Miracle-dz/UniFAR-FTUs huggingface dataset:
Short-term prediction of rain attenuation based on fade slope

Millimetre-wave satellite communication systems relying on uplink power control (ULPC) require a short-term predictor of likely variations of rain attenuation. Its function is to minimise the control errors over the response time of the ULPC system. Large errors will require a larger backoff for the satellite transponder and they would result in larger intermodulation products and interference levels. Presented is an experimental study of a short-term predictor of rain attenuation relying on on-line measurement of rain fade slope. Although best performance can be obtained using the last three samples of fade slope, the results indicate that a predictor assuming that rain attenuation does not change over the prediction interval is appropriate for practical purposes owing to its reasonable performance and simple implementation.
Development of Intellectual Web System for Morph Analyzing of Uzbek Words

Currently, there is an active development of the Uzbek sector of the Internet. In it, as in other national sectors, the most common form of presentation of textual information is semi-structured documents, work that presupposes the availability of reliable algorithms for text analysis, including its lexical characteristics. The article offers an intelligent web application developed for morphological analysis of words in the Uzbek language. The web application is based on the concept of generation and stem analysis of the Uzbek language word forms. A well-known Porter algorithm was chosen as the basis for stemming. The morphoanalyzer generates word forms of the Uzbek language based on the division of words into certain classes, taking into account the specifics and structure of this language. For example, nouns can be classified by meaning (related, nominal), by quantity (singular and plural), by case, and also, by the endings of belonging (possessive).
Homogenization Method to Calculate the Stiffness Matrix of Laminated Composites

New analytical models have been developed for predicting equivalent Young’s and shear moduli of laminate composites. Sets of procedures and calculations are presented in order to obtain equivalent properties in all levels, lamina and laminate. An ultimate path to predict the mechanical properties of laminated composites on the perspective of the material, orientation, and thickness has been developed. By calculating the mechanical properties using Chamis model then an Objectif function with five norms, these norms allow the mechanical properties to be examined and the ultimate answer to be predicted. Another model discusses an alternative concept of equivalent lamina elements (ELEs) by first using Chamis model for hybrid composites. Next, the ELEs are laminated in the direction and integrated into the compliance matrix for each ply. In addition, four new Generalization models for equivalence in thickness and in angle are presented in this paper. The analytical results are validated against other developed models in published articles as well as experimental results. Numerical case studies were conducted to assess the precision of results from the suggested models. The results demonstrated the capability and efficiency of the presented models for predicting the mechanical properties of multi-layer/multi-material laminate composites under different orientation conditions.
Hot carrier reliability of N-LDMOS transistor arrays for power BiCMOS applications

This paper evaluates the hot carrier performance of n-channel lateral DMOS (N-LDMOS) transistors. The N-LDMOS has been the common choice for the driver transistor in high voltage (20-30 V) smart power applications. These high drain voltages potentially make N-LDMOS hot carrier degradation an important reliability concern. This paper focuses on the hot carrier test methodology and geometry effects in N-LDMOS transistor arrays. This paper differs from previous work in that it describes for the first time the HC performance of N-LDMOS transistor arrays rather than discrete devices and discusses an N-LDMOS failure mode not yet addressed in the literature.
Enhanced through-reflect-line characterization of two-port measuring systems using free-space capacitance calculation

A through-reflect-line (TRL) calibration procedure is presented wherein the free-space capacitance and propagation factor of the line standard are used to determine the complex, frequency-dependent characteristic line impedance. The impedance is used in the conventional TRL, so the method is designated the ETRL (enhanced TRL) method. The method is applied to measurement of a microstrip via. The results show that the PCB via model used needs to be modified at frequencies above 2 GHz. >
Machine-component group formation in group technology: review and extension

Abstract The paper provides a comprehensive review of the various approaches that have been adopted in an attempt to solve the problem of forming machines into groups and components into associated families in Group Technology, A new and more efficient version of the previously published ROC algorithm, implemented interactively, is described together with a new relaxation procedure for bottleneck machines.
Improving Hospital Performance by Use of Lean Techniques: An Action Research Project in Brazil

ABSTRACT This article presents the implementation of Lean health care techniques in a surgery department of a Brazilian hospital. The proposed Lean methodology is based on a set of nested improvement cycles that are used to continuously improve the value chain. The results of the implementation showed improvement in cycle time, capacity, and savings in costs. Another important improvement was a significant reduction of 94 percent in the index of delayed surgery due to the lack of materials and a reduction in postsurgery infection.
Pemodelan Jumlah Kasus Kusta di Kabupaten Mojokerto dan Kabupaten Jombang Tahun 2019 Menggunakan Regresi Zero-Inflated Poisson Inverse Gaussian

