Miracle-dz/UniFAR-FTUs huggingface dataset:
Earth observation system incorporating an LCTF spectropolarimeter

There is an emerging demand for remote sensing technologies that can determine the surface characteristics of objects from the properties of reflected light. In particular, hyperspectral analysis of solar rays reflected from the Earth's surface is expected to play an increasingly important role in Earth environment observation. The National Aerospace Laboratory (NAL) has developed a new type of imaging spectropolarimeter for such analysis that uses a liquid crystal tunable filter (LCTF), and efforts are now under way to develop it into a practical aircraft or spacecraft on-board sensor system for Earth environment sensing. This paper first presents the concept and architecture of an Earth observation system using an LCTF optical sensor which can sense radiation in the 400-720 nm wavelength band. The results of laboratory experiments to evaluate the performance characteristics of the observation system, e.g. hyperspectral resolution, optional selection of the plane of polarization, etc. are then presented, and the results of preliminary image acquisition experiments that demonstrate the feasibility of acquiring of spectral images is also shown. Finally, the applicability of the LCTF spectropolarimeter to Earth observation is summarized based on the results of the laboratory and field evaluation experiments.
Fault Diagnosis of Transformer Based on RBF Neural Network

According to the characteristics of fault types of the transformer ,RBF neural network is used to diagnose transformer fault. The paper regards six gases as inputs of the neural network and establishes RBF neural network model which can diagnose six transformer faults: low temperature overheat, medium temperature overheat, high temperature overheat, low energy discharge, high energy discharge and partial discharge . The Matlab simulation studies show that transformer fault diagnosis model based on RBF neural network diagnosis for failure beyond the traditional three-ratio method. The rate of the transformer fault diagnosis accuracy reaches 91.67% which is also much higher than the traditional three ratio method.
HARD: SUBJECT-BASED SEARCH ENGINE MENGGUNAKAN TF-IDF DAN JACCARDS COEFFICIENT

This paper proposes a hybridized concept of search engine based on subject parameter of High Accuracy Retrieval from Documents (HARD). Tf-Idf and Jaccard's Coefficient are modified and extended to providing the concept. Several illustrative examples are given including their steps of calculations in order to clearly understand the proposed concept and formulas. Abstract in Bahasa Indonesia : Paper ini memperkenalkan suatu algorima search engine berdasarkan konsep HARD (High Accuracy Retrieval from Documents) dengan menggabungkan penggunaan metoda TF-IDF (Term Frequency Inverse Document Frequency) dan Jaccard's Coefficient. Kedua metoda, TF-IDF dan Jaccard's Coefficient dimodifikasi dan dikembangkan dengan memperkenalkan beberapa rumusan baru. Untuk lebih memudahkan dalam mengerti algoritma dan rumusan baru yang diperkenalkan, beberapa contoh perhitungan diberikan. Kata kunci: HARD, Tf-Idf, koefisien Jaccard, search engine, himpunan fuzzy.
Inrush-modeling of a single-phase 1-MVA-HTS (High Temperature Superconducting)- transformer for rail vehicles

A 1-MVA-HTS-transformer has been designed, manufactured and tested according to specifications for rail vehicles as has been reported. The HTS-transformer for railway drive systems has to meet the demands of the rough operational conditions-comparable to conventional copper-oil-transformers. One main focus is the energizing of the transformer by switching via the vacuum main circuit-breaker to the grid. Due to the very small AC-ohmic resistance of HTS-transformers, a higher efficiency is offered. In contrary, the reduced ohmic resistance acts as an insufficient damper of the inrush current. Based on measurements of the inrush current of conventional transformers in rail vehicles, a special HTS-transformer-model has been used to predict the behavior of the inrush of a future HTS-transformer. Investigations of interacting parameters and damping possibilities according to the requirements of railroad companies were done. An additional damping resistor can be the best economical solution to damp the inrush current.
A competitive progression perspective of JIT systems: evidence from early US implementations

This study investigates the holistic implementation of just-in-time (JIT) manufacturing. We contend that the most important elements of holistic JIT systems – focused factory, reduced setup times, group technology, total productive maintenance, multifunction employees, uniform workload, just-in-time purchasing, Kanban, total quality control and quality circles – should be implemented in a sequential manner for a firm to reap sustainable operational gains. The right sequence of implementation of JIT practices is derived using the theory of competitive progression and based on four JIT practice bundles – conformance quality related practices, delivery reliability related practices, volume flexibility related practices and low cost related practices. Data collected in a cross-sectional field study of US manufacturers are used to test the suggested implementation sequence of JIT practices and the impact of the JIT practice bundles on improvement in non-value added performance. The results indicate that implementations of JIT management practices should be in the order – first, conformance quality related practices; second, delivery reliability related practices; third, volume flexibility related practices and; finally low cost related practices. In addition, significant improvement in operational performance, as reflected in improvement of non-value added performance, is achieved via the cumulative capability building.
Time domain sensing in abrupt fiber taper based Mach-Zehnder interferometer

