Miracle-dz/UniFAR-FTUs huggingface dataset:
Fen Konularına Yönelik Web Sayfası Hazırlama Öğretmen Adaylarının Bilgisayar Teknolojisini Kullanabilme Becerilerini Nasıl Etkiler

Bu calisma, Fen konularina yonelik web sayfasi hazirlamanin ogretmen adaylarinin bilgisayar teknolojisini kullanabilme becerilerine nasil bir etkisinin oldugunu belirlemek amaciyla yapilmistir. Arastirma, 20062007 guz donemi Artvin Coruh Universitesi Egitim Fakultesi Ilkogretim Bolumu Sinif Ogretmenligi Anabilim Dalinda ogrenim goren 25 ucuncu sinif ogrencisi ile yurutulmustur. Nitel arastirma yonteminin kullanildigi bu arastirma dort asamada tamamlanmistir: Ilk asamada, adaylara web tasarimi yapabilmeleri icin gerekli program ve birtakim kodlamalar anlatilmistir. Ikinci asamada, adaylara Ilkogretim 5. sinif Fen Bilgisi Ogretim Programinda bulunan konularin kazanimlarina uygun web sayfalari hazirlamalari istenmistir. Ucuncu asamada, adaylardan hazirlamis olduklari web sayfalarini sinif ortaminda sunmalari istenmistir. Son asamada, adaylara web sayfasi hazirlamalarinin teknolojiyi kullanabilme becerilerini nasil etkiledigini belirlemek icin yari yapilandirilmis mulakat uygulanmistir. Sonuc olarak ogretmen adaylarinin; web sayfasi hazirlayabilme, arama motorlarini kullanarak bilgiye ulasabilme, uygulama programlarini etkili kullanabilme, web sayfalarinda kullanilan teknolojilere elestirel bakabilme becerileri kazandiklari belirlenmistir.
Total productive maintenance (TPM) implementation practice

Purpose – The purpose of this paper is to review the literature on total productive maintenance (TPM) implementation practice to present an overview of TPM implementation practices adopted by various manufacturing organizations and suggest possible gaps from researchers and practitioner’s point of view. This study tries to identify the best strategy for improving competitiveness of small and medium enterprises (SMEs) in globalized market and evaluates TPM implementation practice in SMEs. Design/methodology/approach – The objective of this paper is to study the role of TPM program in context of Indian industries either from SMEs to large-scale industries. The approach has been directed toward justification of TPM implementation practice for its support to competitive manufacturing in the context of Indian manufacturing industries. Findings – TPM implementation improves productivity and working efficiency of employees and also improves equipment effectiveness and a positive inclination toward company is reg.
Exploring the Beginnings of Algebraic K-Theory

According to Atiyah, K-theory is that part of linear algebra that studies additive or abelian properties (e.g. the determinant). Because linear algebra, and its extensions to linear analysis, is ubiquitous in mathematics, K-theory has turned out to be useful and relevant in most branches of mathematics. Let R be a ring. One defines K0(R) as the free abelian group whose basis are the finitely generated projective R-modules with the added relation P ⊕ Q = P + Q. The purpose of this thesis is to study simple settings of the K-theory for rings and to provide a sequence of examples of rings where the associated K-groups K0(R) get progressively more complicated. We start with R being a field or a principle ideal domain and end with R being a polynomial ring on two variables over a non-commutative division ring.
Hybrid full-bridge and LLC converter with wide ZVS range and less output inductance