Kusta atau lepra adalah penyakit yang menyerang berbagai bagian tubuh diantaranya saraf dan kulit yang disebabkan oleh infeksi bakteri Mycobacterium leprae. Jawa Timur merupakan provinsi dengan jumlah penderita kusta tertinggi di Indonesia hingga tahun 2019 sebanyak 3.306 kasus. Stigma negatif masyarakat terhadap penderita kusta menyebabkan munculnya perkampungan kusta di dusun Sumberglagah, Kabupaten Mojokerto. Selain adanya kampung kusta, pada Kabupaten Mojokerto juga terdapat rumah sakit kusta terbesar di Jawa Timur yang menjadi pusat pengobatan kusta baik di Kabupaten Mojokerto maupun di daerah sekitarnya seperti Kabupaten Jombang. Penelitian ini menggunakan data jumlah kasus kusta di Kabupaten Mojokerto dan Kabupaten Jombang tahun 2019 sebagai variabel respon dan enam variabel lainnya sebagai variabel prediktor. Data jumlah kasus kusta tersebut memiliki proporsi nilai nol sebesar 30,77%, lalu nilai mean sebesar 2,179 serta varians sebesar 6,625. Hal ini mengindikasikan bahwa adanya extra zeros serta terdapat pelanggaran asumsi equidispersi. Regresi Zero Inflated-Poisson Inverse Gaussian (ZIPIG) merupakan metode pengembangan regresi yang mampu menangani overdispersi serta extra zeros pada variabel respon data observasi. Faktor yang berpengaruh signifikan terhadap jumlah kasus kusta berdasarkan hasil pemodelan regresi ZIPIG yaitu persentase pelayanan kesehatan untuk penduduk usia lanjut (X6).
The Effectiveness of Table-Top Exercises in Improving Pandemic Crisis Preparedness

The World Health Organization carried out a global survey in 2018 to ascertain the level of preparedness for pandemic influenza. It was discovered that simulation exercises to test national pandemic influenza preparedness plans were carried out in the previous 5 years, by 42 out of the 104 countries that completed the survey. The table-top exercise (TTX) being the preferred format, with 86% of the countries using them. Although no table-top exercise can convey a realistic picture of a pandemic, they can be used to assess plans, policies, and procedures, clarify roles and responsibilities, and identify resource gaps in an operational environment. However, table-top exercises are only effective if they are properly designed, carefully conducted, fully evaluated, and most importantly, the results and recommendations identified are actually implemented. TTXs used as part of preparedness for pandemics are not cost free, a failure to implement the lessons learned from them can have both human and economic consequences. To understand the value of TTXs, a sample of national and large scale TTXs are examined in an effort to identify the effectiveness of table-top exercises, as a part of improving pandemic crisis preparedness.
Investigation of Thermophysical Properties of Nanomagnetite-based Polymer Materials

In this work, samples of magnetite nanoparticles are synthesized using various synthetic methods. It is shown that of the existing methods of magnetite synthesis, the most widespread is the method of coprecipitation of Fe2+ and Fe3+ salts. Less common, but of interest due to the slower and more controlled kinetics of particle nucleation, is the Fe2+ oxidation method. However, magnetite is unstable and under external influences its phase transition to maghemite can occur, which leads to a change in magnetic characteristics and a change in biological responses. After analyzing the results of the study of samples by the XRD method, the following conclusions can be drawn: The magnetite phase was identified by the characteristic peaks in the diffraction patterns for all samples, except for the sample with EDTA, which may be a consequence of an insufficient amount of the introduced oxidant, or poor diffusion of the oxidant to iron ions due to the formed chelate complex. It can be concluded that magnetite is a promising material for its use in industry and medicine.
Coupled Dynamic Modeling and Control of Aerial Continuum Manipulation Systems

Aerial continuum manipulation systems (ACMSs) were newly introduced by integrating a continuum robot (CR) into an aerial vehicle to address a few issues of conventional aerial manipulation systems such as safety, dexterity, flexibility and compatibility with objects. Despite the earlier work on decoupled dynamic modeling of ACMSs, their coupled dynamic modeling still remains intact. Nonlinearity and complexity of CR modeling make it difficult to design a coupled ACMS model suitable for practical applications. This paper presents a coupled dynamic modeling for ACMSs based on the Euler–Lagrange formulation to deal with CR and the aerial vehicle as a unified system. For this purpose, a general vertical take-off and landing vehicle equipped with a tendon-driven continuum arm is considered to increase the dexterity and compliance of interactions with the environment. The presented model is independent of the motor’s configuration and tilt angles and can be applied to model any under/fully actuated ACMS. The modeling approach is complemented with a Lyapunov-wise stable adaptive sliding mode control technique to demonstrate the validity of the proposed method for such a complex system. Simulation results in free flight motion scenarios are reported to verify the effectiveness of the proposed modeling and control techniques.
Design of dielectric immersed tapered slotline antenna for radar‐based microwave breast imaging