A new time domain sensing scheme using a compact single abrupt taper-based standard single mode fiber Mach- Zehnder interferometer is proposed, tested and simulated. The interferometer consists of cascaded symmetrical abrupt 3 dB taper regions separated by a middle interfering section. After the interfering middle section, the cladding modes are converted back into core mode. Due to the external stimuli applied to the interferometer, change of refractive index and the optical path length are induced, resulting in phase difference of core and cladding modes, and hence, the output optical signal in the time domain. The proposed scheme promises a simple and sensitive approach to optical sensing.
Probability Distribution of Secondary Arc Duration on Solar Array

Secondary arc on satellite solar array is sometimes fatal to spacecraft operation by damaging insulation of solar array string circuit. A proper ground test method is necessary to correctly assess the risk of secondary arc from the probability of occurrence in orbit. Ground experiments are carried out to investigate the statistics of temporary sustained arc duration. It is found that the secondary arc duration can be modeled as a combination of multiple Poisson distributions. Once we know the formula of the Poisson distribution, we can easily calculate the probability of secondary arc lasting longer than an acceptable limit, drastically reducing the testing cost. The number of secondary arc duration data to define the Poisson distribution formula is also discussed.
Conceptualising the essential qualities of complex adaptive leadership: networks that organise

Complex adaptive organisations are represented in many ways. Complex adaptive organisations depend on the interaction of members exchanging information and resources shared influence. Leading is enacted by people with generative and unifying capabilities (Hazy, 2011). Complex organisations manifest networked patterns of interaction between leaders who can span traditional organisation and environment boundaries. Knowing leader networks as incompressible structures in nested eco-systems seems a concept well-suited for conceptualising organisations of leaders where small changes by one leader can impact the entire system. By way of presenting organisation study findings from a recent network analysis of large scale state-wide shared service in a new light in this paper, this author explicates the essential qualities of complex adaptive emergent leadership networks to suggest new ways for conceptualising truly complex leadership in contemporary organisations by engaging the principles of network theory and complexity.
Pavement Shear Strain Response to Dual and Wide-Base Tires

FHWA conducted controlled loading tests on the US-23 test road in hot weather conditions in Ohio. The tests used four tire types in both dual and wide-base configurations, which were fitted on a single unit two-axle truck, maintaining a constant gross vehicle weight. Two pavement sections, one 8 in. (200 mm) and one 4 in. (100 mm) thick, were instrumented with strain gauge rosettes oriented vertically to measure strain traces induced from the passing wheel loads at three speeds and tire inflation pressures. Pavement temperature was monitored with depth during testing as well as wheel track offset distance from the strain sensors. Because of time constraints, only the sensors in the plane parallel to the direction of loading were analyzed, and response data were compared only with linear elastic pavement response models. The as-measured data were processed and evaluated for all rosettes oriented in the direction of loading. Stress relaxation modulus data were used to adjust the pavement modulus to a common temperature and loading time so all measured data could be compared at the same loading conditions. The WinLEA linear elastic model was used to determine the relationship of structural modulus to strain. Lateral offset distributions were determined from measured data to adjust all strains to the offset where maximum strain response is observed in the as-measured data. The adjustments were then applied to the as-measured strain data to make consistent comparisons between tires. Three of the four tire configurations produce nearly equivalent pavement response, which was attributed to similarities between the tire footprint widths.
VIABLE SYSTEMS MODEL AND QUALITY OF HOSPITALITY SERVICES

This paper discusses the design of a model for service quality in hospitality concepts and proposals using the Viable System Model (VSM) of S, Beer. The object of study is a human activity system whose complexity must be addressed through systemic methods. The study identifies the elements to be considered for a system design approach (with emphasis on quality of service) through the establishment of internal and external environments that integrate it. Through the analysis it is determined that the hotels can function as viable systems, ie may be able to absorb the complexity through the generation of internal tools to manage it.
3-D modeling of luminescent coupling effects in multijunction concentrator solar cells

In this work, we demonstrate an improved 3-D distributed circuit model to analyze the luminescent coupling effects in multijunction concentrator solar cells. We implemented the 3-D distributed circuit model and compared the simulation results with experimental data measured on GaAs/GaInNAsSb solar cells. The results from simulations implementing this 3-D model match well with the experimental data under different illumination conditions. In addition, with the 3-D model simulation results we visualized the space-variant luminescent coupling current under different spectral profiles. We demonstrate the effects of luminescent coupling on I-V characteristics and current density distributions in the cells. Our 3-D model will enable more precise modeling and more detailed performance analysis of concentrator solar cells.
Self-consistent simulation of radio frequency multipactor on micro-grooved dielectric surface

