Suuline tagasiside inglise keele kui võõrkeele tundides gümnaasiumiastmes

https://www.ester.ee/record=b552057

Bring Your Own Device (BYOD): Risks to Adopters and Users

Bring your own device (BYOD) policy refers to a set of regulation broadly adopted by organizations that allows employee-owned mobile devices – like as laptops, smartphones, personal digital assistant and tablets – to the office for use and connection to the organizations IT infrastructure. BYOD offers numerous benefits ranging from plummeting organizational logistic cost, access to information at any time and boosting employee’s productivity. On the contrary, this concept presents various safety issues and challenges because of its characteristic security requirements. This study explored diverse literature databases to identify and classify BYOD policy adoption issues, possible control measures and guidelines that could hypothetically inform organizations and users that adopt and implement BYOD policy. The literature domain search yielded 110 articles, 26 of them were deemed to have met the inclusion standards. In this paper, a list of possible threats/vulnerabilities of BYOD adoption were identified. This investigation also identified and classified the impact of the threats/vulnerabilities on BYOD layered components according to security standards of “FIPS Publication 199” for classification. Finally, a checklist of measures that could be applied by organizations & users to mitigate BYOD vulnerabilities using a set layered approach of data, device, applications, and people were recommended

Alkoholi mõju viljastumise tõenäosusele menstruatsioonitsüklis

Eesti Arst 2021; 100(12):714–71

Condition-dependent ejaculate production affects male mating behavior in the common bedbug Cimex lectularius

Food availability in the environment is often low and variable, constraining organisms in their resource allocation to different life‐history traits. For example, variation in food availability is likely to induce condition‐dependent investment in reproduction. Further, diet has been shown to affect ejaculate size, composition and quality. How these effects translate into male reproductive success or change male mating behavior is still largely unknown. Here, we concentrated on the effect of meal size on ejaculate production, male reproductive success and mating behavior in the common bedbug Cimex lectularius. We analyzed the production of sperm and seminal fluid within three different feeding regimes in six different populations. Males receiving large meals produced significantly more sperm and seminal fluid than males receiving small meals or no meals at all. While such condition‐dependent ejaculate production did not affect the number of offspring produced after a single mating, food‐restricted males could perform significantly fewer matings than fully fed males. Therefore, in a multiple mating context food‐restricted males paid a fitness cost and might have to adjust their mating strategy according to the ejaculate available to them. Our results indicate that meal size has no direct effect on ejaculate quality, but food availability forces a condition‐dependent mating rate on males. Environmental variation translating into variation in male reproductive traits reveals that natural selection can interact with sexual selection and shape reproductive traits. As males can modulate their ejaculate size depending on the mating situation, future studies are needed to elucidate whether environmental variation affecting the amount of ejaculate available might induce different mating strategies

The level of Computational Thinking of secondary school among students in Al-Rusaifah District

The aim of this study was to identify The level of Computational Thinking of secondary school among students in Al-Rusaifah District. Computational Thinking Scale was designed. The sample of the study was randomly selected and consisted of (1231) secondary school among students in Al-Rusaifah districwhich counted (11.73%) of the study population. The results of the study showed that the general level of computer thinking among secondary school among students in Al-Rusaifeh was medium, and the study showed statistically significant differences due to the gender and in favor of females in the domain of analysis and abstraction and the domain of evaluation and conclusion. Statistically significant differences were found also due to the variable of owning a computer in the domain of analysis and abstraction, the domain of writing the algorithm and the scripts, and the domain of evaluation and conclusion in favor of those who have a computer. Aslo statistically significant differences were found due to the variable of owning a smartphone in the domain of analysis and abstraction and the domain of evaluation and conclusion in favor of those who have a smartphone. While there were no statistically significant differences due to the variable of the level of the school stage (first secondary, second secondary) or on the scale as a whole on any of the variables

Effect of Water Scarcity and Its Remedy at Federal Polytechnic Oko

The project focuses on the investigation and remedy on its environment and geographic dynamic of polytechnic water scarcity. The administration grandiose under taking aims to produce some litres of fresh water in the institution by building borehole field to make vision of the current administration, a reality in the form of large expensive water schemeThe rapid growth in population notwithstanding, the administration has in its policies and maneuverability on this issue of water scarcity in spite of recent climate change promised to distribute large quantity of potable water to every nook and crannies of the polytechni

Diode laser cavity-based techniques for quantification of trace species in laminar sooting flames

