Periodicals of Engineering and Natural Sciences (PEN - International University of Sarajevo)
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Deep Transfer Learning for Human Identification Based on Footprint: A Comparative Study
Full text linkIdentifying people based on their footprint has not yet gained enough attention from the researchers. Therefore, in this paper, an investigation of human identification conducted based on the footprint. Transfer Learning used as the main concept of this investigation. The aim of using Transfer Learning is to overcome the need for a large-scale dataset and achieve high accuracy with a low-scale dataset. Five well-known models used, namely, Alexnet, Vgg16, Vgg19, Googlenet, and Inception v3. Each of these models fine-tuned to fit-in the paper’s topic. A dataset of 30 individuals constructed in order to train the models. The right and left footprint of each individual captured with iPhone camera. The models trained and evaluated based on the same settings. The evaluation shows that Inception v3 model achieved the highest accuracy compared to all other four models
Topological geometry analysis for complex dynamic systems based on adaptive control method
Full text linkSeveral models had been proposed for dynamic systems, and different criteria had been analyzed for such models such as, Hamiltonian, synchronization, Lyapunov expansion, and stability. The geometry criteria play a significant part in analyzing dynamic systems and some study articles analyze the geometry of such topics. The synchronization and the complex-network control with specified topology, meanwhile, the exact topology may be unknown. In the present paper, and by making use of the adaptive control method, a proposed control method is developed to determine the actual topology. The basic idea in the proposed method is to receive evolution of the network-nodes
Geotechnical study to assess the weir stability on high erodible soils
Full text linkDwerige weir is a concrete hydraulic structure construct as flooding protect and water harvesting system for replenishment ground water in the area. The foundation comprised of highly erodible alluvial fan deposits. SEEP/W used to analysis foundation soil stability against piping erosion resulting from the water seeps. The two dimensions steady state model are selected, and saturated only materials used in the analysis. The results show that the soil need more actions to support the foundation during the weir economic life
Key criteria of sustainable hospital refurbishment
Full text linkThe primary function within a hospital is administering care to patients. Physicians and nurses are the main caregivers within hospitals and since the establishment of the modern hospital institution. They are the main stakeholders in healthcare. Many studies have been done on the aspects of sustainable environment in hospitals and evidence-based design and this study will, according to the research set. We expounded on what constitutes a sustainable hospital refurbishment from stakeholders. Outline environmental strategies that can be employed to support hospital structural environments. We developed selected sets of design guidelines that can be employed in hospital design and planning to support sustainable and refurbished environments. This research is of significance to the domain of hospital planners and designers as it extends the knowledge base that currently exists in environmental strategies for hospital design and with special emphasis to warm and humid climate by the analyses of stakeholders as discussed in this study
Kinetic profile of silver and zinc oxide nanoparticles by intraperitoneal injection in mice , a comparative study
Full text linkTo investigate the kinetic profile (Absorption , distribution , and excretion ) of intraperitoneal injected Ag NPs (24.52 nm ) and ZnO NPs (25.16 nm) in Albino mice , a single dose of the two kinds of NPs (100 mg/kg) were used for comparison .Kinetic profile in blood clarified shorter time ( T max ) were spend by ZnO NPs to be absorbed compared with longer one recorded by Ag NPs as their smaller volume of distribution (Vd) to confirm their higher concentration (C max ) with 95 µg/ml compared with Ag NPs which stands on 57.5 µg/ml , also Ag NPs needs longer time of elimination to their half values (t1/2 Elem.) in blood with lower clearance rate (CL) compared with ZnO NPs . This study discussed the distribution profile in different organs over time and pointed a considerable Ag and Zn concentrations specially in liver , spleen , intestine and kidney, also an important levels recorded in lung ,heart , testes and brain. Ag and ZnO NPs excretion manner noted a significant percentage of excretion via feces with 33 % and 83%for Ag NPs and ZnO NPs respectively compared with small percentage recorded with urine
Numerical simulation of hot forging process in production of axisymmetric automobile parts
