Miracle-dz/UniFAR-FTUs huggingface dataset:
Inkjet printing in the manufacture of electronics, photonics, and displays

Ink-jet printing technologies are now being developed and used across a wide spectrum of optoelectronic and microelectronic manufacturing applications, because they provide opportunities both for significant cost reductions in existing components and for new component and device configurations. Examples of cost reductions in existing component configurations include printing of optical epoxies to fabricate precision microlens arrays for micro-mirror-based MEMS optical switches and fluxless printing of solder bumps for flip-chip BGA, μBGA and CSP (chin-scale package) manufacture. The most widely recognized, relatively new application of ink-jet printing has arisen in the manufacturing of PLED (Polymer-LED) displays. Potential uses of these technologies for creating new device and package configurations that provide both higher performance and lower cost include microlens printing directly onto VCSELs or the tips of optical fibers for increasing the efficiency of coupling and solder ball printing for making right-angle electrical connections, in order to enable further miniaturization of optoelectronic packages. Example ofnew device configurations which may be fabricated using these capabilities include chip-level optical switches, transceivers, transmitters and receivers.
Multi-operation cryptographic engine: VLSI design and implementation

The environment of smart card lacks of system resources but the commercial and economic transactions via smart cards demand the use of certificated and secure cryptographic methods. In this paper a cryptographic approach in hardware for smart cards is proposed. The proposed system supports two basic operations of cryptography, authentication and encryption. The basic component of system is the one round of DES algorithm which supports the DES, Triple DES and the ANSI X9.17 standards. The proposed system is efficient in terms of area resources and techniques for low power consumption have applied. Due to the fact that the system is for smart card applications the overall throughput outperforms the typical smart card throughput standards.
Transportable optical frequency comb based on a mode-locked fibre laser

A new transportable frequency comb has been developed at the National Physical Laboratory. The transportable frequency comb is based around a MenloSystems FC1500 optical frequency synthesizer, which is capable of measuring any frequency between 500 and 2100 nm. Measurements made by the comb while off-sites are referenced to the SI second via a global positioning system (GPS)-disciplined Rapco 2804AR rubidium oscillator. All components of the system (except for the GPS antenna) have been integrated into a single mobile unit. Measurements of high-stability narrow-band optical sources using this system, with either the GPS-disciplined oscillator or a hydrogen maser as a reference, are described. Some of these measurements were made simultaneously with a hydrogen-maser-referenced Ti:sapphire-based comb. It was found that the GPS-referenced transportable comb has a fractional inaccuracy of better than 4 10 -12 (averaged over several hours) when compared with the maser-referenced Ti:sapphire comb, and a fractional frequency instability of 1times10 -12 for an averaging time of 10 s. It was also demonstrated that continuous frequency measurements are possible with this system over a period of 60 h or more.
Network-assisted diversity for random-access wireless sensor networks under the use of the generalized approach to signal processing

A novel viewpoint based on the generalized approach to signal processing in the presence of noise and devoted to the collision resolution problem is introduced in this paper for wireless slotted random access sensor networks. Signal separation principles borrowed from signal processing problems are used. The received collided packets are not discarded in this approach but are exploited to extract each individual sensor node packet information. In particular, if k sensor nodes collide in a given time slot, they repeat their transmission for a total of k times so that k copies of the collided packets are received. Then the receiver has to resolve a k x k source-mixing problem and separate each individual sensor node. The generalized receiver does not introduce throughput penalties since it requires only k slots to transmit k colliding packets. In the course of analysis, we consider four channels models: ideal additive white Gaussian noise channel, in which the i-th sensor node’s gain is a deterministic but unknown constant; non-fading channel with power control but arbitrary phase, in which the amplitude of the i-th sensor node’s gain is constant (may be unknown), whereas the phase is random and uniformly distributed within the limits of the interval [0,2π]; Rayleigh fading channel, in which the phase is uniformly distributed within the limits of the interval [0,2π], whereas the amplitude is distributed with the parameter, σA and the amplitude and phase are independent; Rician fading channel, in which the phase is uniformly distributed within the limits of the interval [0,2π], whereas the amplitude is Rician distributed with the parameter A and σA and the amplitude and phase are independent. Performance issues that are related to the implementation of the collision detection algorithm based on the generalized approach to signal processing in the presence of noise demonstrate a great superiority in comparison with well-known methods. The protocol’s parameters are optimized to maximize the system throughput. Under the use of the generalized approach to signal processing in the presence of noise, the system throughput is higher in comparison with modern methods and algorithms.
Optimization of stiffened plates for steel bridges based on Eurocode 3 Part 1‐5 using genetic algorithms

