Miracle-dz/UniFAR-FTUs huggingface dataset:
Quantification and elimination of the CCD dark current in weak spectrum measurement by modulation and correlation method

In weak spectrum measurement, the dark current of CCD could be very large and thus affect the proper application. It's essential to suppress the dark current and other noises to get high quality spectral data. In this paper we proposed a modulation and correlation method to eliminate it for weak spectrum measurement. In this design, only a compact camera shutter is to be mounted on the spectrometer, which will facilitate the independent control of CCD integral-time and light passing or blocking status. To measure the weak spectrum, the shutter is modulated by a pseudorandom binary sequence under fixed CCD integral-time, and the correlation processing is performed on the captured spectra to produce high quality spectrum, where dark current will be totally eliminated and random noises be suppressed. The system setup and the brief analysis of this method are introduced. Computer simulation and preliminary weak spectrum measurement results are also provided in this paper.
Security Aspects for Rpl-Based Protocols: A Systematic Review in IoT

The Internet of things (IoT) is a concept that has gained traction over the last decade. IoT networks have evolved around the wireless sensor network (WSN), and the following research looks at relevant IoT concepts and the different security issues that occur specifically at the network layer. This analysis is performed using a structured literature review (SLR). This form of bibliographic review has been a trend in recent years. Its strength is the performance of a bibliometric analysis that allows studying both trends in the line of research that you want to address and the relevant authors. This SLR reviews 53 proposals between 2011 and 2020, whose contribution is to mitigate attacks in the RPL (Routing Protocol for Low-Power and Lossy Networks) protocol. The revised proposals emerged after selecting keywords and databases in which to apply the search. Initially, approximately 380 research works appeared, for which it was necessary to continue using filters to refine the proposals to be included. After reading titles and abstracts, 53 papers were finally selected. In addition to analyzing the attacks mitigated in the RPL protocol, it is intended to identify the trend by which these attacks are reduced, as a result of the review, nine attacks have been found: rank, blackhole, selective forwarding, wormhole, DODAG (Destination-Oriented Directed Acyclic Graph) version number, DAO (Destination Advertisement Object) inconsistency, DIO (DODAG Information Object) suppression, Sybil, and sinkhole. Each of the 53 proposals analyzed in this review has an associated mitigation strategy, these strategies have been categorized into four groups, based on authentication or cryptography, based on network monitoring, based on secure parent node selection and other. According to the results, the authors’ primary mitigation strategy is based on network monitoring, with 30%. This review also identifies the principal authors and countries that need the development of this line of research.
Assessment testing Mizen Head Footbridge, Ireland

Mizen Head Footbridge in County Cork, Ireland, is a reinforced concrete through-arch structure spanning 50 m. The structure is 95 years old and exhibits typical reinforced concrete defects of spalled concrete, cracking and staining from reinforcement corrosion. An inspection, geometrical survey and a series of material tests were carried out as part of an assessment of the bridge. Petrographic examination of samples removed from the structure gave confidence in the quality of the concrete in the structure. Determination of carbonation and chloride levels in the concrete identified future repair strategies for the structure.
A Prototype Target Tracking Network System for Robot Feedback Control

In this paper, a real-time location feedback control system based on multi-sensor network is proposed for the precise control of a moving robot. The target tracking network system is a real test-bed that consists of a group of ultrasonic sensor nodes, a mobile robot and two laptops. In order to pursue excellent tracking performance and modify the robot’s trajectory promptly, Extended Kalman Filtering algorithm as well as a kind of scheduling scheme based on location is applied in the system. The experiment result validates the correctness of the Extended Kalman Filter (EKF) and shows that the target tracking network system is effective for robot feedback control.
Torque Optimization of Double-Stator Switched Reluctance Machine

Double-stator switched reluctance machines benefit from a high torque density and a low radial force level in comparison with conventional switched reluctance machines resulting in a lower vibration and acoustic noise. Therefore, they are suitable candidate for automotive applications. However, torque pulsation which is also a source for vibration is still remained and should be alleviate by dimension optimization of the machine. This paper presents a design optimization of a double-stator switched reluctance machine for improving the magnetic torque quality of the machine. For this purpose finite element method along with response surface methodology is used to optimize three parameters of the machine to maximize torque quality factor i.e. the average torque to torque ripple ratio in the machine. Genetic algorithm method is also employed as an optimization tool. The aim of optimization is to maximize the ratio of average torque to torque ripple. Finite element results are presented to verify the optimization method.
Results of the world's fair hearing tests

A hearing test for musical tones formed part of the Bell System exhibit at the New York and San Francisco Fairs, and the test records obtained have made possible a study of the hearing of a large group of the United States population. The variation of hearing acuity with age and sex is described in considerable detail. Hearing is also related in lesser degree to other factors, such as place of residence, economic status, and race, and these relations are discussed.
Using data from simulation training in modelling emergency response outcome

