Miracle-dz/UniFAR-FTUs huggingface dataset:
Fixture Design Methodology for Sheet Metal Assembly Using Computer Simulations

Sheet metal assembly is a common manufacturing process for several products such as automobiles and airplanes. Since all manufacturing processes are affected by variation, the key characteristics or critical dimensions may not be nominal. This paper presents a new fixture design methodology for early evaluation of sheet metal assemblies. Fixture design has been extensively studied for machining processes. Unfortunately, little investigation has been done for sheet metal assembly processes considering the effect of fixture layout on the assembly dimensional variation. The new fixture design methodology is based on classifying the assemblies into three categories depending on the stiffness of the assembly components: rigid-rigid, compliant-rigid and compliant-compliant assembly. Finite Element Analysis (FEA) and design of computer experiments have been used to derive response models for sheet metal assembly applications. The response models are used to analyze the final assembly sensitivity to fixture, part and tooling variation for different assembly configurations. Based on these results several design guidelines are proposed for fixture design on sheet metal assembly.Copyright © 2003 by ASME
Hybrid differential evolution particle swarm optimisation optimised fuzzy proportional–integral derivative controller for automatic generation control of interconnected power system

A novel fuzzy proportional–integral derivative (PID) controller is proposed in this study for automatic generation control (AGC) of interconnected power systems. The optimum gains of the proposed fuzzy PID controller are optimised employing a hybrid differential evolution particle swarm optimisation (DEPSO) technique using an integral of time multiplied by absolute value of error criterion. The superiority of hybrid DEPSO algorithm over differential evolution and particle swarm optimisation (PSO) algorithm has also been demonstrated. The results are also compared with some recently published approaches such as artificial bee colony and PSO based proportional–integral/PID controllers for the same interconnected power systems. Furthermore, performance of the proposed system is analysed by varying the different parameters such as loading condition, system parameters and objective functions. It is observed that the optimum gains of the proposed fuzzy PID controller need not be reset even if the system is subjected to variation in loading condition and system parameters. Finally, the study is extended to a three area system considering generation rate constraint to demonstrate the ability of the proposed approach to cope with multiple interconnected systems. Comparison with previous AGC methods reported in the literature validates the significance of the proposed approach.
The morphology control of pentacene for write-once-read-many-times memory devices

We realized write-once-read-many-times (WORM) memory devices based on pentacene and demonstrated that the morphology control of the vacuum deposited pentacene thin film is greatly important for achieving the unique nonvolatile memory properties. The resulted memory devices show a high ON/OFF current ratio (104), long retention time (over 12 h), and good storage stability (over 240 h). The reduction of the barrier height caused by a large interface dipole and the damage of the interface dipole under a critical bias voltage have been used to explain the transition processes. The achievement of excellent WORM memory based on pentacene opens up a new application field for organic materials.
UniProtKB

T he UniProt Knowledgebase (UniProtKB), a product of the UniProt consortium, provides a central database of protein sequences with accurate, consistent, rich sequence and functional annotation. T he UniProt Knowledgebase consists of two sections: Swiss-Prot a section containing manually-annotated records with information extracted from literature and curator-evaluated computational analysis, and T rEMBL a section with computationally analyzed records that await full manual annotation. Qeios · Definition, February 7, 2020
Channel-estimation-based adaptive DFE for fading multipath radio channels

The performance of an adaptive decision feedback equaliser (DFE) over an HF channel when its taps are derived from an estimate of the sampled channel impulse response is examined. The conventional approach to adaptation is to adjust the equaliser taps directly to minimise a least squares error cost function. It is shown that the channel estimate approach not only yields superior performance, but also involves fewer computations than the conventional square-root-Kalman approach. The problem of channel estimation is mathematically analysed for both the steepest descent and recursive least squares algorithms, and theoretical results are compared with simulation. It is also shown how simple theoretical predictions of the performance of the DFE can be made when using this alternative method of implementation.
Stripline-Like Transmission Lines for Microwave Integrated Circuits

