People use stories to construct meaning and tocommunicate. The skills of storytelling are crucial for engagingincasual conversation and successful communication ingeneral. In the 21st century children are faced with variousmodalities of representation, which require new ways ofreading, listening, interpreting and thinking. Children areengaged in those different modes of interaction and the nonlinear and multimedia world. Along with the advance oftechnology, the classic storytelling has also seen somedevelopments in EFL classrooms around the world. In amodern classroom it is necessary to address multipleliteracies and digital storytelling combines the ancient art oftelling stories with a variety of digital tools and multimedia.Computer-aided storytelling has become an important tool ofinstruction for students of English as a foreign language, aswell as their educators. This article aims to present anoverview of the practical uses of computer-aided storytelling inEnglish language classrooms. Nevertheless, theimplementation of the aforementioned instructional tools inEFL classrooms entails different challenges for both studentsand educators. The paper includes the discussion of the mostimportant benefits and challenges of computer-aidedstorytelling.

The aim of this paper is to investigate the power factor correction (PFC) of Boost Converter under an average current-mode control. Boost converter topology is used to accomplish this active power-factor correction in many discontinues/ continuous modes. The boost converter is used usually it is easy to implement and works well. In this paper comparative evaluation of different techniques for harmonic reduction in input current of ac-dc converter is presented. Converters employing as side switching and boost converter is simulated in PSIM Software. Average current tracks the current program with a high degree of accuracy. This is especially important in high power factor pre-regulators, enabling less than 5% harmonic distortion to be achieved with a relatively small inductor. In fact, average current mode control function works well even when the mode boundary is crossed into the discontinuous mode at low current levels. The outer voltage control loop is oblivious to this mode change. Firstly I have simulated only single bridge rectifier without any use of converter to find the THD (Total Harmonic Distortion) at input and then applied open loop converter with single bridge rectifier to see how it affects the input THD and at last applied a converter with current control and voltage control loops so that to improve the input THD. A step change at Load end is applied and the result is displayed so that to show the response of the system to be stable. All the results are shown below in the paper.

Background: Chest anterior-posterior (AP) x-ray imaging is used to diagnose and follow up conditions of the heart and lungs in neonates. As neonates are more sensitive to radiation and have longer life expectancies ionizing radiation may increase the risk of cancer induction in this patient population. By using a computed radiography (CR) system acceptable images, requiring lower doses of radiation, may be produced digitally. However, radiation dose reduction is often associated with reduced image quality. Objectives: To derive exposure protocols that decrease the entrance surface dose (ESD) and relative cancer induction risk, while maintaining acceptable visual image quality. Methods and materials: A phantom was designed and used to experimentally optimise x-ray imaging protocols by varying exposure technique factors, such astube voltage and current, exposure time and filtration. Images were ranked according to measured ESDs, visual image quality and relative cancer induction risks. Results: Comparison of derived protocols to a standard neonatal chest exposure protocol revealed that the ESD was reduced approximately by 63% while image quality was improved by about 27%. Relative cancer induction risk analysis showed that, despite reduced ESDs, the risk could be greater than the standard exposure risk. Conclusion: Six exposure options that answer the aim were derived. The most optimal combination of decrease in the ESD and relative cancer induction risk with maintenance of visual image quality is a processed image at 57 kV, 2 mAs, 100 cm focus-to-film distance (FFD), fine focus, tight collimation and 0.1 mm Cu (copper) and 1 mm Al (aluminium) additional filtration.

Morphometric studies aimed at identifying some existing variations among different samples of Callosobruchus subinnotatus (Pic) collected from three locations each of five Northwestern States(Kaduna, Zamfara, Kebbi, Kano and Katsina) inNigeria was evaluated. Thirteen diagnostic features were used in which measurements were carried out on ten characters using handheld digitalized Miscope microscope (40-140x magnification) while three ratios were used as explanatory variables. Data obtained were analyzed using the parametric statistical tools of mean, standard deviation and standard error. The distribution and relationships among samples studied were expressed using two step cluster analysis, results of which were drawn into cluster distributions, centroids of means of morphoclusters andthe simultaneous confidence intervals (95%) used to determining the level of significance among measured variables of the samples. The result gave two morphoclusters revealing the existence of two possible races of C. subinnotatus in Northwestern Nigeria. Race 2 constituted the highest percentage distribution across the States with 53.3% against race 1 with 46.7%.Race 2 were relatively bigger in size than race 1.

The experience of designing strategic laser systems in the previous years and a strong belief in the attainability of the goal - the development of high-power laser weapons - help to significantly accelerate the pace of work in the field of new technologies. World press has recently published the articles where it was suggested that the anti-missile airborne laser project suffers cost overruns and delays and may fall victim to budget cuts. Just after that mass media immediately reported that the Pentagon refuses to develop combat lasers. As a result, there has appeared an epic set of myths about combat lasers. The task of this paper is to consider the most ridiculous statements and to reject them by sufficient analysis. An additional goal is to focus the interests of laser physics community to the mono-module disk laser geometry, which is possible now for implementation.