This study presents a new hybrid full-bridge and LLC converter with the features of low circulating current loss, wide zero voltage switching range and less output inductance for industry power units. The proposed hybrid circuit has two full-bridge converters and one LLC converter with shared lagging-leg switches. Two full-bridge converters, shared the same lagging-leg switches, are operated at phase-shift pulse-width modulation to regulate the output voltage and share the load power. Half-bridge LLC converter is added at the lagging-leg switches to extend the zero voltage switching range of lagging-leg switches from zero to full load. The output voltage of LLC converter is connected to the secondary sides of two full-bridge converters during the freewheeling interval to eliminate the circulating current loss. The rectified voltage of full-bridge converter during the freewheeling stage is positive instead of zero so that the output filter inductance can be reduced. Finally, experiments with a 1440 W prototype circuit converting 380 V input to an output voltage 24 V/60 A are provided to verify the theoretical analysis and effectiveness of the proposed converter.
Dynamic Surface Temperature Measurements in ICs High-sensitivity, high-resolution thermal mapping of integrated circuits can be provided by techniques such as scanning with laser beams and embedding of CMOS temperature sensors.

Measuring techniques of the die surface temper- ature in integrated circuits are reported as very appropriate for failure analysis, for thermal characterization, and for testing modern devices. The paper is arranged as a survey of tech- niques oriented towards measuring the temperature dynamics of the circuit surface and presenting and discussing both the merits and drawbacks of each technique with regard to the accuracy, reliability and efficiency of the measurements. Two methods are presented in detail: laser probing methods, based on interferometry and thermoreflectance, and embedded CMOS circuit sensors. For these techniques, the physical prin- ciples, the state of the art in figures of merit and some application examples are presented.
Reenvisioning Postpandemic Youth Sport to Meet Young People’s Mental, Emotional, and Social Needs

ABSTRACT Before 2020, young people were experiencing significant psychosocial challenges, with the COVID-19 pandemic and related events (e.g., lockdowns, social isolation, and economic disruption) amplifying concerns about their well-being. Youth sport is a context for promoting mental, emotional, and social health, and yet it is not achieving its full potential in the United States. The purpose of this expert commentary, composed by the 2020–2021 President’s Council on Sports, Fitness & Nutrition Science Board, is to present a vision of youth sport in the United States that prioritizes young people’s mental, emotional, and social health. The extraordinary events of 2020 and 2021 provide an opportunity to reenvision our approach to youth sport as pandemic-related restrictions are lifted. Ten recommendations from this vision are presented in this article, along with 10 innovative, actionable takeaways; each of these offer meaningful benefits to young people’s mental, emotional, and social health.
ESO based anti-disturbance target tracking control for twin-screw unmanned surface vehicle

: ［ Objectives ］ Focusing on the model uncertainties of unmanned surface vehicles (USVs) and unknown marine environmental disturbances, an anti-disturbance target-tracking control algorithm, based on extended state observer (ESO), is proposed for twin-screw unmanned surface vehicles. ［ Methods ］ At the kinematic level, a guidance law based on the principle of constant bearing is presented for USVs. At the kinetic level, aiming at model uncertainties and unknown disturbances, surge velocity and yaw angular velocity anti-disturbance control laws based on ESOs are designed to eliminate the problems caused by model uncertainties and unknown marine environmental disturbances. Finally, the proposed controllers' stabilities are analyzed via in-put-to-state stability and cascade theory. ［ Results ］ The results show that such a USV can effectively track the virtual target point using the proposed anti-disturbance target tracking controller. ［ Conclusions ］ The effectiveness of the proposed control algorithm is verified via experimental results.
Evaluation of land subsidence in Kashmar-Bardaskan plain, NE Iran

The development of agriculture and industry and the increase of population in countries with arid to semi-arid climates have led to more harvesting of groundwater resources and as a result land subsidence in different parts of the worlds. Decades of groundwater overexploitation in the Kashmar-Bardaskan plain in the north-east of Iran has resulted substantial land subsidence in this plain. The plain is considered as an arid to semi-arid zone and facing a negative water balance. The average annual precipitation in the plain is around 191 mm and the evaporation rate is 3956 mm. According to the unit hydrograph of the plain, the annual decline of water level is 1.12 m. In this study, the velocity of subsidence has been determined using Interferometric SAR technique (In-SAR) and radar images of Envisat ASAR and Sentinel-1 for a time period from 2003 to 2017. The results of an InSAR time series analysis indicated that an area of 1200 km2 with different speeds of 5 to 26 cm/year in the satellite line of sight (LOS) is subsiding. The results showed that in addition to the decline of groundwater level, subsurface conditions such as sediments types (fine-grained layers) and their thickness also affect the occurrence and amount of land subsidence.
D.C. Magnetron Sputtering Coating on Trenches

