Miracle-dz/UniFAR-FTUs huggingface dataset:
V-band reflection-type phase shifters using micromachined CPW coupler and RF switches

Micromachined reflection-type phase shifters with small size and low loss for V-band communication systems are described. Two- and three-bit reflection type phase shifters were designed, fabricated, and measured. The micromachined air-gap overlay coupler and the direct contact type series switches were employed to implement the phase shift and reduce an insertion loss. The phase shift can be obtained by changing the length of the open-ended stubs using the cascaded MEMS switches. The fabricated two-bit phase shifter has a measured phase shift of 0/spl deg/, 41.5/spl deg/, 84.3/spl deg/, and 128.7/spl deg/ with the consecutive actuation of the series MEMS switches. The actuation voltage of the switches is 35 V and the measured switching ON time is 5.1 /spl mu/s. The average insertion loss of the two-bit phase shifter measured 4.1 dB at 60 GHz and the return losses for all phase shift states are better than 11.7 dB from 50 to 70 GHz. The two-bit phase shifter is small, 1.5 mm /spl times/ 2.1 mm. By cascading the two-bit phase shifter and a 180/spl deg/ phase shifter (one-bit), a three-bit phase shifter is realized, which has a phase shift of 265.5/spl deg/ and an average insertion loss of 4.85 dB at 60 GHz. The size of the three-bit phase shifter is 3.2 mm /spl times/ 2.1 mm.
Results of the test of a pair of 20 kA HTS currents leads

A new series connected 25 T hybrid magnet system is being set up by the Helmholtz Zentrum Berlin (HZB) for neutron scattering experiments. CRPP has designed and manufactured a pair of 20 kA current leads for the powering of the outer superconducting coils of the hybrid magnet system. In connection with the test of joints for JT60SA, the current leads were tested at ENEA at low voltage up to a current of 18 kA. The mass flow rates required to cool the current leads at different currents measured in the test are in line with the design calculations. For the sum of the resistances of the warm and cold end copper contacts of the HTS module values of 13 (Lead A) and 11 nΩ (Lead B) were measured. In addition, the helium flow through the heat exchanger part was stopped at 10 and 12 kA to study the behaviour of the current leads in case of a loss of flow. The time elapsed between stopping of the helium mass flow and the initiation of a quench was found to be 117 s (Lead A) and 125 s (Lead B) compared to a calculated value of 86 s. The lower value obtained by the calculation can be attributed to the lower initial temperatures in the experiment.
Intellectual Property Rights on Research Tools: Incentives or Barriers to Innovation? Case Studies of Rice Genomics and Plant Transformation Technologies

upstream innovators might simply block or "hold up" the commercialization of some downstream technolo- gies. This paper examines the role of patents in the development and use of two platform technologies for plant biotechnology—plant transformation techniques and structural genomics. We find that patents were important in inducing private firms to develop these platform technologies. Their development led to the com- mercialization of more genetically modified (GM) varieties more rapidly than would have been the case otherwise. We identified some examples of research and GM variety marketing that were slowed down by the patents on tools. However, our preliminary assessment of the evidence suggests that the benefits from pat- ents on tools outweigh the costs.
Inequitable Hunger: Scope, Effects, and Perceptions of College Student Food Insecurity

Food insecurity (FI) is a leading public health concern yet is understudied amongst postsecondary students. A substantial proportion (34.4%) of our student sample reported FI; Black, low-SES, and low-SES women students were most likely to experience FI; and FI was related to poorer academic, health, and stress outcomes. Employee awareness was low, and some expressed negative sentiments. We demonstrate the need for research and intervention not only on FI but also on faculty/staff awareness and attitudes.
Special Employment Centres, Time Factor and Sustainable Human Resources Management in Spanish Hotel Industry: Can Corporate Social Marketing Improve the Labour Situation of People with Disabilities?

