Miracle-dz/UniFAR-FTUs huggingface dataset:
Advantages of utilizing through‐silicon‐vias in SiGe HBT RF low‐noise amplifier design

The benefits of using through‐silicon‐vias (TSVs) in silicon‐germanium (SiGe) heterojunction bipolar transistor (HBT) low‐noise amplifiers (LNAs) over the conventional wire bonding have been investigated for the first time. The parasitics associated with wire bonding can be significantly minimized with TSVs, thereby reducing the LNA performance degradation at the packaging level. To verify simulations and theoretical analysis, a prototype K‐band TSV‐integrated LNA was implemented in a SiGe HBT platform. The parasitic inductance of TSVs was effectively utilized as an adjustable matching element for the optimum LNA performance. The proposed LNA exhibits minimal degradation compared to the (unpackaged) LNA with probe‐supplied ground. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2703–2706, 2015
CMOS quadrature VCO using a passive coupling device

This article presents a new fully‐integrated quadrature voltage‐controlled oscillator (QVCO), which consists of two differential VCOs coupled via an inductor‐ring. The proposed CMOS QVCO has been implemented with the TSMC 0.18‐μm CMOS technology and the die area is 0.693 × 0.976 mm2. At the supply voltage of 0.7 V, the total power consumption is 2.58 mW. The free‐running frequency of the QVCO is tunable from 5.15 to 5.55 GHz as the tuning voltage is varied from 0 to 0.7 V. The measured phase noise at 1 MHz frequency offset is −120.88 dBc/Hz at the oscillation frequency of 5.28 GHz and the figure of merit of the proposed QVCO is −191.21 dBc/Hz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:310–313, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27283
Understanding teachers’ job satisfaction and flow: the dual process of psychological needs

Abstract Drawing from self-determination theory, the current study examined how teachers’ satisfaction or frustration of psychological needs might be related to their job satisfaction, intention to leave, and flow experience during teaching (N = 143, K-12 teachers in the Midwestern U.S.). In support of the Dual Process Model, the current results revealed the different predictive utility of need satisfaction vs. frustration for each of three needs. Specifically, need satisfaction was a stronger predictor of positive outcomes (e.g. job satisfaction and flow) than need frustration while need frustration was a stronger predictor of negative outcomes (e.g. intention to leave) than need satisfaction. Job satisfaction was predicted by all three types of psychological needs (competence, relatedness, and autonomy). Unlike job satisfaction, teachers’ intention to leave was mostly tied to the need for autonomy, and teachers’ enjoyment of teaching (flow experience) was primarily a function of the need for competence. Educational and policy implications are discussed.
CPW-fed log-periodic dumb-bell slot antenna array

A coplanar waveguide (CPW) fed log-periodic dumb-bell slot antenna array is presented. Due to the log-periodic structure and dumb-bell slot, the proposed antenna operates as a frequency independent antenna. The antenna is printed on a substrate with a single metal layer and therefore is easily constructed. The measured return loss and radiation patterns are also included.
Identification of De-Bonding Between Steel Bars and Concrete Using Wavelet Techniques: Comparative Study

Abstract The interface between steel bar and concrete plays an important role in retaining the strength of reinforced concrete structures. When the interface is damaged by cracking, de-bonding between the two materials and/or other kinds of damage, significant degradation of the structural performances will occur owing to loss of composite actions. In this study, wave propagation on several steel bars embedded in two concrete plates with different de-bonding scenarios is tested. Piezoelectric actuators and sensors are attached to steel bars for recording input and response signals. This paper uses the wavelet transform combined with the wavelet packet decomposition, component energy and Shannon entropy to analyse the experimental results. The results demonstrate that both damage index and relative entropy are sensitive to the existence of de-bonding damage and change linearly with de-bonding length when there is only a single de-bonding damage, while energy and entropy distribution are largely influenced by the property of the excitation signal. When multiple de-bonding exists, however, both the damage index and relative entropy have no such clear tendency.
Simulation von Lichtszenen in Game Engines für Virtual Reality