An ultra‐wideband, dielectric‐immersed antenna has been developed for a breast tumor detection system. The antenna is a tapered slotline that operates in a low permittivity dielectric. The sensor is fed by an ultra‐wideband microstrip‐to‐slotline balun. Simulations of the balun and the tapered profile demonstrate that reflection coefficient bandwidth of each structure spans 2–12 GHz. The antenna and balun are implemented with a photolithography process, and good agreement is obtained between simulated and measured results for the entire structure. To evaluate the suitability of the antenna for the intended application, measurements are performed with a variety of objects placed in a homogeneous background. Detection and location of the objects are explored. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 633–638, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24112
Effect of Mechanical Aeration on Nitrogen and Microbial Activity in Sediment-Water Interface from Urban Lake

Aeration was one of the common techniques which were focused in environmental engineering research. In this study, experiments were carried out to investigate the effect of aeration on nitrogen (N) fractions and its transformation in the sediment-water interface from urban lake. In addition, we measured the dehydrogenase (DHA) and Chla content in surface sediment to detect the changes of the microbial activity. The aim is to explore the regulation of N migration and transformation in the water-sediment interface during the treatment work of lake pollution. By mechanical aeration, we control the DO content of the overlying water at the range of 1.2-1.5 kg/L, 2.5-4.5 mg/L and 6.1-6.2 mg/L. Results showed that DO in overlying water play a role to the variation of N in water-sediment interface. NH4+-N was the mainly N fraction released from sediment, the lower DO concentration (1.2-1.5 mg/L) in overlying water is favorable to the release of NH4+-N from sediment. Whether under aerobic or anaerobic condition, the releasing of NH4+-N from sediment were both higher than its consumption in the overlying water. The benthic microbial activity of the surface sediment (0-2 cm) was higher than that from bottom (6-8 cm). And the microbial activity in surface sediment was in optimum range when the overlying water DO content was about 2.5-4.5 mg/L.
WhatsApp Web for academic purposes in times of covid-19

One of the most used communication tools is WhatsApp, which increased its use due to covid-19, along with other social networks. In the educational field, students are also increasingly adopting this application for academic purposes from their computers called WhatsApp Web. However, more knowledge is needed about the factors that influence the acceptance and use of this social network. Therefore, the purpose of this study is to understand from the perspective of students the factors of acceptance and use of WhatsApp Web for academic purposes during the covid-19 pandemic. A qualitative methodology was used to achieve this objective, through fourteen semistructural interviews with students from various disciplines and universities. The findings of this study were analyzed with the unified theory of acceptance and use of technology (UTAUT). Where a fifth factor teamworkwas incorporated, being additional to the factors already existing in this theory (the expectation of performance, the expectation of effort, the social influence and the facilitating conditions). This study provides new insights as it is a pioneering research that UTAUT uses to interpret the acceptance and use of WhatsApp Web for academic purposes.
Analysis of Performance and Rotordynamic Force Coefficients of Brush Seals With Reverse Rotation Ability

Multiple-shoed brush seals represent an alternative to resolve poor reliability resulting from bristle tip wear while also allowing for reverse rotation operation. The novel configuration incorporates pads contacting the shaft, and which under rotor spinning; lift off due to the generation of hydrodynamic pressures. The ensuing gas film prevents intermittent contact; thus lowering the operating temperature and thermal distortions, and even eliminating bristles’ wear. A computational analysis for the equilibrium and dynamic forced response of a brush seal with reverse rotation capability is presented. Small amplitude rotor motions about an equilibrium position lead to a nonlinear partial differential equation for the static pressure field, and a set of first order linear partial differential equations to determine the rotordynamic force coefficients, stiffness and damping, as function of the excitation frequency and other operating conditions. Predictions for the stiffness and damping coefficients of a 20 shoe-brush seal configuration operating over a range of rotor speeds are detailed. The parametric study varies the nominal gas film thickness, the supply to discharge pressure ratio, and the bristle bed structural loss (damping) coefficient. The results show that the film clearance and supply to discharge pressure ratio do not affect the shoed-brush seal force coefficients. On the other hand, the direct stiffness drops rapidly as the operating speed increases. The shoed-brush seal offers whirl frequency ratios much lower than 0.50 due to the (structural) damping arising from friction among the brush seal bristles.Copyright © 2004 by ASME
Occurrence of Trajectory Chaos and It’s Stabilizing Control Due to Dead Time of a Pneumatic Manipulator