Simulations fulfilling the UKOOA requirements to train and validate competence in emergency management for the offshore industry may provide organisations with valuable information. This paper describes a methodology to plan simulations for data capture. Following this, the task performance resource constraint model is used to integrate the information provided by simulation and other research studies. Then the human response data within the simulation can be categorised for further use. This paper presents the scope of human response data that can be obtained and the means of categorising them. This is based on cumulative results from 5 offshore scenarios and 9 onshore scenarios. (6 pages)
ASSESSMENT OF DECOMPOSED FALSE YAM (ICACINA OLIVIFORMIS) TUBER AS PLANT GROWTH MEDIUM

The study was carried out in attempt to use false yam tuber as soil amendment for plant growth. False yam tubers were harvested, processed into smaller pieces and decomposed for six different weeks (2, 4, 6, 8, 10 and 12 weeks). Decomposed false yam tubers from the various treatments were mixed with top soil in the ratio 1:1, 1:2 and 2:1 (false yam: sand ratio) with soil as control. Maize seed was used as test crop with germination percentage, plant height, number of leaves, plant girth and leaf area index as growth parameters. The study revealed that decomposed false yam tuber has better physical capacity to support seed germination when added to soil. Results indicated that treatment 1:2 had the highest plant height, number of leaves and plant girth followed by the control, treatment 1:1 and then treatment 2:1 at week 10 and 12 of false yam decomposition. Also treatment 1:2 had the highest leaf area index followed by treatment 1:1, control and then treatment 2:1 at week 12 of false yam decomposition. The study revealed that decomposed false yam tuber has the ability to support plant growth and development when added to soil in a ratio of 1:2.When the quantity of decomposed false yam becomes higher than the soil,or sand the media become injurious to plant growth and development and may be due to too much moisture absorption leading to anaerobic condition in the medium. Further decomposition of the false yam tuber into compose may establish its usefulness as plant growth media .
Cross‐polarization performance of the hologram compact antenna test range

To overcome the problem of the very tight surface accuracy requirement set on a reflector, a planar hologram structure is proposed to be used as the collimating element in a compact antenna test range (CATR). In this paper, the cross-polarization performance of the hologram used in a CATR is studied. A numerical method for predicting cross-polarization levels is presented, and the theoretical results are compared with the measured ones at 39 and 310 GHz. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 225–229, 2000.
Desafios para a avaliação toxicológica de agrotóxicos no Brasil: desregulação endócrina e imunotoxicidade

Intense usage of pesticides in Brazil poses a risk concerning arising of various and hazardously toxic effects such as towards to immunological and endocrine systems. Assays recommended by national and international guidelines possess limitations to perform a complete predictive evaluation of the broad spectrum of molecules and target-organs by pesticides with those properties. On the other hand interactions among immunological, endocrine and nervous systems difficult investigation of those hazards that may impact reproduction, metabolic processes, host resistance to pathogens and tumoral cells. Similar to drugs, a periodic licensing review of pesticides in Brazil must be adopted in urgent character in order to identify and ban de usage of health extremely hazardous pesticides. Although prescribed in law, licensing review demanded by health and environmental agencies is oftenly judicialized, preventing or delaying conclusion in several years. It is also upon demand a governmental policy regarding a transition from the current production model tied to agrobusiness to a production of agroecological basis.
Theory and design of high-index-contrast microphotonic circuits

Advanced microphotonic device designs in strongly confining silicon and silicon nitride waveguides, novel photonic device concepts, and the first experimental demonstrations of these structures are described. They show a progression of new optical signal processing capabilities that enable chip-scale microphotonic routers for high bandwidth and fine granularity optical wavelength routing networks. Rigorous theoretical models are developed that enable the design of efficient high-index-contrast (HIC) microphotonic components and set theoretical bounds for their capabilities. They take into account new, coupling induced resonance-frequency shifting and parasitic loss effects. Based on microring resonators and HIC silicon and silicon nitride waveguides, the first telecom-grade microphotonic channel add-drop filters are demonstrated, including novel, dispersion-free switchable and widely tunable designs. Several new classes of optical devices are proposed. The first, universally balanced interferometers, enable filters capable of “fully transparent” tuning and increased accessible wavelength range, facilitate a novel proposed photonic-circuit “hot-swapping” functionality, and approximate an optical nearinverse operator in a general way. The second, loop-coupled resonators, enable optimally sharp filters and flat-top, dispersionless light-slowing structures that are not limited by the Kramers-Kronig amplitude-dispersion tradeoff. A third class provides a general approach to disabling both the amplitude and phase response of resonant systems to achieve a fulltransparency off state. They allow a robust integrated solution to hitless, errorless filter tuning and wavelength-reach expansion in filters, topical problems of considerable technological importance. Taken together these developments permit a complete tunable/reconfigurable optical add-drop multiplexer (T/R-OADM) to be constructed on a silicon chip, with performance well beyond that of current technology. Such a demonstration device was designed and fabricated. This work also provides new general building blocks for microphotonic circuits, and design guidelines for strong confinement photonics. Thesis Supervisor: Erich P. Ippen Title: Elihu Thomson Professor of Electrical Engineering Professor of Physics Thesis Supervisor: Franz X. Kärtner Title: Professor of Electrical Engineering
Dual-mode stepped-impedance ring resonator for bandpass filter applications