Tageslicht auf einer Virtual Reality-Brille konnte in der Zukunft eine Alternative fur die Behandlung immobiler Patienten oder die Durchfuhrung lichttechnischer Probandenversuche darstellen. Wahrend die bisherigen Studien zur Licht- und Raumwirkung von Virtual Reality (VR) vorranging 360°-Panoramen aus lichttechnischen Simulationsprogrammen oder HDR-Kameraaufnahmen verwendet haben, wird beim Einsatz 3D-modellierter Szenen, in denen der Proband mit seiner naturlichen Bewegung navigieren kann, die Lichtsimulation in der Game Engine durchgefuhrt. Um eine Einschatzung der daraus entstehenden Limitationen zu geben, werden in diesem Paper zunachst die Voraussetzungen fur eine akkurate lichttechnische Visualisierung in Game Engines definiert. Dabei wird vor allem auf die Anforderungen an Lichtquellen sowie Materialien eingegangen. Auf Basis, unter anderem, der CIE 171:2006 werden weiterfuhrende Vorschlage zur detaillierten Validierung von Lichtsimulationen in Game Engines gemacht.
Configuration Design of the Adaptive Suspension Vehicle

The selection of vehicle and leg configuration and of power transmission and actuation system configuration for the adaptive suspension vehicle (ASV) are discussed. The ASV will be a proof-of-concept prototype of a proposed class of transportation vehicles for use in terrain that is not passable for conventional vehicles. It uses a legged locomotion princi ple. The machine will not be an autonomous "robot, " in the sense that it will carry an operator. It will, however, have a very high level of machine intelligence and environmental sensing capability. Much of the technology involved is unique and has potential for application to future robot systems. In this paper, major aspects of the vehicle and leg geometry, the on-board processing configuration, and the hydrostatic power transmission system are discussed.
A Practical Approach for Digital Forensic Triage

In order to uncover truths to serve justice, case-related data collected from a digital investigation requires substantial resources to analyze, especially in time-critical situations. At present, however, digital forensics has not evolved to meet this ever-increasing demand. Digital forensic triage is a promising solution, as it is designed to maximize the use of resources according to a system of priorities, and hence the efficiency and effectiveness of forensic examinations can be increased. Nevertheless, the lack of concrete methods limits efforts to implement triage. This paper presents a practical approach that is designed to build a prioritizing solution. In this work a new process model is derived based on the presented approach, and it is particularly suited to scenarios where forensic examiners do not have enough time and resources to conduct a full examination and analysis. An example is described to demonstrate how this approach can be used to meet the requirements of network forensic investigations.
Evaluating the effectiveness of eco-driving courses based on car-GPS tracking data in the itinerary tracking device to reduce fuel consumption of vehicles in urban areas

According to the current issue of resource shortage, the reduction of fuel consumption or using alternative energies which has an environmentally friendly effect is the priority of governments in many countries. Besides, many studies mentioned that driver behaviors play an essential role to reduce fuel use and decrease vehicle exhaust emissions. On the other hand, the carGPS tracking data in itinerary monitoring equipment is typically using in navigation, positioning, and vehicle management. Thus, this study aims to analyze the correlation between driver behaviors and fuel consumption based on the velocity, acceleration, fuel sensors data collected from car-GPS trackers device in association with Geographic Information System (GIS) to find out the solution to evaluate the effectiveness of ecodriving courses as well as assess the usability of using car-GPS tracking data from the GPS tracking device to analyze and adjust driver behavior in urban areas to save energy and protect the urban environment
Genetic Enhancement of Soybean Oil for Industrial Uses: Prospects and Challenges

More than 600 million pounds of the soybean oil pro-duced annually in the United States are used for nonedi-ble applications, including the production of industrialmaterials (American Soybean Association, 2001). Morethan half of this use of soybean oil falls in the categoryof fatty acids, soaps, and feed. The remainder of thenonedible soybean market is used for the manufactureof inks, paints, varnishes, resins, plastics, and biodiesel.Although the use of soybean oil for industrial purposesis economically significant, it represents only 4% of thetotal consumption of US soybean oil. By contrast, morethan 13 billion pounds of US soybean oil are used annu-ally in foods and food processing. (For more informa-tion, see SoyStats 2001 at http://www.unitedsoybean.org/soystats2001.)
Discomfort glare for white LED light sources with different spatial arrangements