Elements of Microwave Integrated Circuits. Planar Transmission Lines-- Methods of Analysis. Analysis of Striplines and Stripline-Like Transmission Lines. Analysis of Coupled Striplines and Stripline-Like Transmission Lines. Design Data on Single Strip Conductor Stripline-Like Transmission Lines--Characteristic Impedance and Effective Dielectric Constant. Design Data on Edge-Coupled Stripline-Like Transmission Lines--Characteristic Impedances and Effective Dielectric Constants. Design Data on Broadside-Coupled Stripline-Like Transmission Lines--Characteristic Impedances and Effective Dielectric Constants. Design Data on Broadside-Edge Coupled Stripline-Like Transmission Lines and Some Special Structures. Hybrid-Mode Analysis and Dispersion Data on Stripline-Like Transmission Lines. Discontinuities in Stripline-Like Structures. Losses in Stripline-Like Transmission Lines. Circuit Design and Applications. References. Index.
Modeling Assessment of Potential Fates and Exposure for Orimulsion and Heavy Fuel Oil Spills

ABSTRACT Power Plants worldwide are considering conversion from heavy fuel oil to Orimulsion. As a demonstration of screening analysis, the consequences of hypothetical spill scenarios of these two fuels were evaluated and compared using spill modeling. The Spill Impact Model Application SIMAP was run in stochastic mode to determine probabilities and degrees of exposure. In stochastic mode, a large number of simulations are run for a given spill site and fuel release scenario, varying the spill date and time, and thus the environmental conditions, for each run. Outputs of the model were used to (1) generate probabilities that water surface, water column, and shoreline areas would be affected by a release from the given site; (2) determine the highest exposure concentration in time and for any possible environmental condition; and (3) evaluate cumulative exposure at each location around the spill site. The stochastic modeling approach provides an objective, quantitative method for comparing the consequence.
Padé Approximants, Their Properties, and Applications to Hydrodynamic Problems

This paper is devoted to an overview of the basic properties of the Padé transformation and its generalizations. The merits and limitations of the described approaches are discussed. Particular attention is paid to the application of Padé approximants in the mechanics of liquids and gases. One of the disadvantages of asymptotic methods is that the standard ansatz in the form of a power series in some parameter usually does not reflect the symmetry of the original problem. The search for asymptotic ansatzes that adequately take into account this symmetry has become one of the most important problems of asymptotic analysis. The most developed technique from this point of view is the Padé approximation.
CENTRIFUGE MODEL TEST AND NUMERICAL ANALYSIS OF EMBANKMENT WIDENING ON SOFT GROUND

Widening of expressways on soft ground induces many embankment and pavement distresses. In this study, model tests and numerical analyses (such as finite element analysis) have been carried out for a widening project. Comparison is made between test data and calculated results. The development of settlement, horizontal displacement and pore water pressure in widening are investigated. At the same time, in the centrifuge model test the limit status and failure mechanism of widening is discussed and analyzed.
Interface between Trapped-Ion Qubits and Traveling Photons with Close-to-Optimal Efficiency

Experimental results are presented on the efficiency limits for a quantum interface between a matterbased qubit and a photonic qubit. Using a trapped ion in an optical cavity, we obtain a single ion-entangled photon at the cavity output with a probability of 0.69(3). The performance of our system is shown to saturate the upper limit to photon-collection probability from a quantum emitter in a cavity, set by the emitter’s electronic structure and by the cavity parameters. The probability for generating and detecting the ion-entangled fiber-coupled photon is 0.462(3), a fivefold increase over the previous best performance. Finally, the generation and detection of up to 15 sequential polarized photons demonstrates the ability of a trapped ion to serve as a multiphoton source. The comparison between measured probabilities and predicted bounds is relevant for quantum emitters beyond trapped ions, in particular, for the design of future systems optimizing photon collection from, and absorption in, quantum matter.
Analysis of Packet Transmission Delay in Vehicular DC-ARQ

Considering the DC-ARQ mechanism, this paper discussed the information transmission cycle of between vehicle nodes in the vehicle and road environment, and obtained the analytical expression of delay performance for GBN-ARQ retransmission protocol. The results obtained in the paper provide a way to improve vehicle ad-hoc network transmission capacity.
A new analytical model for high-velocity impact of thick composites

