Simulation tool for active learning of introductory computer network subjects

Abstract— Simulation software helps a learner of networking subject to have an active learning experience. There are many simulator tools available either freely or off the shelf. Hence, simulation tools need to be carefully chosen to maximize the benefit to the learners. In order to choose simulation tools, comparison is made from a number of simulation tools that are easily available for the public. The comparison made to the tools produce a recommendation of which tool is to be chosen in different study environments. Keywords- computer networks, computer aided instruction, computer science education, electronic learning, network topology, hardware virtualization, next generation networkin

Simulation tool for active learning of introductory computer network subjects

Simulation software helps a learner of networking subject to have an active learning experience. There are many simulator tools available either freely or off the shelf. Hence, simulation tools need to be carefully chosen to maximize the benefit to the learners. In order to choose simulation tools, comparison is made from a number of simulation tools that are easily available for the public. The comparison made to the tools produce a recommendation of which tool is to be chosen in different study environments

Decision making process in keystroke dynamics

Computer system intrusion often happens nowadays. Various methods have been introduced to reduce and prevent these intrusions, however no method was 100% proven to be effective. Therefore, to improve the computer’s security, this writing will explain the application of KD in the application system. The effectiveness of KD could not guarantee one hundred percent to prevent the computer intrusion, but it can be used as a second level of security after the login page in the application system. The pattern and time taken while typing by an individual is the core for the second level of security check after the login page. This writing will elaborate and conclude past studies related to KD on the aspects of decisionmaking process. Various methods of processing KD data that have been used are listed and the results of the study are compared. The results of this writing are expected to help new researchers in the process of evaluating KD data

Laboratory-scale studies on smart gypsum composite boards incorporated with nano-encapsulated organic phase change material for thermal comfort building application

An experimental study is presented examining the preparation and characterization of a smart gypsum composite board for thermal comfort building application. Composite boards were prepared by mixing 1-30% by weight nano-encapsulated n-octadecane phase change material (PCM) with gypsum to develop gypsum-based building materials with thermal energy storage (TES) capability. The nanocapsules were prepared by encapsulating n-octadecane in nano-sized styrene-methyl-methacrylate copolymer shells using one-step mini-emulsion in situ polymerization. A thermal performance testing device was designed to evaluate the heat storage effect of the resulting gypsum composite. The results indicated that composite boards containing n-octadecane nanocapsules effectively decreased the temperature peak of the experimental test room compared with gypsum board without n-octadecane nanocapsules. This suggested that the composite boards had good thermal energy storage properties. It was also demonstrated that the composite boards containing n-octadecane nanocapsules could be used as a smart heat storage medium for thermal comfort building application. From the thermal properties point of view, incorporating 10% by weight n-octadecane nanocapsules in gypsum was more beneficial than adding more than 10% by weight

Growth and yield reposnse of rice variety MR220 to different water regimes under direct seeded conditions.

The effect of different water regime treatments on MR220 rice growth and yield response was evaluated. Three water regime treatments were used namely, continuous flooded condition, saturated and field capacity. Number of tillers increased under flooded condition compared with saturated condition for both seasons. Shoot biomass was higher under flooded condition than under field capacity and saturated condition in both the seasons. Water use efficiency was higher under field capacity condition as compared to flooded and saturated conditions for both the seasons. However, about 50% water can be saved under saturated condition and it was higher than flooded condition for main and off seasons efficiently. Number of panicle under flooded was higher than saturated and field capacity treatments in both the seasons. Grain yield was higher under flooded condition as compared to saturated and field capacity conditions in both the seasons. Flooded condition produced higher 1000 grain weight compared with any other treatments in both the seasons

Enhancing Student Mark Management Through Web Based System

In search of technological modernization, the Internet is the main medium of delivery. Education today is seen as leading to the development of the information age. Hence the approach to education is also in line with the latest technology. The use of Information and Communication Technologies (ICT) in teaching and learning has become an important method to increase the efficiency and effectiveness of the education management process. On the other hand, the ICT is also used in education to manage student information. Management of student information especially students’ marks is a burdensome task, requiring lecturers to devote more time to complete the task within the stipulated time. Besides, the lecturers who teach more than one class and have more than one marking category such as quizzes, assignments and lab exercises find this task very complicated. The use of software such as Microsoft Excel can be helpful but cannot solve all mark management requirements due to limitation of its function. Therefore, an online students’ mark management system was developed to facilitate the process of mark calculation for the lecturers in the Faculty of Information Science and Technology. By using this system, lecturers can record each student’s marks and the system will automatically compute and issue the student’s grade. In addition, analysis will be conducted in which the system will generate reports and graphs for each subject. The system was developed using the ASP.NET web application development tool, programming language C# and JavaScript as the language support, whereas the Microsoft SQL Server is used as the database tool and ASP.NET Development Server as the web server