The development and application of plasma processing such as plasma assisted CVD and PVD become highly important in various industrial fields such as microelectronics, sensors, solar cells, automobiles, cutting tools, etc. In PVD different process are used such as Vacuum Evaporation, Electron Beam evaporation, Sputtering etc. But all processes have common limitation of one as such deposition is inline sight. It is difficult to achieve uniform coating on complex surfaces, holes and trenches. The width dimension and higher aspect ratio (Depth: width >1) of trenches generally in compatible with sputter deposition. When aspect ratio is increased, undesirable discontinuity can be observed at the lower half compared to upper half of trenches. So that 3 axis rotation of substrate holder was designed with a stepper motors to get uniform coating on complex surfaces and holes. The angle of rotation and the speed are controlled by programmed micro controller. By positioning the surface features perpendicular to the plasma the holes, grooves are coated uniformly. The coating was characterized using X-ray diffractometer, SEM and micro hardness tester.
High-Speed Permanent-Magnet Motors for the Oil and Gas Industry

Recent years have seen an increase in high-speed electric compression for Oil & Gas applications where high-speed electric motors drive compressors directly without intermediate gears. To date induction machines have been the predominant workhorse of the industry. The permanent-magnet machine technology provides an alternative that promises a highly reliable and robust system design, especially in applications where motor and compressor are fully integrated and share the same process gas environment. This paper provides an update on the recent progress in developing the permanent magnet technology for Oil & Gas applications in which the process gas may contain corrosive elements.Copyright © 2007 by ASME
NANO FABRICATION OF FinFETS TO FORM NANO SCALED INTEGRATED CIRCUIT CHIPS

Semi-conducting, metallic and insulating nanowires are today’s building blocks in nanotechnology. Due to their small size, anisotropy and cost effectiveness it is viable to integrate Nano scaled elements into Nano IC chips. Strategies have emerged to position nanowires and Nano circuits on substrates to allow integration of Nano electronic devices. In this paper we describe the fabrication and assembly of Nano devices to form functional IC chips on a nanometer scale. Several methods have been developed from nanofabrication based on selfassembled alumina templates, using biomolecules for self-assembly of engineered Nano-scale devices and Nano structuring of ceramic surfaces by ways of unconventional lithographic methods, electron beam induced deposition, electron-ion beam lithography and electron beam direct writing[3]. We will begin by a review of the basic structure of IC chips and their varying properties using different materials and then move on to how these properties differ at a Nano scale. Hence we will describe how the basic components such transistors ( FinFETs ) can be engineered using various lithographic and non-lithographic methods. Hence implementing a majority gate and a 21 MUX by using both gates of FinFET[2] transistors as inputs is presented. Simulation results show that FinFET logic implementation has significant advantages over static CMOS logic and pass transistor logic in terms of power consumption and cell area therefore aiming at the end result which includes Nano-scaled IC chips which provide optimum efficiency and are cost effective[1].
The Relationship between Management Ability and Audit Fees by Considering Firm Credit and Auditor’s Dependency during Financial Crises