Quantitative relations between discomfort glare evaluation and photometric quantities such as illuminance at the observer’s eye, average luminance of the source area, average luminance of the effective area and effective glare luminance for white LED sources having a variety of spatial luminance distributions have been investigated. Effective glare luminance, which is the sum of luminances in the luminaire area divided by the effective area, explains the scaling results of all sources in the same way. In addition, a new equation modified from the Commission Internationale de l'Éclairage Unified Glare Rating formula using the effective glare luminance showed a strong correlation with the scaling results. It is thus suggested that effective glare luminance is a useful index of discomfort glare for light sources having different spatial luminance distributions.
Optimum Arrangement of Photovoltaic Systems in Housing at Khartoum: Application of Renewable Energy in Urban Design

This paper searches to find out of building integrated photovoltaic system designs in Khartoum. It discussed technical issues and designed an integrated of photovoltaic in domestic using, within an urban approach towards sustainability in energy. Photovoltaic systems can be used to develop the solar energy in almost all kinds of applications. Exploiting of solar energy for domestic use is one avenue where the energy produced from the sun is converted into electricity to power most if not all the appliances available at our homes and residences. Building a photovoltaic system is the process of designing, selecting, and calculating the ratings of the equipments employed in the system. This process depends on a range of factors such as geographical location, solar irradiation, and load requirements. I introduce the procedures utilize, in building and selecting the equipments of a grid-connected photovoltaic system based on the Watt-hour demand of 3.8 kw. As a case study, a residence in Khartoum with low-energy consumption is selected.
High temperature characterization of PZT(0.52/0.48) thin-film pressure sensors

This paper reports the characterization and real-time testing of thin-film Pb(Zr0.52Ti0.48) (PZT) micro diaphragm pressure sensor at high temperature (up to 390 °C) and high pressure (up to 105 kPa) conditions. Firstly, the influence of thermal stress on micro diaphragm deformation is investigated theoretically and experimentally. Secondly, the effect of rhombohedral–tetragonal, tetragonal–cubic phase transitions and lattice parameter changes of the PZT composite on the resonance frequency are studied. Thirdly, a good performance of the proposed sensor at low-frequency oscillatory flow generated by a vibrating sphere source (frequency of 35 Hz) in silicone oil bath at different temperatures is reported. The observations lead to the conclusion that despite the fluctuations on resonant frequency with increasing temperature, the proposed PZT sensor can be effectively used in high temperature/pressure applications.
Power-Loop-Free Virtual DC Machine Control With Differential Compensation

Conventional virtual dc machine (VDCM) control incorporates the mechanical characteristics of dc machines to emulate necessary system inertia. Utilizing already-existing proportional-integral control loops in the conventional VDCM control, this article eliminates the requirement of calculating torques using power measurements, i.e., power-loop-free VDCM, which greatly simplifies the conventional VDCM and reduces required resources for implementation. Theoretical analysis of the proposed power-loop-free VDCM shows that the controlled steady-state and dynamic characteristics are not aligned and sometimes even conflicting. This work further incorporates a differential compensation in the proposed power-loop-free VDCM to enhance the dynamic performance without affecting its steady-state characteristics. The proposed power-loop-free VDCM control is validated by both numerical simulations and hardware-in-the-loop experiments, and the results of both validations are consistent with the theoretical analysis, which justifies the effectiveness of the proposed VDCM control.
Sampling, data transmission, and the Nyquist rate