Cavity-enhanced absorption spectroscopy (CEAS) has been applied for the first time to in situ measurements of acetylene in sooting flames using a near-infrared diode laser. This is motivated by the role of acetylene as a major precursor in soot formation and the need for accurate measurements of acetylene to understand soot formation (with the eventual goal of reduced emissions). Vertical profiles of acetylene have been investigated in two flat flame burners with some consideration of the effect of radial profiles on the results. This thesis builds on the novel application of continuous-wave cavity ring-down spectroscopy (cw-CRDS) to in situ flame measurements of acetylene: in this work, refinements are made to the technique, which is developed to the point of generating reliable data in standard flames of interest in studies of soot formation. A key advantage of the cw-CRDS approach is that it is an absolute method, not requiring calibration. Nevertheless, the slow data acquisition led to the consideration of alternative approaches. This resulted in research on CEAS, which forms the bulk of this thesis. The advantages of the CEAS technique over cw-CRDS are highlighted, whilst noting the agreement between the two techniques. The CEAS approach allows spectra to be acquired much more rapidly and with better spectral resolution, as well as having a somewhat simpler experimental set-up. This has enabled the acquisition of a large dataset of broad scans over the full scanning range of the diode lasers employed. This thesis also goes on to explore the application of the CEAS technique to flame measurements of OH radical. The recovered profiles of acetylene concentration show good agreement for both techniques and follow the expected trend of higher acetylene concentration with increasing equivalence ratio. They also show a trend of decreasing acetylene concentration with increasing height above the burner surface. This would be consistent with the consumption of acetylene, including in reactions forming polycyclic aromatic hydrocarbons and ultimately soot. However, this is contrary to model predictions also shown in the thesis.Cavity-enhanced absorption spectroscopy (CEAS) has been applied for the first time to in situ measurements of acetylene in sooting flames using a near-infrared diode laser. This is motivated by the role of acetylene as a major precursor in soot formation and the need for accurate measurements of acetylene to understand soot formation (with the eventual goal of reduced emissions). Vertical profiles of acetylene have been investigated in two flat flame burners with some consideration of the effect of radial profiles on the results. This thesis builds on the novel application of continuous-wave cavity ring-down spectroscopy (cw-CRDS) to in situ flame measurements of acetylene: in this work, refinements are made to the technique, which is developed to the point of generating reliable data in standard flames of interest in studies of soot formation. A key advantage of the cw-CRDS approach is that it is an absolute method, not requiring calibration. Nevertheless, the slow data acquisition led to the consideration of alternative approaches. This resulted in research on CEAS, which forms the bulk of this thesis. The advantages of the CEAS technique over cw-CRDS are highlighted, whilst noting the agreement between the two techniques. The CEAS approach allows spectra to be acquired much more rapidly and with better spectral resolution, as well as having a somewhat simpler experimental set-up. This has enabled the acquisition of a large dataset of broad scans over the full scanning range of the diode lasers employed. This thesis also goes on to explore the application of the CEAS technique to flame measurements of OH radical. The recovered profiles of acetylene concentration show good agreement for both techniques and follow the expected trend of higher acetylene concentration with increasing equivalence ratio. They also show a trend of decreasing acetylene concentration with increasing height above the burner surface. This would be consistent with the consumption of acetylene, including in reactions forming polycyclic aromatic hydrocarbons and ultimately soot. However, this is contrary to model predictions also shown in the thesis

Environmental Health Effects of Exposure to Air Pollution in Industrialized Areas

Naturally, most people tend to associate air pollution problem with the coming of industrial revolution in the early 60’s. Such problems in one form or another have plagued the human race for centuries. The earliest pollutant noted in the atmosphere was probably of natural origin. Ash, fumes, smoke and forest fires, sand and dust from windstorm in arid region, dews during dry season were part of our environment long before human –induced or anthropogenic problem came on the scene. Although polluted air may not be ideal from the biological point of view, we may treat its behaviour with respect to temperature and pressure as if it were ideal. Therefore, we assume that at the same temperature and pressure, different kinds of gases have densities proportional to their molecular masses. Consequently, the concept of pollution control begins with minimization of the general waste. In Nigeria, Environmental Protection Agency was established under Decree No. 58 of 1988 to investigate and describe the environmental effect of any air pollutant emitted by stationary or mobile source, that may adversely affect human health or the environment. Example is the indiscriminate burning of solid waste at open dumps,which generates air contaminants like dust,smokes,mist and odour causing injurious to human,plant,animal or property