Background: Low-quality jobs, long working hours and difficult scheduling of hours have been usually reported in the hotel industry. The situation is more difficult for people with disabilities (PWD), even more in the COVID-19 crisis, especially in terms of labour inclusion (due to the labour discrimination usually suffered by this collective). Thus, Special Employment Centres (SEC) have been created in Spain to spread protected employment of PWD. Although they are improving the situation in the short term, the long-term impact developing sustainable employment is not clear. The objective of this paper is to analyze the Spanish situation, the possible differences between sheltered employment and the ordinary labour market, how SEC could be improving (or not) their labour situation in the hotel sector in the long term, and the potential of incorporating Corporate Social Marketing to overcome the problem. Methods: A content bibliographic analysis has been carried out according to the latest research about this topic, using a ProKnow-C methodology. Results: There seems to be two different groups of papers (supply and demand sides), being the supply side one (focused on HR practices about PWD inclusion and managers’ perceptions of workers with disabilities) more related to our research objective. Furthermore, few articles were found about SEC and Corporate Social Marketing in relation to this topic, highlighting the originality of this research approach. Conclusions: According to our bibliographic portfolio, the presence of labour discrimination in the regular market is more evident; and, in the long term, two opposite situations could be happening simultaneously: (a) SEC would be reinforcing the social stigma, hindering the labour situation of PWD; (b) SEC could be changing the social perspectives of clients and all society in a positive manner. Therefore, it would be necessary to go in-depth into the present subject, from an academic but also practical perspective, incorporating an innovative Corporate Social Marketing approach in order to shed new light on this issue and improving effective sustainable employment of PWD.
Wind Erosion Research Accomplishments and Needs

ABSTRACT TREMENDOUS progress has been made in under-standing the wind erosion process and the influ-ence of the various soil and climatic parameters associated with wind erosion. A model has been developed that will estimate potential annual wind erosion. The opportunities for significant advancements in wind erosion are limited only by the vision of the scientist conducting the research. Major needs are the develop-ment of soil flux models for predicting erosion from single events, more dependable field wind erosion sam-pling equipment, identification of the impact of con-tinued erosion on soil productivity, extension of benefit of emergency tillage, and optimization of barrier influ-ence by designing the height-density-spacing of multiple barriers.
Telemedicine use in 2020 during the COVID-19 pandemic among community dwelling U.S. Medicare beneficiaries

Objective: CMS reimbursement regulations for telemedicine changed after the onset of the COVID-19 pandemic. This study aimed to assess telemedicine utilization patterns offered by health care providers and used by Medicare beneficiaries during the COVID-19 pandemic during 2020.Methods: This study used the Fall 2020 Medicare Current Beneficiary Survey (MCBS) supplemental COVID-19 survey to identify Medicare beneficiaries (≥ 65 years) with a regular place for medical care that offered telemedicine during 2020. Major outcomes: prevalence for whether telemedicine was offered before and during the pandemic, telemedicine use, and digital access to telemedicine. Logistic regression identified the demographic factors associated with telemedicine use.Results: The study sample included 4,380 eligible individual Medicare beneficiaries ≥ 65 years. Of those, 42.9% made telemedicine visits during the pandemic. Approximately 60% of the telemedicine visits were conducted via telephone. Telemedicine was offered to 18% of the respondents before the pandemic vs. 64% during year 2020 of the pandemic. Among telemedicine users, 57.2%, 28.3%, and 14.5% used voice calls, video calls, and both voice and video calls for health care appointments, respectively. Overall telemedicine use varied by sex, race, and region. Individuals 65-74 years, female, living in a metropolitan area, with higher incomes were more likely to make video visits. Experience using telecommunications via the internet influenced telemedicine use significantly.Conclusions: Telemedicine offered to older Medicare beneficiaries increased dramatically after the onset of the COVID-19 pandemic. Yet, less than half used telemedicine and differences in utilization existed by demographic characteristics.
Cultivation and study of growth of oyster mushroom on different agricultural waste substrate and its nutrient analysis

The cultivation of edible fungi is a controlled bio conservation of agro industrial lingo-cellulosic wa ste & residues. Mushroom cultivation fits in very well with sustain able farming & has several advantages. It uses agri cultural waste products. A high production per surface area can be obtained, after picking the spent substrate is still a good soil conditioner. The Mushrooms are good cash crop. The development of Oyster mushroom (Grey and pink) prod uction methodologies on agricultural waste like Paddy stra w and wheat straw gives very high yield as well as the nutritional contain like carbohydrate, protein, ash , calcium, magnesium, crude fibers and lipid were c
EM propagation in tunnels

