Papers by Keyword: UTM

Abstract: The primary objectives include investigating the mechanical properties of used construction steel, and evaluating the feasibility of reusing the old materials in green construction projects. The methodology involves gathering samples from demolition sites which are over 40 to 50 years old(1980-1985 construction sites), conducting mechanical testing (such as tensile test and bending test), and performing microstructural analysis.By promoting the utilization of used construction steel, the project seeks to reduce waste, lower material costs, and minimize the environmental impact for sustainable activities. The results we found were that the average maximum load the material can bear was 1.35KN and was bended till 6mm. The average grain size of the material was found to be 20µm. the average elongation percentage came out to be 15.27% and the elements of the material identifies that it is of grade A-36 Steel.Ultimately, this project aspires to facilitate a shift towards more eco-friendly construction practices and supporting the construction industry's transition to sustainable development.

Abstract: Self-healing composites are smart materials that can be fabricated through the dispersion of tubular nanofillers loaded with appropriate healing agents in a polymeric matrix. In this study, polysulfone (PSf) containing epoxy-loaded halloysite nanotubes (e-HNTs) were successfully fabricated via non-induced phase separation (NIPS) method at varying concentrations. Fourier Transform Spectroscopy (FTIR) analysis showed that epoxy (healing agent) and amine (hardener) were successfully loaded into the lumen of the HNT through the observed functional groups of the epoxy system along the HNT spectrum. The tensile strength of the loaded membranes compared to their unloaded counterpart slightly decreased due to the possible embrittlement of the unreacted epoxy. However, the membranes with epoxy-loaded HNTs garnered lower wettability on average due to the hydrophobic character of the epoxy system, which is a preferable trait for smart coatings. The self-healing capability of the membranes with 5% filler (loaded and unloaded) was investigated by scratch test and Scanning Electron Microscopy (SEM). The result revealed a high tendency of healing for the epoxy-infused nanocomposite film.

Abstract: Subgrade soil is very important materials to support highways. Resilient modulus (M_R) has been used for characterizing stress-strain behavior of base or subbase subjected to repeated traffic loadings. Several methods to estimate the resilient modulus were suggested in the past years. The main objective of this study was to test the resilient modulus in the laboratory. The Subgrade soil was selected in Henan province. Resilient modulus tests were conducted with UTM. Additional analysis was performed to discuss the factors of the test results.

Abstract: Buildings are accounted for around half of worldwide energy consumptions, significantly contributing to global warming and the alteration of natural ecosystems, as proved by recent reports. The role of higher education as a means of comprehensively introducing new generations of architects to the principles and practices of sustainable environmental design is becoming highly significant, although this faces a number of pedagogical and professional barriers. The aim of this study was to identify green building components used in the pedagogcal approach in environmental design studio and to present the state of sustainable education technological practice in Universiti Teknologi Malaysia (UTM). The method used was through observatory studies of environmental design studio for a whole semester to identify the pedagogies used in teaching the environmental design. Lecture inputs, experiment, site visit, field trip, crit, pin up crit and assessment were pedagogies used for the environmental studio were identified as the pedagogy used and the most observed components are active and passive while the activitiespost occupancy are seldom used.

Abstract: Making geological map Muangmai sub-district, Amphawa district, Samutsongkram Province area of Thailand is the example area. The conclusion of making map, which use the land section data together with the an aerial photography ortho- colour type and coordinate by GPS in field work and store data in digital map format, is totally 1,045 plots. These areas are summary of 3,944,000.00 m2 classified into 118,400.00 m2 for public roads, 108,800.00 m2 for public canals, 3,563,200.00 m2 for dwellings and agricultural lands and 153,600 m2 for public places, temples and schools.

Abstract: IP is the primary protocol that establishes the Internet; it is responsible for routing packets across network. IPv4 is the first version of the protocol to be widely deployed. IPv4 uses 4 bytes addresses, which limits the address space to more than 4 billion possible unique addresses. All of network devices construct on the IPv4. While the Internet widely deployed and used. IP addresses are being incrementally delegated to end users, an IPv4 address shortage has been developing. IPv4 addresses were insufficient for the Internet. IPv6 provide 2128 address and provide sufficient IPs for the Internet. But now the software and devices are only supporting IPv4. In this paper, we developed a new UTM appliance. The proposed system considers the integration of IPv4 network and IPv6 network in the Internet.

Abstract: This paper firstly analyzed the complicated educational network security conditions, especially its’ real-time protection problems; then introduced principle of UTM (United Threat Management) ，and applied the new UTM technology ---Multi-Core UTM in a BIGC’s LAN, at last made a related analysis of this project.

Abstract: The paper relates to high concentration particle doped composites based on thermosetting polymer systems in which the sequential addition of particles of certain size distribution is followed by curing and casting of the slurry to form a thermoset composite. Conventionally, at a threshold of beyond 90% of particles by weight of the polymer using triglyceride, the mechanical properties of the composite exhibit a sharp decline. The present research mitigates this behavior by incorporating a unique combination of cross-linking agents in the base polymer to impart exceptional mechanical properties to the composite. More specifically, the base polymer consists of butadiene, with triglyceride as cross-linking agent together with hydroxy-alkane as the chain extension precursors, when tune to the appropriate level of hard segment ratio in the polymer. An added advantage according to the present work resides in the analytical nature of butadiene pre-polymer as opposed to natural product; traditional composites based on natural sources are hampered by their inconsistent chemical composition and poor shelf life in the fabricated composite. The thermoset composite according the present research exhibits superior tensile strength (200-300 psi) properties using particle loading as high as 92% by weight of the fabricated composite as measured on a Tinius Olsen machine. Dynamic Mechanical Testing reveals interesting combination of storage and loss moduli in the fabricated specimens as a function of optimizing the thermal response of the viscoelastic composite to imposed vibration loading.

Abstract: In this study, the effect of combined environmental factors such as ultraviolet ray, high temperature and high moisture on mechanical and thermal analysis properties of glass fabric and phenolic composites are evaluated through a 2.5KW accelerated environmental aging tester. The environmental factors such as temperature, moisture and ultraviolet ray applied of specimens. A xenon-arc lamp is utilized for ultraviolet light and exposure time of up to 3000 hours are applied. Several types of specimens - tensile, bending, and shear specimens that are warp direction and fill direction are used to investigate the effects of environmental factors on mechanical properties of the composites. Mechanical degradations for tensile, bending and shear properties are evaluated through a Universal Testing Machine (UTM). Also, storage shear modulus, loss shear modulus and tan δ are measured as a function of exposure time through a Dynamic Mechanical Analyzer (DMA). From the experimental results, changes in material properties of glass fabric and phenolic composites are shown to be slightly degraded due to combined environmental effects.

Abstract: This study tries to obtain the spring constant of welded metal bellows through experimental and numerical method respectively. The prediction of spring constant plays a great role in the design and application of the welded metal bellows. To derive the spring constant of the bellows, we employ commercial package to build up 2 axi-symmetric FEM models by using plane 42 and shell 51 elements. In the experiment, we use UTM to measure the spring constant of the bellows. And, the predicted spring constant resulting from the analysis is compared with the experimental one to discuss the rationality of spring constant analysis. The analytical results correspond well with experimental data and hence explaining the validity of FEM model.