Abstract A new analytical impact/penetration model has been developed for high-velocity impact of thick composite targets using a spring-mass equivalent energy dissipating finite element/finite difference scheme. The initial basic model includes energy dissipating mechanisms such as punching shear and fiber breakage. The impact/penetration law, which is based on a linear distribution of punching shear force, is represented by a stiffness parameter. The equivalent variable mass of the composite target is built into the model by considering two-dimensional shear wave propagation, and its effective stiffness was initially represented by a nonlinear spring stiffness that is obtained from analyzing an infinite hollow cylinder subjected to internal in-plane shear. The two stiffness parameters are characterized by analyzing the forces between the impactor and the composite target at increasing depths of penetration through a series of quasi-static finite element analyses. Results are used to provide a more accurate prediction if the impactor would perforate or stop, and to obtain an estimate of its exit velocity or the depth of penetration for both blunt-ended and sharp-ended impactors penetrating a thick composite target at high speed. Analyses were performed to demonstrate different high-velocity impact scenarios.
Availability And Utilization Of Information And Communication Technology In The Adamawa State Civil Service

This study surveyed the availability and utilization of Information and Communication Technology (ICT) in the Adamawa State Civil Service. Five hundred and thirty (530) civil servants were involved in the study. They included lower, middle and upper level civil servants. Major results of the study are as follows: Personal computers are the major ICT components available in the civil service, other components of ICT such as Audio-Visual materials, CD-ROM, video recorders and players, projectors, cameras, camcorders are not available in most ministries. Hence, majority of the civil servants consider personal computers as ICT in its totality. The internet and other ICT components are not widely utilized in most ministries. Very few libraries and information centers are available in ministries. These libraries do not have other ICT components except personal computers that are not connected to the internet. Recommendations have been proffered.
A computational mechatronics approach for the analysis, synthesis and design of a simple active biped robot: Theory and experiments

Biped walking is a quite complex process that has been mastered only by human beings. Transferring this skill to a robot requires implementing advanced techniques in every aspect. To this end, a computational mechatronics platform was integrated to run the scheme for the analysis, synthesis and design to achieve planar biped walking. The result is an advanced computational tool that integrates advanced modeling and control as well as path planning techniques along with hardware-in-the-loop for perhaps the simplest biped robot. An experimental underactuated three-degree-of-freedom two active and one passive active biped robot yields encouraging results; that is, achieving biped walking with this simple device requires adding a telescopic support leg. Considering a more complete dynamic model to take into account frictional and contact forces.
Real-parameter quantum evolutionary algorithm for economic load dispatch

A novel real-parameter optimisation algorithm called the 'real-parameter quantum evolutionary algorithm' is presented. The algorithm pieces together the ideas from evolutionary algorithms (EA) and quantum computing to provide a robust optimisation technique that can be utilised to optimise highly constrained non-linear real-parameter functions. Quantum bits have immense representational power due to their being in superposition of all the basic states at the same time. New quantum operators designed in this work enable the search to effectively handle the twin objectives of exploitation and exploration. This enables the search to be pursued with small population sizes, thereby speeding up the search process and also ensuring that there is no problem of premature convergence that often plagues pure EA implementations. The power of the proposed algorithm is demonstrated by solving the economic load dispatch (ELD) in power systems. ELD is to find the optimal loadings on the generators so as to achieve minimum operating cost while satisfying various system and unit-level constraints. The proposed method has been applied to standard load dispatch problems reported in the literature including the IEEE 30 bus system, IEEE 57 bus system and a 110-generator problem, and its performance has been compared with the results obtained by other methods. The results adequately demonstrate the enhanced search power of the proposed algorithm in terms of obtaining better solutions and provide motivation for its application to other real-parameter optimisation problems in power systems.
The impact of market focus on operations practices

A key element of successful organisations is the alignment of their strategy and tactics. This study explores the relationship between a firm's competitive strategy and its operations practices in the context of a developing economy. Two competitive strategies are examined; a niche market strategy characterised by targeting specific market segments, and a broad market strategy characterised by serving a wide range of market segments. Three sets of operations practices consistent with the adoption of lean manufacturing, Total Quality Management, and relationship development in a supply chain context, are explored. Using survey data from senior managers in Thailand, results show that for firms adopting a niche market focus, competitive strategy directly influences process management and relationship development, which in turn affect workforce commitment. Only workforce commitment has a direct effect on operational performance. In contrast, for firms adopting a broad market focus, competitive strategy directly influences workforce commitment, which in turn affects process management and relationship development practices. It is the latter practices that directly influence operational performance.
Modularity Based Community Detection in Dynamic Social Networks