The sampling theorem for bandlimited signals of finite energy can be interpreted in two ways, associated with the names of Nyquist and Shannon. 1) Every signal of finite energy and bandwidth W Hz may be completely recovered, in a simple way, from a knowledge of its samples taken at the rate of 2W per second (Nyquist rate). Moreover, the recovery is stable, in the sense that a small error in reading sample values produces only a correspondingly small error in the recovered signal. 2) Every square-summable sequence of numbers may be transmitted at the rate of 2W per second over an ideal channel of bandwidth W Hz, by being represented as the samples of an easily constructed band-limited signal of finite energy. The practical importance of these results, together with the restrictions implicit in the sampling theorem, make it natural to ask whether the above rates cannot be improved, by passing to differently chosen sampling instants, or to bandpass or multiband (rather than bandlimited) signals, or to more elaborate computations. In this paper we draw a distinction between reconstructing a signal from its samples, and doing so in a stable way, and we argue that only stable sampling is meaningful in practice. We then prove that: 1) stable sampling cannot be performed at a rate lower than the Nyquist, 2) data cannot be transmitted as samples at a rate higher than the Nyquist, regardless of the location of sampling instants, the nature of the set of frequencies which the signals occupy, or the method of construction. These conclusions apply not merely to finite-energy, but also to bounded, signals.
Modeling and simulation of heterogeneous electronic system based on smart sensors for aerospace structures health monitoring

This paper presents a top-down design methodology for a behavioral modeling System, based on smart sensors for aerospace structures monitoring, implemented on a MATLAB/Simulink environment. The modeled acquisition platform in this aeronautic health monitoring systems (AHMS) is built using the following specific sensors: humidity, pressure, temperature, stress and acceleration. For this application it has been implemented frequency acquisition techniques ensuring optimum noise immunity, particularly: a signal acquisition technique based on voltage to frequency converter, capacitance to frequency and frequency to code converters (VtoF-cC, CtoF-cC). The Simulink model presents a high accuracy level in signal acquisition and conditioning compared to the electrical system simulation behavior.
The Impact of Leachate Recirculation On Municipal Solid Waste Landfill Operating Characteristics

Landfill bioreactor technology offers important advantages in the management and treatment of municipal solid waste, including accelerated waste stabilization rates, enhanced gas production, facilitated leachate management, volume reduction and minimized long-term liability. These advantages have been documented in laboratory-, pilot- and full-scale investigations. Although challenges remain in implementing the technology, bioreactor landfills are designed and operated with increasing frequency. © 1996 ISWA
The World Junior Short Track Speed Skating Championships 2018 in Tomaszów Mazowiecki: A sports geography perspective

The sports event sector has increased over the past decades, becoming a profitable part of the leisure and tourism industry. While there is no shortage of knowledge surrounding the legacies of large-scale sports events, little is known about the smaller competitions. The authors seek to fill this gap by establishing a profile of the spectators attending the 2018 World Junior Short Track Speed Skating Championships, hosted in Tomaszów Mazowiecki (Poland). The results were gathered from 349 intercept survey questionnaires. Over half of the respondents were from the host city or the region. The majority were women. The event attractiveness, uniqueness and novelty, including the venue were the main reasons for attendance. The respondents' willingness to attend a similar event in the future was another key finding. The conclusion and recommendations focus on the need for further research into the motives of those attending small-scale indoor, international age-group winter sports events.
PkM-Peningkatan Kompetensi Guru SMK Mega Link Majene dalam Menggunakan Aplikasi Quizizz sebagai Media Assessment Pembelajaran

SMK Mega Link Majene memiliki 16 guru yang terdiri dari guru normative, adaptif, dan produktif, sehingga keberagaman jenis guru sangat memungkinkan sekolah hanya menggunakan satu aplikasi digital untuk melakukan assessment pembelajaran. Tujuan kegiatan PkM dosen yang dilakukan terhadap mitra SMK Mega Link Majene adalah meningkatkan kompetensi Guru dalam menggunakan aplikasi quizizz sebagai media assessment pembelajaran. Metode yang digunakan dalam PkM ini adalah pelatihan dan pendampingan. Tahap pelaksanaan PkM meliputi (1) koordinasi dan analisis kebutuhan usulan, (2) menyusun dan melakukan validasi buku petunjuk penggunaan aplikasi quizizz, (3) pelatihan penggunaan aplikasi quizizz, (4) Pendampingan di kelas dengan menggunakan aplikasi quizizz, (5) Evaluasi dan (6) pelaporan pelaksanaan kegiatan. Berdasarkan hasil analisis data pelaksanaan PkM diperoleh: (1) aplikasi quizizz sangat mudah digunakan oleh guru di kelas maupun di luar kelas, (2) Aplikasi quizizz membantu guru menyususn soal atau tugas untuk mengevaluasi pemahaman siswa terhadap materi yang telah diajarkan, (3) siswa tidak dapat saling menyontek, karena soal yang ditampilkan pada quizizz diacak, (4) membantu guru dalam menganalisis hasil belajar siswa, karena quiziz memberikan data dan statistik tentang hasil pekerjaan siswa secara langsung, dan (5) memudahkan guru dalam memberikan PR.
BROADBAND ASYMMETRICALLY FED CIRCULARLY POLARIZED SLOT ANTENNA FOR MID-BAND 5G SMARTPHONE APPLICATIONS