The effect of graphite flakes (GFs) and hybrid graphene nanoplatelets (GNPs) particles to the mechanical properties of epoxy composites

This paper reports the effects of epoxy when reinforced with graphite flakes (GFs) and was compared to epoxy reinforced by hybrid reinforcements consisted of graphite flakes (GFs) and grapheme nanoplatelets (GNPs). DGEBA, the type of epoxy which has been used in this work was added with 2, 4 and 6 wt.% of reinforcement respectively, relative to the total weight of the mixture. Nanocomposites was prepared using mechanical stirrer, stirred at 2000 rpm for 30 minutes followed by curing in the oven. The flexural testing shows that the epoxy/GFs composites has higher modulus compared to epoxy/GFs+GNPs. At 4wt.% filler loading, epoxy containing GFs exhibited 132% enhancement of modulus relative to neat epoxy. At the same filler amount, epoxy containing GFs+GNPs demonstrated slightly lower magnitude than system containing GFs with only 27% increase in modulus. However, addition of higher filler loading to the epoxy resin caused the modulus to decrease in magnitude speculated due to agglomeration of particles within the host matrix. The Charpy impact testing indicated similar pattern with epoxy/GFs system exhibited higher capability in absorbing energy than epoxy/GFs+GNPs where the peak was obtained at 4wt.% filler loading. At this amount of filler, 18.36 J/m increase in energy absorbed was recorded for epoxy/GFs compared to 2.13 J/m increased for epoxy/GFs+GNPs composite. Higher amount of filler loading added into epoxy only deteriorate the impact energy absorb by the sample. The hardness test show similar pattern of result with epoxy/GFs shows higher resistance in scratching compared to epoxy/GFs+GNPs

Electrical conductivity studies in polycrystalline (CuSe)1-xSex

This studies are directed towards measuring the electrical conductivity of the (CuSe)1-xSex metal chalcogenide semi-conductor composites, with different stoichiometric compositions of Se (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8,1.0) in bulk form. The electrical conductivity measurement was carried out at room temperature, using the parallel plate technique. The (CuSe) 1-xSex composites were prepared using solid state reaction, by varying the ratio of CuSe:Se, in the reaction mixture. The electrical conductivity of (CuSe) 1-xSex was determined to be in the range of 1.17 x 10-8 to 1.02 x 10-1 S/cm. The finding indicated that the electrical conductivity value tended to decrease as the concentration of Se increased. The effect of the concentration of Se, on electrical conductivity of (CuSe) 1-xSex composites, is discussed in this paper

Growth and yield response to water availability at different growth stages of rice

Water supply is the most important factor which influences growth and yield of rice. An experiment was conducted at rain shelterhouse, Universiti Putra Malaysia to evaluate the effect of water stress at different growth stages on Malaysian commercial rice variety MR220. Treatments used in this study were: 1. flooding, 2. field capacity, 3. field capacity at panicle initiation stage, 4. field capacity at active tillering stage and 5. field capacity at first flowering stage. Number of tillers, panicles, spikelets, filled grains, length of panicles and yield were significantly reduced under filled capacity condition. Field capacity at active tillering stage also reduced number of tillers and panicles per plant, spikelets per plant, filled grains percentage, panicle length, and yield thus indicating that MR220 is sensitive to water stress especially at active tillering stage

Structural and thermal diffusivity studies of polycrystalline (CuSe)1-xSex metal chalcogenide compound

This paper reports the preparation and the characterization of the (CuSe)1−xSex metal chalcogenide semiconductor compounds with different stoichiometric compositions of Se (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) in bulk form. The (CuSe)1−xSex compounds were prepared using the solid state reaction by varying the ratio of CuSe:Se in the reaction mixture. X‐ray powder diffraction analysis is used to identify and measure the mass absorption coefficient of the (CuSe)1−xSex compounds to support the thermal diffusivity behaviour. The thermal diffusivity of the polycrystalline (CuSe)1−xSex compounds were measured and analyzed for the first time, using the photoflash technique. The thermal diffusivity values were determined to be in the range of 2.524 × 10−3 cm 2 /s to 1.125 × 10−2 cm 2 /s. It was found that the thermal diffusivity value tends to decrease as the parameter x increases. The relationship between the thermal diffusivity, mass absorption coefficient and density of the (CuSe)1−xSex are discussed in detail