It is well known that two orthogonal resonant modes exist within a one-wavelength ring resonator. In this paper, we focus on a ring resonator possessing an impedance step as a form of perturbation. A convenient analyzing method for obtaining the resonance characteristics of this resonator structure is presented. Furthermore, generation of attenuation poles obtained by the dual-mode ring resonator is discussed. In addition, a filter design method based on this resonator is explained, followed by experimental results, which prove the validity of the proposed design method.
Performance enhancement of the task assessment process through the application of an electronic performance support system

Higher education in Australia, as for many other countries, has changed greatly over the last 20 years at all levels and in many areas of operation including teaching, learning and assessment. The driving forces for these changes have been both internal and external, and have included factors such as: the increasing student population; the increasing use of part-time staff; a reduction in government funding; an increased expectation of institutional accountability; and the growing access and use of information and communication technologies (ICT) in teaching and learning. Assessment has not escaped these changes but in many cases has not kept up with exemplary and recommended practice. This is especially so in the specific area of task assessment that involves professional judgement, where assessment is a timeconsuming, expensive, poorly managed, and a stressful professional activity, and is often a negative emotional experience for both learners and educators. Professional judgement of educators in the task assessment process is becoming more important with the trend towards student-centred, standards-based curriculum and the use of authentic assessment tasks that are more subjective in nature. At the same time, stakeholders are demanding greater validity, reliability and transparency in the assessment process. To meet these demands, a new re-framing of the task assessment process is required, involving activities such as the design of the marking key, moderation, marking, feedback, reporting and management. Meanwhile, current methods and practices used in the task assessment process that involve professional judgement have not kept pace with current best practice, nor do they involve the application of ICT to any great extent. The study partly developed from the researcher’s professional reflection on the above issues. The study also developed from the researcher’s observation of the importance that electronic performance support systems (EPSS) and knowledge management (KM) have had in the commercial world in the area of improved performance of the worker and work processes. The premise of the study was to investigate to what extent the performance of the task assessment process involving professional judgement could be improved and enhanced through the application of an EPSS. A preliminary review of the literature identified three fields that needed to be reviewed, investigated and integrated for this study; these were: assessment of achievement, the use of EPSS, and software design and development.
Identifying and Managing Project Risk: Essential Tools for Failure-Proofing Your Project

There's a good reason project risk management is one of the most vital of the nine content areas of the Project Management Body of Knowledge (TM). Important projects tend to be time constrained, pose huge technical challenges, and suffer from a lack of adequate resources. It's no wonder that project managers are increasingly focusing their attention on risk identification. Identifying and Managing Project Risk is a practical guide to minimizing the possibility of failure in critical projects. The book takes readers step by step through every phase of a project, showing them how to consider the possible risks involved at every point in the process. Relevant figures and diagrams support the text and illustrate key scenarios. At the end of each chapter is an analysis of how the principles just discussed applied to a supreme example of what many once considered a truly impossible project: the building of the Panama Canal.Packed with real-world information, this book is essential reading for any project manager seeking to complete projects smoothly and successfully
Durchbrechungen des Kongruenzprinzips und Residualgewinne Broken Link Between Accounting and Finance