This paper aims to assess the relationship between management ability and audit fees by considering firm credit and auditor’s dependency during the financial crisis. Despite the presence of extensive studies on determining factors in audit fees, most of the studies have been concentrated on determining factors at the firm level, and little evidence is available to auditors on the information content of special managerial features. This paper aims to examine the relationship between managerial abilities and audit fees by considering firms' financial crisis conditions.In this paper, management abilities are considered to form three firm size indices, the firm's sales share in the market and cash. Moreover, the standard deviation of 3-year sales is used for firm credit, and an abnormal audit fee is employed for calculating auditor dependency. For this purpose, a total number of 91 listed firms on the Tehran Stock Exchange is evaluated for 6 years between 2014 and 2019. The panel regression model is used for hypothesis testing, and Chow and Hausman's tests are used for selecting the appropriate model-fitting method. The VIF test is used for analyzing linearity among explanatory variables. The obtained results indicate that financial crisis conditions contribute to the relationship between management abilities (based on firm size measurement) and audit fees. Further, the results indicate the negative impact of firm credit on the relationship between audit fee and management ability (based on cash). According to the results, audit fee dependency on the relationship between management ability (based on measurement, the firm's sales share, and cash) and audit fee is positive. Moreover, the results suggest that financial crisis conditions contribute to firm credit effectiveness in the relationship between management ability and audit fees.In past research, some factors affecting the auditor fee are debts, management ability, and auditor independence. In this paper, we contribute to the financial crisis as a variable that influences some of these relationships. And we show that relationships make sense by considering this variable.
Design and Implement of a Computer Forensics Model for Cloud Environments

With the maturing and wide application of cloud computing technology, there are more and more crimes in the environment of cloud computing, effective investigation of evidence against these crimes are extremely important and urgent. Because it features the characteristics of computing environment of virtual, mass storage, distribution of data, multi-tenant and so on, the cloud calculating sets an extremely hard condition for investigation of evidence. For this purpose, this paper presents a reference evidential model for cloud computing environments, and it also discusses the implement to the four aspects of computer evidence.
Spacecraft attitude control using non-singular finite time convergence fast terminal sliding mode

In this work, a finite time convergent, non-singular continuous time sliding mode controller is proposed to control the attitude of rigid spacecraft. The proposed controller is derived using non-singular fast terminal sliding mode (NFTSM) with power rate reaching law. The fast convergence with finite time stability is ensured both in reaching phase as well in sliding phase, and is proved using Lyapunov-type theorem. The effectiveness of proposed controller is verified by numerous simulation results. The results show that attitude control system is made globally stable and robust enough to negate model uncertainties, bounded disturbances, and actuator saturation problems with a control input of continuous nature.
Hot carrier reliability of lateral DMOS transistors

The focus of this paper is on the degradation induced by hot-electrons in lateral DMOS transistors. The physical justification for the abandonment of the existing CMOS test methods is explained. Simulation results supporting the hot-carrier phenomenon occurring are reported and both parametrically and experimentally determined hot-electron safe-operation-areas (HE-SOA) are examined for reliable device operation of 20 V LDNMOS and 20 V LDPMOS.
Polarization dispersion and principal states in a 147-km undersea lightwave cable

The authors describe measurements of polarization dispersion in a 147-km undersea lightwave cable at 1.56 mu m. The wavelength dependence of the transmitted state of polarization was measured and interpreted in terms of the principal states description of polarization dispersion to determine the difference in the propagation delay time between the two principal states of polarization. Measured differential propagation delay times ranged between 2.5 and 10 ps among the four fibers tested. Significant wavelength dependence in both the principal states and the propagation delay times was observed over a 12-AA interval. >
Gas Interference in Sucker Rod Pump

Commonly used artificial lift or dewatering system is sucker rod pump and gas interference of the pump is the biggest issue in the oil and gas industry. Gas lock or fluid pound problems occur due to the gas interference when the pump has partially or completely unfilled plunger barrel. There are several techniques available in the form of patents to solve these problems but those techniques have positive as well as negative aspects. Some of the designs rely on the leakage and some of the designs rely on the mechanical arrangements etc to break the gas lock. The present article compares the existing gas interference handling techniques.
Energy Harvesting Technologies