Full text linkThe finite element method were used for the plastic metal flow prediction of ring shaped parts. Various parameters that affect the forging operation are the material characteristics like material strength, ductility, deformation rate, temperature sensitivity and frictional characteristics of the workpiece, preform design, die design and die material. Numerical simulation has been done for axisymmetric automobile parts. The procedure of numerical modeling contains all simulations phases like the movement of preform from inductor to the tool, placement and setting of preform piece inside the tool before the blow in order to get as good result as possible. These techniques are used to reduce the amount of input material for forgings, extend the lifetime of forging dies, and prevent defects in forged components
Energy dissipation in the regulators using straight wall baffles
Full text linkDissipating the high kinetic energy of an open channel flow under sluice gates can have a significant impact on eliminating scoring of the riverbed at the downstream. This paper discusses the outcome of an experimental study consisting of 28 runs, with the aim of achieving minimum hydrodynamic forces and maximum energy dissipation downstream of hydraulic structures through stilling basins with directional diverting blocks, DDBs and straight wall baffle, and SWB. Stilling basins with a distinct configuration were made for this purpose. The hydraulic parameters that were involved were evaluated and experimentally analyzed using a rectangular flume in the hydraulic laboratory of the University of Thi-Qar, Thi-Qar, Iraq. Two different kinds of DDB models were made of wood with a triangular form, and the striate line impact wall had indistinct dimensions. The study showed that the configuration characterized by two rows of DDB with SWB between them is the most effective in dispersing energy. Out of all the suggested constructions, the DDB are more effective with two or more rows, rather than the SWB, but they are subjected to forces in the flow direction
Control and Estimation of a Quadcopter Dynamical Model
Full text linkThe main motivation for this paper is to apply LQ and LQG methodologies for quadcopter control system. The developed control system is for both the rectangular position (xy) and altitude (z) as well as the orientation (attitude - angles around the axes) based on 6-Degree of Freedom (6DOF) mathematical model. 6DOF refers to the model with 3 linear and 3 angular motions. The altitude and attitude controllers are designed and the results presented in both the continuous and the discrete time cases. For the controller design, a nonlinear mathematical model was obtained first for 6DOF. The next step was to linearize the nonlinear model in hovering mode, and the final step was the reduction of the resulted linear model to be used as starting model for the controller design. The reduced linear model was tested for controllablity and observability. The control goal was to track a spatial trajectory with the quadcopter center of gravity under environment disturbances and sensor measurement errors. For this purpose, designed LQ controller was augmented by Kalman Filter state observer. The resultant controllers provide precise and robust performance for an input reference signal and for a regulation problem. After the transient response (of order of few seconds) the tracking error is acceptable which provides safe handling even under disturbances and measurement noises. The transient response can be furrther recuded by controllers fine tunning
Lean Manufacturing: Trends and Implementation Issues
Full text linkMany manufacturing cost reduction initiatives have been introduced over past three decades including lean manufacturing. Waste reduction and efficiency improvement are the main objectives of this initiative. It is developed from a set of tools and techniques and can fit nicely in cost focus or cost leadership competitive advantage strategies. But, keeping competitive advantage under the market circumstances are getting harder with growth of production quantity and product diversity. Therefore, paper\u27s focus is lean manufacturing implementation trends and issues within the various manufacturing sector. Successes and failures of implementation of lean manufacturing in some industries are discussed. It was found that lean principles are good source of competitive advantage, it is applicable for many industries and its expansion and discussion are significantly progressing. The biggest threat in implementing lean is lack of understanding the concept but those who engage consultants were more successful
Implementation Example of the Expert system for Decision Support on Android platform based on a specific Dataset
Full text linkThis paper presents the method of creating Expert system for decision support on the Android platform. The system knowledge base for the given area of expertise is generated by inductive learning methods based on examples from the WEKA data research system. The system was realized using the Expert System shell for the e2gDroid lite mobile device, based on the application area and a set of training examples, specifically based on the Covertype DataSet qualification problem