Ziel des vorliegenden Beitrags ist es, die Auswirkungen von Kongruenzdurchbrechungen auf die Bewertung, Vorteilhaftigkeitsprufung und Performance-Messung mit buchwertbasierten Residualgewinnen zu bestimmen. Wir wahlen dazu folgendes Vorgehen: Kapitel II stellt die Wirkungsweise des Kongruenzprinzips zur Erzielung von Barwertkompatibilitat buchwertbasierter Residualgewinne vor. Kapitel III definiert Kongruenzdurchbrechungen bzw. dirty surplus accounting und beschreibt deren Auftreten in den gangigen Rechnungslegungssystemen. Kapitel IV stellt den Kern der Untersuchung dar und zeigt zunachst anhand von Fallbeispielen die aus Kongruenzdurchbrechungen resultierenden Verzerrungen. Diese werden schlieslich formalisiert und Ansatze zu deren Korrektur vorgeschlagen. Kapitel V geht der Frage nach, ob dirty surplus accounting den "link between accounting and finance" bruchig werden last. Wir werden sehen, das Kongruenzdurchbrechungen fur die empirische Anwendung von Residualgewinnen weit weniger Gefahren bergen, als man zunachst anzunehmen geneigt ist. Kapitel VI fast zusammen. It is the goal of the paper to determine the impacts of dirty surplus accounting on valuation, net present value calculation, and performance measurement with residual incomes based on book values. The proceeding is as follows: Chapter II introduces the mechanics of the clean surplus relation to assure valuations with residual incomes that are equivalent to those with cash flows. Chapter III defines violations of the clean surplus principle, or dirty surplus accounting respectively, and describes its occurrence in various accounting systems. Chapter IV contains the quintessence of the analysis and identifies on the basis of examples the distortions resulting from dirty surplus accounting. Chapter V goes into the matter if dirty surplus accounting breaks the link between accounting and finance. We will see that violations of the clean surplus relation hold far less pitfalls for empirical applications than previously assumed. Chapter VI concludes.
Ultra low power low noise amplifiers for wireless communications

The authors present the design and performance results of surface mount plastic packaged, ultra low power, GaAs monolithic low noise amplifiers, for cordless phone receivers at 1.9 GHz and spread spectrum receivers at 2.4 GHz. The results for the 1.9 GHz amplifier show a small-signal gain of 14.5 dB and noise figure of 1.5 dB with a 4 V supply while drawing only 3 mA. The LNA was also tested with a 3 V supply and with a current of 2 mA the measured gain and noise figure were 13.5 dB and 1.75 dB, respectively. Thus the LNA is compatible with the voltage requirements of the latest generation of 3 V CMOS logic circuits. The results for the 2.4 GHz LNA show a small-signal gain of 15 dB and a noise figure 1.8 dB drawing less than 5 mA from a single +5 volt supply. The LNAs are now being produced in volume in surface mount plastic packages for custom wireless communications applications. <<ETX>>
Direct power control of PWM converter without power source voltage sensors

This paper proposes a novel control strategy of a PWM converter with no power source voltage sensors. The strategy has two features to improve a total power factor including harmonic components without detecting the voltages. One is an estimation technique of the power source voltages, which can estimate instantaneous values of the voltages by evaluating instantaneous active and reactive power according to every switching mode of the converter. The other is a direct instantaneous power control technique, which can directly control the instantaneous active and reactive power by using switching modes as manipulated values for the converter. A DSP based experimental system was developed, and experimental tests were conducted. The control period of the system was only 15 /spl mu/s. It was confirmed that the maximum total power factor was more than 99%, and the maximum efficiency was 96.2%. The results have proven excellent performance of the proposed system.
Route Planning of Unmanned Aerial Vehicles under Recharging and Mission Time Constraints

This paper investigates the problem of route planning for rechargeable unmanned aerial vehicles (UAV) under the mission time constraint in cases where more than one trip per round is required due to limited battery capacities. The goal is to determine the number of UAVs to be deployed and the flying paths that minimize the total mission cost. Unlike previous works, the electric cost incurred by UAV recharging proportional to actual flying distances is incorporated into our model. The problem is formulated as a mixed-integer programming model to minimize the sum of electric charging cost, the UAV usage cost, and the penalty cost from the violation of the mission time constraint. Extensive numerical experiments are conducted to examine the integrity and performance of the proposed model under various model parameters and deployment scenarios in grid areas and a real terrain area. The optimal solutions can be obtained for small-scale problem instances in a reasonable runtime. For large-scale problems, only feasible solutions can be obtained due to limited computational resources.
Compact circularly polarized asymmetric‐slotted microstrip patch antennas

A technique is demonstrated to generate circularly polarized (CP) radiation of the compact diagonally asymmetric‐slotted microstrip patch antennas. Design rules for the single‐feed, compact, circularly polarized microstrip antennas (CPMA) with any arbitrary‐shaped slots along the diagonal directions are first summarized. Four, compact, CPMA with circular‐, square‐, cross‐, and square‐ring‐shaped slots along the diagonal directions are proposed and compared based on a fixed overall antenna size. A compact, CP, cross‐shaped slotted, microstrip antenna is fabricated and measured to verify the proposed technique experimentally. The measured 3‐dB axial‐ratio bandwidth of about 6.0 MHz is achieved with 10‐dB return loss bandwidth of 19.0 MHz while measured gain of the antenna is 4.0 dBic at 930 MHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1920–1927, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26959