Regular change is one of the features of network observed while analyzing dynamic social networks. But it is not easy to find community detection on real world dynamic social network. Dynamic social network generators are used insertion/deletion for node/edge and merge/split of community. In this paper, a method for community detection in a dynamic social network is proposed. Initially we take a static network, by moving a clique from one community to another community and flipping edge method in static network. By repeating this step, we get a dynamic network with improved modularity at every time step. So this method is used for community detection in dynamic network. An experiment is conducted to study changes in various network parameters like number of node, clustering coefficient, average distance between nodes etc.
BUSINESS POTENTIAL FOR AUGMENTED REALITY APPLICATIONS : Attitudes and concerns inside the focus groups consisting of JAMK students

This paper studies the expectations, beliefs and concerns that students of JAMK University of Applied Sciences have towards augmented reality. The goal is to map out potential future augmented reality applications and to understand what kind of concerns do the university students have about the technology and its applications. The theoretical framework consists of thorough information about augmented reality; its history, the current situation and the future of the technology. In addition, specific traits of high tech markets were studied in order to understand in what kind of an environment do these types of applications exist. Also focus group method is thoroughly explained for the reader. The research is based on qualitative focus group research. Four focus group interviews were conducted in April 2013 with 22 people. Participants were Finnish and international students from JAMK. Participants found augmented reality applications that offer additional information, guide the user or help them make for example purchasing decisions valuable. Use of augmented reality in educational and business areas was seen as a potential direction. Applications that were designed for fun purposes did not interest the participants, the lifespan of such applications was a major concern. Future research could be conducted with people of different age groups in order to understand better how they perceive augmented reality and how they see the future of it.
Novel MEMS pressure and temperature sensors fabricated on optical fibers

We present the fabrication and initial testing of novel optically interrogated pressure and temperature sensors fabricated directly on optical fibers using microelectromechanical systems (MEMS) technology. A new micromachining process for use on a flat fiber end face that includes photolithographic patterning, wet etching of a cavity and anodic bonding of a silicon diaphragm is utilized. Two prototype pressure sensors, fabricated on 400 μm diameter multimode fibers, have been tested displaying an approximately linear response to static pressure (14–80 psi). A prototype temperature sensor, fabricated by anodically bonding an ultra-thin crystalline silicon onto a fiber end face, has been tested in the range 25–300 °C. A minimum detectable temperature variation of 6 °C is observed. Since these sensors are significantly miniaturized, they will find application in situations where small size is advantageous and where dense arrays may be useful.
Trajectory Control of Museum Commentary Robot Based on Machine Vision

The design aim to make the museum robot move according to desired trajectory. Having a commentary robot in museum can not only arouse visitor’s curiosity, but also save human resource. Furthermore, this robot can change and upgrade its software system according to museum action situation to accomplish different trajectory in different space. The machine vision tracked method is applied to museum robot, which mainly use camera to seek the marked object in proper order and accomplish designed trajectory movement.
The Hardware Design of Control System of Coal Mine Detection Robot AC Servo Drive

Currently, more than 100 million anti- personnel mines are under the ground all over the world. These mines not only disturb the economic development of mine- buried nations, but also injure or kill more than 2000 people a month. As a result, the removal of landmines has become a global emergency. China as one of the largest coal production and consumption country around the world, it is also of the accident occurred frequently country such as fire damp explosion, water burst, catch on fire during the exploitation of coal mine. The research of detecting by coal mine shaft underground explorative robot make the coal mine rescue works implements smoothly, to reduce casualties caused by mine disaster, it will be substituted for or partial substituted for emergency workers to enter the coal mine rescue. Main effect of coal mine detection robot is taking place of human to go into the post- disaster coal mine for detecting information of the environment and sending the information to the command center. Therefore, it is of great significance to research on coal mine detection robot for reducing casualties and unfolding of the saving work smoothly. Researches on the hardware design of control system of servo drive are not only the key technology of the issue, but also the guarantee on completing the detection task of coal mine detection robot. Main work of path planning for coal detection robot are not only to find a safe and collision- free path from the starting point to end point in the environment of post- disaster coal mine with the uncertain obstacles in it but also to make the path shorter and energy consumed less. The implementation of control system of coal mine detection robot AC servo drive can achieve many tasks, such as motion control, environmental information acquisition, communication with the remote control system and executing complex control algorithms.