Architectural new tendencies along with current market demands are taking engineering design towards the use of flooring systems which can span great distances with a minimum number of columns allowing, thus, more architectural flexibility. This design philosophy has conducted to ever more slender structural elements, with ever lower natural frequencies that are, therefore, closer to the frequency bands of dynamic excitations associated to human activities, such as walking. Within this context, this paper studies the behaviour of the following flooring systems: (a) reinforced concrete slabs supported by steel beams, and (b) steel floor plates supported by steel beams. The evaluation of the natural frequencies of the structure and its responses (floor displacements and accelerations) to the walking activity were analyzed by the simplified analytical method of AISC 360-10 code. The flooring systems were modeled using the finite element software ANSYS 14.0â„¢ and the numerical results for natural frequencies and floor accelerations were compared with those obtained by the simplified procedure of the AISC 360-10 code. This way, it was possible to draw conclusions about the dynamic behaviour of the analyzed flooring systems.

The need for lie detection is to resolve disputes that arise over inheritance, forgery, impersonation as well as in forensic science which deals with application of science to law aiding to deliver justice by eliciting truth, scientific evaluation of physical evidence usually encountered in many civil, criminal regulatory and statutory cases. All the methods for lie detection including the most popular polygraph testing depend on the measurement of variation of physiological conditions like heart beat rate, respiratory rate (breath rate), etc. by establishing physical contact of some medical device with the person’s body and thus are invasive and obtrusive. But these physiological conditions vary due to the effect on the autonomic nervous system (ANS) for any reason irrespective of whether the person tells a lie or the person is innocent but feels nervous for being under test. This leads to an ambiguous and/or inaccurate decision about the person telling lies. A radar based lie detector proposed recently can be a remote, non-contact, non-invasive and unobtrusive method. This review paper summarizes the common signs of deceptive behavior, major non-radar based methods used earlier and finally, the radar based technique for lie detection that has emerged as a technical breakthrough in lie detection.

A field experiment was conducted during the 2012 and 2013 rainy season at the Kwara State University Teaching and Research Farm located in Malete. The aim was to determine the effect of different weed control methods on Weed infestation, growth and yield of soybeans (variety TGX 1448 – 2E). The experiment consisted of 8 treatments, namely, the application of metolachor at 1.5, 2.0 nd 2.5 kg a.i./ ha, pendimethalin at 1.5, 2.0 and 2.5 kg a.i./ha, a tank mixture of metolachlor + diuron at 1.5 + 0.5, 2.0 + 1.0 and 2.5 + 1.5 kg a.i./ha, pendimethalin + diuron at 1.5 + 0.5, 2.0 + 1.0 and 2.5 + 1.5 kg a.i./ha, metolachor at 2.0 kg a.i. /ha plus I supplementary hoe weeding (SHW) at 6 WAS, pendimethalin at 2.0 kg a.i. /ha plus supplimentary hoe weeding (SHW) at 6WAS, metolachlor + diuron at 1.0 +0.5 kg a.i. /ha plus ISHW, pendimethalin + diuron at 1.5 +0.5 plus ISHW at 6WAS, weeding at 3 and 6 WAS and a weedy check. Results show that all the herbicide treatments significantly reduced weed infestation compared with the weedy check. However, metolachlor + diuron integrated with ISHW was more effective than the application of only herbicides in the control of weeds throughout the crop life. This weed control method also resulted in significantly better growth and higher yield. Therefore for better growth and higher yields, metolachlor + diuron integrated with ISHW at 6 WAS is recommend to formers in the Southern Guinea Savanna of Nigeria.

This study provides a qualitative and quantitative assessment of Chamelea gallina stock in the italian region Molise (Adriatic Sea) in 2003-2012 years. We investigated abundance, biomass and size distr ibution of Clams populations. Reported results showed biomass and abundance fluctuations in several years and at different investigated areas. The areas with greater fishable biomass are those near Trigno and Rio Vivo rivers, especially in 2010- 2012 years. In Both areas, the Clams biomass and density amounts show strong seasonal and annual variations with no detectable seasonal equal trends in several years. In this study, concentrations of sub-commercial size individuals suggesting crowded conditions were never detected. Data analysis also evidence that fishery activity is based almost exclusively on specimens that have just reached minimum commercial size (25-35 mm). However, in both areas, there was a progressive increase in commercial Organisms size; so it is supposable, despite recruitment low rate, a positive trend for population growth.

The application of implants for dental and orthopedic surgery has increased rapidly within the past few decades. In craniomaxillofacial surgery, different implant systems have been applied, for example, for dental and bone replacement or osteosynthesis plates and screws. These implants may be made of pure titanium or a titanium alloy, usually titaniumaluminum- vanadium (Ti-6Al-4V). The surface can he turned or Machined or a coating may cover the metal base. The reason for treating the implant surface is to obtain maximum boneimplant contact and bone-implant stability and to shorten the healing time for earlier loading. The crucial aspect of pure titanium implants is the development of titanium oxide on the surface. This oxide and other known coatings for implant material do not have high wear resistance. This article thus aims to review Implant Surface Micro-design its rationale, various surface’s physical and chemical properties, different types of implant surface treatments, optimum roughness of oxidized implants and controversies associated with various implant topographies. The recent advances like nanotechnology are also included.