A compact asymmetrically fed U shape slot antenna for 5G smartphone application is presented. The antenna consists of two major components that are responsible for generating broadband circular polarization (CP) (i) the microstrip patch feed structure employed at the top plane and (ii) U shape slot mechanism employed at the ground plane. The U shape ground radiator is approximately half wavelength slot mode which is responsible for lower band CP operation. The planar monopole structure is formed by the microstrip line feed. This planar monopole is a quarter wavelength mode used for achieving higher band CP operation. By combining these two CP modes generated by U shape slot and port-line structure, a broadband CP antenna is designed. The circular polarization is achieved with lesser complexity in the design structure. To get the practical validation of the simulated design, it is then fabricated and tested for measured results without using power divider. The measured axial ratio bandwidth covers from 2.00GHz to 6.50GHz (4.50GHz), and the −10 dB Impedance Bandwidth (IBW) covers from 1.66GHz to 8.10GHz (6.44GHz) respectively. The isolation between two asymmetric port-lines is greater than 14.5 dB within 3-dB axial ratio bandwidth.
Remagnetization of the Jurassic limestones in the Zaduo area, Eastern Qiangtang Terrane (Tibetan Plateau, China): Implications for the India-Eurasia collision

A series of terranes were accreted to Eurasia in the region of what is now the Tibetan Plateau, including the Qaidam-Qilian, the Songpan-Ganzi, the Qiangtang, the Lhasa and the Tethyan Himalaya terranes. The drift history of the Qiangtang Terrane and the timing of the Lhasa-Qiangtang collision is controversial. To contribute to this topic, here, we paleomagnetically investigate the Middle-Upper Jurassic limestones of the Yanshiping group in the Zaduo area (32.5° N, 95.2° E), in the eastern Qiangtang Terrane. Twelve sites (133 samples) were processed. A major challenge in paleomagnetism is the possibility of remagnetization that interferes with paleogeographic reconstructions. Both thermal and alternating field demagnetizations were carried out to isolate the characteristic remanent magnetization (ChRM). Despite the positive reversals test, rock magnetic information points to a remagnetized ChRM. The ChRM is residing in stable single-domain (SSD) magnetite grains with cogenetic superparamagnetic (SP) particles. The co-occurreance of SSD and SP magnetites generate distinct rock-magnetic properties often referred to as the ‘remagnetized fingerprint’ in limestones. This remagnetization process is also manifested by the widespread occurrence of gypsum veinlets in the limestones. The site-mean direction of the 12 sites after tilt-correction is Ds = 30.6°, Is = 35.6°, κs = 182.9, α95 = 3.2°, corresponding to a paleolatitude of ∼19.7°± 2.8° N for the study area. The corresponding paleopole (59.8° N, 202.7° E with A95 = 2.8°) points to an NRM acquired after the India-Eurasia collision. The original sediments were likely anoxic because of the high organic carbon fluxes that prevailed during their deposition. After the India-Eurasia collision, it is envisaged that conditions became more oxic, giving rise to oxidation of iron sulphides to authigenic magnetite and the CRM acquisition. The Zaduo area in the Eastern Qiangtang Terrane has experienced ∼15.7° ± 3.2° (∼1740 ± 350 km) of latitudinal crustal shortening since the Eocene. In addition, the clockwise rotation responding to the India-Eurasia collision is also detected in the Zaduo area.