This report is for the energy harvesting activities in the project, 2020~2021. During 2020~2021, a multi-source Energy harvester for low power applications have been studied explicitly. Solar and wind energy are extracted to supply a wireless sensor and charge a single-cell Li-ion battery. The maximum power point tracking (MPPT) technique implemented using DC-DC Converters for high-efficiency harvesting. Additionally, the proposed CC/CV battery charging algorithm was established based on the renewable source's maximum power availability. At the same time, the Vibration energy harvested using Piezoelectric strings is stored temporarily in a capacitor then discharged into the DC bus or directly to the load through a DC-DC converter to provide more stability to the system responses. Also, multiple control techniques have been developed, such as a linear controller (PI), a combination of linear and non-linear controllers (PI and Hysteresis switching control), and Fuzzy logic controller (FLC). Then a comparison between each controller was observed in both simulation and experimentally for MPPT and CC/CV battery charging. The multi-source energy harvester was implemented on an SMD PCB circuit prototype. Similarly, the Hysteresis switching control (HSC) was implemented as a mixed-signal design using SMD PCB.
Visual field information in nap-of-the-earth flight by teleoperated helmet-mounted displays

The human ability to derive control-oriented visual field information from tele-operated helmet-mounted displays (HMDs) in nap-of-the-earth flight is investigated. The visual field with these types of displays originates from a forward looking infrared radiation camera, gimbal-mounted at the front of the aircraft and slaved to the pilot''s line-of-sight to obtain wide-angle visual coverage. Although these displays are proven effective in Apache and Cobra helicopter night operations, they demand very high pilot proficiency and work load. Experimental work presented in the paper has shown that part of the difficulties encountered in vehicular control by means of these displays can be attributed to the narrow viewing aperture and head/camera slaving system phase lags. Both these shortcomings will impair visuo- vestibular coordination, when voluntary head rotation is present. This might result in errors in estimating the control-oriented visual field information vital in vehicular control, such as the vehicle yaw rate or the anticipated flight path, or might even lead to visuo-vestibular conflicts (motion sickness). Since, under these conditions, the pilot will tend to minimize head rotation, the full wide-angle coverage of the HMD, provided by the line-of-sight slaving system, is not always fully utilized.
Modeling and characterization of spiral resonators embedded in suspended microstrip line for application in low‐loss diplexer

This article presents the design and realization of anovel, low‐loss, compact diplexer providing high selectivity and verygood separation between very narrow spaced working channels for application in the ESEO satellite transceiver. The diplexer is based on spiral resonators (SR) embedded in the suspended microstrip line and forming band‐stop filter structures. For design purpose, the equivalent‐circuit model of the SR resonator embedded in microstrip line is derived, analyzed, and verified. The influence of the model parameters on S11 and S21 characteristics has been studied and discussed. The double stage filter with embedded SR resonators has been described. A novel method is proposed to precisely control the filter selectivity, bandwidth, and the position of S11 minimum. The filter has been applied in the diplexer design. The measured performance of the manufactured diplexer prototype exhibits good properties and good agreement with the simulation results. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:131–135, 2014
Population-Based Design of Surface-Mounted

Permanent-magnet synchronous machines can be designed to obtain high efficiency and high torque density. Population-based optimization methods such as genetic algorithms and particle swarm optimization are gaining acceptance as a means of optimizing the design of this class of machines. This paper builds on the literature by utilizing a computationally efficient machine analysis appropriate for use with population-based optimization methods that enables the consideration of a significantly larger search space than previously reported in the literature. It is also unique in that the relative performance of different parameter en- coding and objective function formulations are considered. Index Terms—Design automation, genetic algorithms (GAs), optimization methods.
High-power continuous-terahertz-wave generation using resonant-antenna-integrated uni-travelling-carrier photodiode

The fabrication of uni-travelling-carrier photodiodes with a resonant antenna for generating high-power continuous terahertz waves is reported. Enhancement of the output power is achieved at frequencies from 0.7 to 1.6 THz, and the maximum output power obtained at 1.04 THz is 10.9 µW.