This research on a 2-link pneumatic manipulator develops from the occurrence of chaos phenomena and it’s stabilizing control in following a circular trajectory by considering a dead time in the system. In generally it is difficult for this manipulator to follow a desired trajectory, because chaos is often caused in the manipulator with a dead time of the pneumatic signal transmitted through the long air tube. In order to solve this kind of problem, the chaos behavior is made clear by recording the Lyapunov exponent of the trajectory, and a new stabilizing method with a neural network is proposed. Through simulations and the experiment, the occurrence of chaos and the possibility of stabilization are verified by using the proposed method.
Mothers’ experience of being involved with the transfer of the CO-OP approach: A qualitative study

Introduction Since mothers are the best persons to facilitate transfer in their children, it is important to understand their experience with implementing the cognitive orientation to daily occupational performance approach at home. Therefore, this study aims to explore mothers’ experiences in facilitating transfer during implementing cognitive orientation to daily occupational performance approach at the home in children with specific learning disorder. Method A semi-structured interview was applied for mothers of children receiving cognitive orientation to daily occupational performance. The interviews were transcribed verbatim and the data were analyzed using a continuous comparison technique and inductive content analysis. Results Five themes emerged which described the mothers’ experiences of being involved with the transfer of cognitive orientation to daily occupational performance approach at home including (1) mothers’ feelings toward themselves; (2) supportive therapist; (3) supportive social settings; (4) multidimensional educational content; and (5) educational methods. Conclusion Mothers expressed that cognitive orientation to daily occupational performance approach was simple, but they needed deeper information and skills. They provided suggestions for increasing the involvement during cognitive orientation to daily occupational performance intervention to increase transfer.
High selectivity and CM suppression wideband balanced BPF

In this letter, a novel wideband balanced bandpass filter (BPF) with high selectivity and common‐mode (CM) suppression is constructed with slotline resonator. When the intersection points of the microstrip feedline and slotline resonator are close to the midpoint of the slotline resonator, the coupling between the second mode and microstrip feedline can be suppressed. Making use of this feature, the wideband single‐ended filter with wide upper‐stopband performance is designed using the slotline resonators and two quarter‐wavelength microstrip resonators paralleled to the slotline resonator with tapped‐line coupling at their short‐circuited ends. Further, high‐selectivity fifth‐order wideband single‐ended filter and corresponding balanced BPF are designed with parallel coupling structures between two slotline resonators. The fifth‐order wideband balanced filter is designed and fabricated, and good agreement between measurements and simulations is obtained. The measured CM suppressions are better than 54 dB within the whole differential‐mode passband. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2998–3003, 2014
Wave Structures for Nonlinear Schrodinger Types Fractional Partial Differential Equations Arise in Physical Sciences

Nonlinear partial differential equations are mostly renowned for depicting the underlying behavior of nonlinear phenomena relating to the nature of the real world. In this paper, we discuss analytic solutions of fractional-order nonlinear Schrodinger types equations such as the space-time fractional nonlinear Schrodinger equation and the (2+1)-dimensional time-fractional Schrodinger equation. The considered equations are converted into ordinary differential equations with the help of wave variable transformation and then the recently established rational ( )-expansion method is employed to construct the exact solutions. The obtained solutions have appeared in the forms of a trigonometric function, hyperbolic function, and rational function which are compared with those of literature and claimed to be different. The graphical representations of the solutions are finally brought out for their physical appearances. The applied method is seemed to be efficient, concise, and productive which might be used for further research. Mathematics Subject Classifications: 35C08, 35R11
A mosaic approach for unmanned airship remote sensing images based on compressive sensing

The recently-emerged compressive sensing (CS) theory goes against the Nyquist-Shannon (NS) sampling theory and shows that signals can be recovered from far fewer samples than what the NS sampling theorem states. In this paper, to solve the problems in image fusion step of the full-scene image mosaic for the multiple images acquired by a low-altitude unmanned airship, a novel information mutual complement (IMC) model based on CS theory is proposed. IMC model rests on a similar concept that was termed as the joint sparsity models (JSMs) in distributed compressive sensing (DCS) theory, but the measurement matrix in our IMC model is rearranged in order for the multiple images to be reconstructed as one combination. The experimental results of the BP and TSW-CS algorithm with our IMC model certified the effectiveness and adaptability of this proposed approach, and demonstrated that it is possible to substantially reduce the measurement rates of the signal ensemble with good performance in the compressive domain.
The Transformation Of Stone

In this body of work I attempt to discuss transformation on three levels: material, concept, and expression. The sculptures created for this thesis were inspired by the physical characteristics of stone as a material as well as by the scientific study of stones as geologic specimens. The third influence was the Chinese practice of selecting and displaying stones as "Gongshi" which translates as "Scholars' Rocks. "