Bridges are an important part of any country’s infrastructure. Welded stiffened plates are widely used as box girders for bridges. This article presents a design optimization problem for a single steel box with stiffeners on webs. The design is intended to be formulated based only on the current version of Eurocode 3 Part 1‐5 ”Plated structural elements”. Eurocode 3 will definitely be introduced in all the Member States of the European Union. This optimization resource represents an engineering compromise, not only for society, but also for avoiding negative impacts on the environment.
Comparative Study on Ultimate Pullout Resistance Test and Theoretical Derivation of Flexible Pressurized Anchor with Numerical Simulation Result

The study on anchorage characteristics of flexible pressurized anchor should be along with theoretical analysis, numerical simulation and test study. Through comparing three calculation results, it is concluded that the theoretical analysis and numerical simulation can authenticate the correctness of calculation process each other; After considering the situation that friction coefficient changed with different contact pressure stress, the deviation of calculation of theory derivation and numerical simulation with experimental results significantly reduced; Anchor was simplified for anisotropic composite material body, which should be able to better reduce deviation among test, theoretical derivation and numerical simulation calculation.
Sound Texture Synthesis Using an Overlap–Add/Granular Synthesis Approach

Texture synthesis, commonly used for graphics, can be applied to sound textures. A real-time capable overlap-add method for sound texture synthesis is described. The method performs significantly better than previous, more complex methods for many types of sounds. It is especially well suited to sounds with a random character. The results suggest that better textures can be achieved using longer scales of granularity than used previously.
Filtering and calibration of laser-scanner measurements

The paper introduces in airborne laser scanner architecture and its data postprocessing. One main problem is the definition of a contiguously measured digital terrain model (DTM) by filtering neighboring strips and their attachment to each other. These problems are solved by spline approximations and datum transforms. The spline approximation starts with a bicubic polynomial which can be reparameterized in terms of its function values and the first derivatives as new unknown parameters. Filtering is carried out in a two dimensional rectangle bordered by the nodes of the spline. The next step of the data postprocessing is the datum transform. Using a similarity transform the seven datum parameters have to be defined by a data snooping procedure with non-parametric hypothesis tests. The reason for using non- standard test statistics is the systematic effects produced by the sensor system itself are man- made and natural 3-D phenomena cannot be eliminated a priori perfectly. Therefore, the datum transform should give the hints which observations are blunders and which are not.
The use of upstream and downstream information in scheduling semiconductor batch operations

This paper presents a control strategy that exploits and uses both upstream and downstream information on the current and expected states of a semiconductor manufacturing facility (FAB) to make intelligent batch size decisions. Through simulation, this strategy is compared with current methods that consider only upstream information, as well as with a general threshold policy. The results confirm that significant improvements in cycle time can be realized by exploiting upstream information. Some additional improvement can be gained at low to moderate traffic intensities by looking downstream. However, as traffic intensity increases, use of downstream information can actually lead to longer delays, indicating that the scheduling of the batch machine may be more important than the scheduling of the serial machine in congested systems.
Flying qualities - An integral part of a stability augmentation system

During the conception, development, and flight testing of a stability augmentation system designed to improve the structural response characteristics of the B-52, it was necessary to provide flying qualities criteria and to conduct piloted simulator studies to assure that the B-52 flying qualities were improved or maintained. The fixed-base simulator studies utilized a point light projection display system and a B-52 cockpit display and included the effect of random turbulence. The results of the studies conducted for the lateral-directional axis are presented. In the piloted simulation study the Dutch roll frequency and damping were varied while other pertinent lateral-directional parameters were maintained constant. It was found that the Dutch roll damping required to provide satisfactory flying qualities in turbulence was significantly greater than the damping required in essentially calm air. Improvements in the handling qualities as verified by flight test are also presented.
The design of the fly adhesive pad: distal tenent setae are adapted to the delivery of an adhesive secretion

Flies (Brachycera) have adhesive pads called pulvilli at the terminal tarsomere. The pulvilli are covered by tenent setae, sometimes termed tenent hairs, which serve to increase the actual area of attachment to the surface. By using transmission and scanning electron microscopy it is shown that proximal and distal tenent setae have different ultrastructures. The design of distal adhesive setae is adapted for the release of adhesive substances close to the area of contact. It is concluded that secretion injection is precisely targeted under the distal tip of a single seta.
A low-voltage high-speed electronic switch based on piezoelectric transduction