The multipactor plays a key role in the surface breakdown on the feed dielectric window irradiated by high power microwave. To study the suppression of multipactor, a 2D electrostatic PIC-MCC simulation code was developed. The space charge field, including surface deposited charge and multipactor electron charge field, is obtained by solving 2D Poisson's equation in time. Therefore, the simulation is self-consistent and does not require presetting a fixed space charge field. By using this code, the self-consistent simulation of the RF multipactor on the periodic micro-grooved dielectric surface is realized. The 2D space distributions of the multipactor electrons and space charge field are presented. From the simulation results, it can be found that only half slopes have multipactor discharge when the slope angle exceeds a certain value, and the groove presents a pronounced suppression effect on the multipactor.
Rückführbare Erzeugung hochfrequenter elektromagnetischer Felder (Generation of RF Electromagnetic Fields Traceable to SI Units)

Für die Kalibrierung von Hochfrequenz-Feldstärkemessgeräten sind HF-Felder mit genau bekannter Stärke und hinreichendem Volumen erforderlich. Grundlegende Verfahren zur Erzeugung solcher Felder mit TEM-Wellenleitern und Antennen werden beschrieben und gegenübergestellt.
The Design of a Microstrip Antenna with Radiation Pattern Controlled

Microstrip Antennas have many applications in various communication systems. A new configuration of microstrip antenna is proposed in this paper. The microstrip antenna has two radiation ports. Through changing the radiation intensity of the two ports, the proposed structure breaks the balance of the radiation of the microstrip antenna therefore the radiation pattern would be changed corresponsively. Theory analysis is carried out based on microstrip antenna theory. Both analysis and simulation show that the new configuration can realize the radiation pattern controlled and the theory analysis agreed very well with simulation.
An Augmented Reality Audio Mixer and Equalizer

In Augmented Reality Audio (ARA) applications the real sound environment of the user is extended with virtual objects. The real environment is reproduced as a pseudo-acoustic world via a special ARA headset that consists of binaural microphones and headphones. However, the headset causes coloration to the pseudoacoustic representation. In order to make the headset acoustically transparent, equalization is needed. Digital equalization easily causes unacceptable delays. This paper presents a novel ARA mixer with real-time analog equalization to correct the coloration caused by the leakage through the headset and changed resonances in the closed ear canal.
Power balance control and voltage conditioning for fuel cell converter with multiple sources

Due to the long time-constant of the fuel cell, the generated power and load become unbalanced under dynamic conditions, resulting in control difficulty for a front-end DC-DC converter. To maximize the fuel cell output power, a current control is employed; however, the DC bus voltage becomes unregulated. Thus, a voltage conditioner utilizing a battery source is proposed to balance the power and stabilize the DC bus voltage. Control design for the front-end DC-DC converter and voltage conditioner are presented. Based on the design, simulation is performed and the results are shown to verify the control strategy.
In-plane stiffness of reinforced concrete slabs under compressive membrane action

The ultimate load capacity of reinforced concrete slabs laterally restrained at their perimeter supports is very sensitive to the in-plane stiffness of the surrounds and of the slab itself An examination of previous experimental work suggests that the assumption of an elastic full depth of element, which is frequently used for the slab self-stiffness in the theoretical load prediction of compressive membrane slabs, is an overestimate. In a programme of experimental work on elements under combined bending moment and axial force reflecting the stress states at fixed stages during yield of a one-way spanning slab, the axial stiffness was shown to be dependent upon the stress state and considerably less than the full depth stiffness.
Mental chronometry in big noisy data

Temporal measures (latencies) in the event-related potentials of the EEG (ERPs) are a valuable tool for estimating the timing of mental processes, one which takes full advantage of the high temporal resolution of the EEG. Especially in larger scale studies using a multitude of individual EEG-based tasks, the quality of latency measures often suffers from high and low frequency noise residuals due to the resulting low trial counts (because of compressed tasks) and because of the limited feasibility of visual inspection of the large-scale data. In the present study, we systematically evaluated two different approaches to latency estimation (peak latencies and fractional area latencies) with respect to their data quality and the application of noise reduction by jackknifing methods. Additionally, we tested the recently introduced method of Standardized Measurement Error (SME) to prune the dataset. We demonstrate that fractional area latency in pruned and jackknifed data may amplify within-subjects effect sizes dramatically in the analyzed data set. Between-subjects effects were less affected by the applied procedures, but remained stable regardless of procedure.
Modeling, development and diffusion of hypermedia-internet applications for the brazilian rural sector

