. Outdoor experiments usually suffer from a higher variability and result in a higher fibre loss. Selleck Indoximod In outdoor conditions, wind and rainfall have shown an extensive influence on the fibre persistence. Finally, the trend of fibre persistence on static textiles in outdoor conditions is generally linear with time, but extreme meteorological condition will induce exponential losses.Cannabis is classified into two types drug-type cannabis, which is abused worldwide, and fiber-type cannabis, which is used for industrial purposes. The two types are a result of differences in the sequences of tetrahydrocannabinolic acid synthase (THCAS) and cannabidiolic acid synthase (CBDAS) genes. In the present study, we aimed to establish a PCR-based method to distinguish between drug-type and fiber-type cannabis by detecting the differences in the sequences of THCAS and CBDAS. We constructed a single-plex PCR targeting active THCAS, and observed drug-type cannabis-specific amplification when using 10pg to 1ng of DNA; however, amplification was also observed in fiber-type cannabis when the DNA content reached 10ng. Similarly, single-plex PCR targeting active CBDAS showed fiber-type cannabis-specific amplification in 100pg of DNA, as well as in >1ng of drug-type cannabis DNA. Therefore, when an allele-specific duplex PCR system was constructed, in which both primer sets were mixed at an appropriate ratio, unintended nonspecific amplification was suppressed and amplicons of different sizes were observed between the drug-type and fiber-type cannabis, using DNA samples in the range of 1pg to 10ng. When the constructed duplex PCR was performed on DNA extracted from various cannabis seed samples, it was possible to distinguish between the drug-type and the fiber-type as well as detect a hybrid-type with both active THCAS and active CBDAS and a special type with neither. The identification method developed in the present study can quickly and accurately distinguish between drug-type and fiber-type cannabis, and is expected to be used for various purposes such as the detection of genetic contamination of industrial hemp as well as forensic examination of cannabis-related cases.Textile structures are considered as the main component of protective clothing against the penetration of sharp objects. In the current research work, woven fabrics reinforced with metal threads as weft yarn were designed with various weave patterns including Twill, Satin, and Hopsack, and by using a weft-backed weaving structure. The mentioned reinforced samples were produced by altering the diameter and number of metal threads in each fabric structure. Assessment of fabric resistance against bending and sharp object penetration reveals that although the application of metal thread improves the fabric resistance against sharp object penetration, it leads to an increase in the fabric stiffness. According to the results, the influence of the number of metal threads on the penetration resistance was considerably higher than the metal thread diameter. However, more increase in the fabric's bending stiffness was observed with the rise of metal thread's diameter compared to the number of metal threads. According to the obtained outcomes, weave structure is an effective parameter that changes fabric's resistance against penetration. In this regard, weave patterns with more firmness that limit the yarn movement during the indentation of the sharp object present higher protection ability. Furthermore, the increment of fabric density enhances the resistance against penetration. In this study, the resistance of two-layer samples with various orientations angle of 0°/90° and -45°/+45° were probed, as well. Outcomes confirmed that two-layer samples resist better than single-layer sample against sharp object penetration due to the formation of a grid of metal threads. Among two studied fabrics' orientation angles, the sample with the angle of -45°/+45° presents greater penetration resistance.
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