We propose a novel digital switch, the piezoelectronic transistor or PET. Based on properties of known materials, we predict that a nanometer-scale PET can operate at low voltages and relatively high speeds, exceeding the capabilities of any conventional field effect transistor (FET). Depending on the degree to which these attributes can be simultaneously achieved, the device has a broad array of potential applications in digital logic. The PET is a 3-terminal switch in which a gate voltage is applied to a piezoelectric (PE), resulting in expansion compressing a piezoresistive (PR) material comprising the channel, which then undergoes a continuous, reversible insulator-metal transition. The channel becomes conducting in response to the gate voltage. A high piezoelectric coefficient PE, e.g., a relaxor piezoelectric, leads to low voltage operation. Suitable channel materials manifesting a pressure-induced metal-insulator transition can be found amongst rare earth chalcogenides, transition metal oxides, and among others. Mechanical requirements include a high PE/PR area ratio to step up pressure, a rigid surround material to constrain the PE and PR external boundaries normal to the strain axis, and a void space to enable free motion of the component side walls. Using static mechanical modeling and dynamic electro-acoustic simulations, we optimize device structure and materials and predict performance.
An Enriched Constitutive Model for Fracture Propagation Analysis Using the Material Point Method

We develop a novel constitutive modeling approach for the analysis of fracture propagation in quasi-brittle materials using the Material Point Method. The kinematics of constitutive models is enriched with an additional mode of localized deformation to take into account the strain discontinuity once cracking has occurred. The crack details therefore can be stored at material point level and there is no need to enrich the kinematics of finite elements to capture the localization caused by fracturing processes. This enhancement also removes the drawback of classical smeared crack approach in producing unphysical snapping back constitutive responses when the spatial resolution is not fine enough. All these facilitate the implementation of the new approach in the Material Point Method for analysis of large scale problems. Numerical examples of fracture propagation are used to demonstrate the effectiveness and potentials of the new approach.
The rise and fall of new technologies: Maglev as technological substitution?

Since the late 1970s, rail transport has made a comeback with the introduction of highspeed trains. Before then, trains had a speed of only 100–130 km/h. Today trains can achieve regularly three times those speeds and national railway organisations feel the pressure for reorganisation to improve the quality of services. Japan and Europe are the places where the high‐speed rail revolution is taking place. But we also see a tendency to base these high speed line systems on national rail standards. At the same time we observe new developments, which are likely to lead to a technological breakthrough, comparable with the development of the steamship, conventional train or automobile. This new system, called Maglev, is based on the principle of magnetic levitation. More than ever before, the chances of success for this new technology depend on the outcome of competition with improved conventional rail technologies. In this paper the present development of high speed rail systems in Europe, Japan and the United.
The role of coordinate-based decision-making in the evaluation of sustainable built environments

In an era when sustainability and climate change mitigation are paramount, it is important that built environment professionals make robust and transparent decisions regarding future development. A new approach is outlined and tested for assessing sustainability for built infrastructure using a quadrant model and 3D spatial coordinates. The chosen method involves a case study of a high performance green building in Australia that was constructed in 2008. The investigation demonstrates that the model is practical and produces an appropriate outcome, which is then compared with seven other generic types of built infrastructure. The inclusion of development scale or influence in the model is an important feature that can lead to differences in ranking preference. The findings support embedding essential environmental considerations objectively into decision-making processes via the use of an economic ratio (return on investment to energy usage), a social ratio (functional performance to loss of habitat) and a measure of sustainability risk as x, y and z coordinates respectively, plotted in 3D space.
Dynamic Repositioning of Indistinguishable Service Units on Transportation Networks

The repositioning of urban emergency units is examined analytically using the methodology of Markovian Decision Processes. In practice urban emergency vehicles e.g., fire engines are constantly subject to repositioning in order to assure a proper posture for responding quickly to future demands. The analysis assumes that there are q indistinguishable servers on the network located initially at q nodes---“The Home Locations. ” Depending on the status of other server locations, any available server can be moved to any other vacant location in the network. The states of the system are defined according to the status of each location occupied or vacant. The policy space consists of decisions on where and when to move service units for any possible state. The objective is to minimize the long term expected cost in time units of operating the system.
Exploring appropriation strategies: evidence from French high-tech firms