Brazil is a developing country in the midst of major social, economic, technological, cultural, and educational change. In the areas of technology and education, the transfer of information and knowledge, with the support of hypermedia applications, Internet, and distance learning have been a major concern of public and private entities, especially in regards to agriculture and animal production. In a country with approximately 195 million inhabitants and 8.5 million square kilometers, where the rural sector accounts for 25% of gross domestic product, 30.3% of exports, and 37% of jobs1, the use of information and communication technologies in education and inclusion is fundamental to promoting developmental strategies and citizenship. In this study, we sought to describe the process of modeling, development and dissemination of hypermedia applications for the Brazilian rural sector, taking as a case unit, the â€œDigital Citizenâ€ Internet portal. A qualitative research, with exploratory-descriptive goals, and a case study based on documentary and observation is presented. In the current research and beyond, the practices related to modeling, development, and dissemination of hypermedia applications via distance learning (MoodleÂ® and FlashÂ®), as well as investigations and discussions involving government processes and practices related to digital inclusion and social development of rural citizen Brazil are specified. We conclude that Brazil is tackling the challenge of digital and social inclusion, based on a project whose main components included (a) deploying an infrastructure for telephone and broadband across the rural areas, (b) offering free internet in public schools and rural communities, (c) promoting projects and companies that work with hypermedia applications, and (d) supporting initiatives that involve the development and provision of services at a distance. The rural citizen has been able to maintain his residence in their midst with quality of life.
Reactive impedance surface-based broadband circularly polarized Koch fractal boundary microstrip antenna

A circularly polarized (CP) broadband antenna is proposed for wireless applications in the range of 2–3 GHz frequency. It consists of asymmetrical Koch fractal boundary patch over a reactive impedance surface (RIS) substrate. The simulations of single-layer Koch fractal antenna, dual layer with square and fractal RIS elements are carried out in a systematic way for broadband CP radiation and corresponding results are presented. For better CP characteristics, properties of fractal curves and dimensions of RIS elements are optimized. The antenna with fractal RIS iteration order one (iteration1) is experimentally studied. The 10-dB return loss bandwidth is 50.35%, whereas 3-dB axial ratio bandwidth is 7.45%, which indicate that by applying fractals concept to RIS technique, with a single probe feed, broadband CP radiation can be obtained.
Partial discharge patterns and the identification of defects in high voltage stator windings insulation

Reliable operation of high voltage (HV) equipment depends largely on the integrity of its insulation. Therefore, the condition of insulating systems, and the early prediction of faults and problems are of major concern to high voltage equipment's manufacturers and users. They allow corrective maintenance and planning and reduce the overall maintenance costs. Partial Electrical discharges (PD) are both a factor that can cause the degradation, ageing and breakdown of HV insulation systems, and an indicator of the actual state and condition of the insulation. Thus, reliable periodic measurement and interpretation of PD activities are of great importance to manufacturer and user of HV equipment. They can enable the detection of a range of insulation problems, which can then be addressed in order to prevent the occurrence of failure and controlled outage of equipment. The introduction of computers and digital equipment has greatly benefited the detection, measurement and identification of PDs. It has allowed better analysis and interpretation of complicated discharge distributions, and providing fast data acquisition, processing and vast amounts of memory space for data storage. An on-line partial discharge detection system has been developed by ELECO (Dowding & Mills), based on more than 12 years experience of PD field tests. The system has been used over the years to monitor, and evaluate the condition of insulating used in the stator windings of HV machines. This paper discuses the relation between the discharge patterns and identification of insulation problems in high voltage stator windings, and how this can help the manufacturer and user to assess ageing and controlled outage of equipment. Practical typical examples from site tests, demonstrating this relationship, are also presented.
An alternative approach for the seismic rehabilitation of existing RC buildings using seismic isolation

Usually, buildings with seismic isolation are designed to comply with an operational building performance level after strong earthquakes. This approach, however, may limit the use of seismic isolation for the seismic rehabilitation of existing buildings with low lateral strength or substandard details, because it often requires invasive strengthening measures in the superstructure or the use of expensive custom‐made devices. In this paper, an alternative approach for the seismic rehabilitation of existing buildings with seismic isolation, based on the acceptance of limited plastic deformations in the superstructure under strong earthquakes, is proposed and then applied to a real case study, represented by a four‐storey RC frame building. Nonlinear response‐time histories analyses of an accurate model of the case‐study building are carried out to evaluate the seismic performances of the structure, comparing different rehabilitation strategies with and without seismic isolation. Initial costs of the intervention and possible (future) repair costs are then estimated. Based on the results of this study, values of the behavior factor (i.e. response modification factor) higher than those adopted in the current codes for base‐isolated buildings are tentatively proposed. Copyright © 2015 John Wiley & Sons, Ltd.