The aim of this paper is to examine methods of appropriability in French high-tech firms. Prior studies have found some unbalanced use and adoption of patents across sectors. Following these empirical surveys, our study focuses on the utilisation of comparative approaches to explain differences between French firms in the matter of appropriability. In order to compare these firms, this paper presents a quantitative analysis of all appropriability mechanisms, that is, patents, formal methods and strategic methods of appropriation. The study database contains information on 358 high-tech firms in France for the period 1998? 2000. The empirical results show that: 1 sectoral differences exist in the matter of knowledge appropriation; 2 few firms declared using patents as a protection mechanism; 3 lead-time on competitors is the first means of appropriation, followed by secrecy.
Ripe Tomato Recognition with Computer Vision

In order to realize the tomato harvest machinery automation, this paper presents a method for automatic recognition of ripe tomato with computer vision. First, the H color component in HSI color space is exploited as the color feature parameter for identification. The RGB tomato image acquired by computer vision is transformed into HIS image, we cut off ripe tomato region based on the gray distribution of H component using the threshold method. Then, Canny operator is used to edge detection, after corrosion expansion, the tomato centroid coordinates would be marked. Experiments proceed with the image taken by a CCD camera of tomato in different lighting conditions. The results show that, our algorithm can identify ripe tomato under natural light fast and ripe tomatoes in fields can be separated from each other with a very good recognition effect.
FAKTOR INTERNAL PERUSAHAAN YANG MEMPENGARUHI KEBIJAKAN LINDUNG NILAI

Hedging is used to protect the value of a company’s assets or liabilities from exposure to fluctuations in the value of foreign currency. This study aims to investigate the conditions and influence of firm size, growth opportunities, leverage ratio, and financial distress either simultaneously or partially to the hedge policy of BUMN listed in the IDX period of 2013-2016. The sample in this study was chosen based on purposive sampling method, obtained from 16 BUMN companies with research period from 2013-2016. Data analysis technique in this research is descriptive statistical analysis and logistic regression analysis. The results of this study indicate that firm size, growth opportunities, leverage, and financial distress simultaneously have a significant effect on hedging policy. Partially, firm size and financial distress have a significant positive effect on hedging policy, leverage has a significant negative effect on hedging policy, while growth opportunity has a positive effect not significant to hedging policy.
Personalized Recommendation System using FP-tree Mining based on RFM

A exisiting recommedation system using association rules has the problem, such as delay of processing speed from a cause of frequent scanning a large data, scalability and accuracy as well. In this paper, using a Implicit method which is not used user`s profile for rating, we propose the personalized recommendation system which is a new method using the FP-tree mining based on RFM. It is necessary for us to keep the analysis of RFM method and FP-tree mining to be able to reflect attributes of customers and items based on the whole customers` data and purchased data in order to find the items with high purchasability. The proposed makes frequent items and creates association rule by using the FP-tree mining based on RFM without occurrence of candidate set. We can recommend the items with efficiency, are used to generate the recommendable item according to the basic threshold for association rules with support, confidence and lift. To estimate the performance, the proposed system is compared with existing system. As a result, it can be improved and evaluated according to the criteria of logicality through the experiment with dataset, collected in a cosmetic internet shopping mall.
Volume CT (VCT) enabled by a novel diode technology

One of the results of the latest developments in x-ray tube and detector technology, is the enabling of computed tomography (CT) as a strong non-invasive imaging modality for a new set of clinical applications including cardiac and brain imaging. A common theme among the applications is an ability to have wide anatomical coverage in a single rotation. Large coverage in CT is expected to bring significant diagnostic value in clinical field, especially in cardiac, trauma, pediatric, neuro, angiography, Stroke WorkUp and pulmonary applications. This demand, in turn, creates a need for tile-able and scalable detector design. In this paper, we introduce the design of a new diode, a crucial part of the detector, discuss how it enables wide coverage, its performance in terms of cross-talk, light output response, maximized geometric efficiency, and other CT requirements, and compare it to the traditional design which is front-illuminated diode. We ran extensive simulation and measurement experiments to study the geometric efficiency and assess the cross talk and all other performance parameters Critical To Quality (CTQs) with both designs. We modeled x-ray scattering in the scintillator, light scattering through the septa and optical coupler, and electrical cross talk. We tested the design with phantoms and clinical experiments on a scanner (LightSpeed VCT, GE Healthcare Technologies, Waukesha, WI, USA). Our preliminary results indicate that the new diode design performs as well as the traditional in terms of cross talk and other CTQs. It, also, yields better geometric efficiency and enables tile-able detector design, which is crucial for the VCT. We introduced a new diode design, which is an essential enabler for VCT. We demonstrated the new design is superior to the traditional design for the clinically relevant performance measures.