Various aspects of electromagnetic wave propagation in tunnels and of radio communication in such media are reviewed. A quantitative description is given for propagation in empty tunnels and in tunnels containing axial conductors or leaky feeders. The limitations of such simplified approaches are stressed. Quantitative studies of these phenomena are then reviewed. Engineering considerations are briefly mentioned. Attention is drawn to mode conversion techniques and to the multimode operation of systems. It is concluded that the theoretical aspects of EM wave propagation in tunnels are currently well understood, although work remains to be done on wideband and microwave communication systems. >
Effect of Low-Temperature Pyrolysis Conditions on Biochar for Agricultural Use

The removal of crop residues for bio-energy production reduces the formation of soil organic carbon (SOC) and therefore can have negative impacts on soil fertility. Pyrolysis (thermoconversion of biomass under anaerobic conditions) generates liquid or gaseous fuels and a char (biochar) recalcitrant against decomposition. Biochar can be used to increase SOC and cycle nutrients back into agricultural fields. In this case, crop residues can be used as a potential energy source as well as to sequester carbon (C) and improve soil quality. To evaluate the agronomic potential of biochar, we analyzed biochar produced from poultry litter, peanut hulls, and pine chips produced at 400°C and 500°C with or without steam activation. The C content of the biochar ranged from 40% in the poultry litter (PL) biochar to 78% in the pine chip (PC) biochar. The total and Mehlich I extractable nutrient concentrations in the biochar were strongly influenced by feedstock. Feedstock nutrients (P, K, Ca, Mg) were concentrated in the biochar and were significantly higher in the biochars produced at 500°C. A large proportion of N was conserved in the biochar, ranging from 27.4% in the PL biochar to 89.6% in the PC biochar. The amount of N conserved was inversely proportional to the feedstock N concentration. The cation exchange capacity was significantly higher in biochar produced at lower temperature. The results indicate that, depending on feedstock, some biochars have potential to serve as nutrient sources as well as sequester C.
Machine vision methods for defect sorting stonefruit

A machine vision system consisting of an illumination chamber, monochromatic camera with a near infrared band-pass filter, frame grabber, and microcomputer was developed. Defect segmentation and image processing methods were developed using histograms of peach and defect pixels along the rows and columns. The feature extraction techniques were simple, fast, and well suited for pipeline image processing hardware because they used raster scans. Tests were conducted to study the performance of the machine vision system at detecting and identifying major defects. The overall classification error in identifying peaches with major defects (cut, scar, bruise, and wormhole) was 28.6%. Errors were primarily due to natural variability in the features. Correlation coefficients between machine predicted and manually measured defect areas were 0.75 and 0.72 for bruise and scar, respectively. Surface curvature and manual measurement errors were primary causes of variability.
Design of waveguide narrow-wall short-slot couplers

It is shown that the broad-band coupling properties of narrow-wall short-slot directional couplers and hybrids are due to the effect of the evanescent TE/sub 30/ mode in the coupling region. This causes a change to the effective phase length of the even-mode circuit, especially when a central tuning element is used. Using the results of a previous paper on the formation of an equivalent circuit from the generalized scattering matrix, an equivalent circuit for the even mode of the coupler is formed, clearly depicting the effect of the TE/sub 30/ mode.
Novel design of tri-band bandpass filter based on fractal-shaped geometry of a complementary single split ring resonator

A novel electrically small composite right/left-handed transmission line (CRLH TL) cell based on the Minkowski-shaped geometry of a complementary single split ring resonator is proposed and analysed by the S parameters extraction method. EM simulation results have confirmed the roughly tri-band response of the proposed CRLH TL cell attributed to the fractal multiband nature. A tri-band bandpass filter (BPF) centred at 1.1, 2 and 2.74 GHz with minimum insertion loss 0.4, 1.1 and 1.45 dB was synthesised and fabricated by employing an additional two Hilbert-shaped quarter-wave open-circuit stubs which provided transmission zeros located between passbands to obtain high selectivity. This simple design concept was verified by measurement as well as simulation results.
Trust upset: Redefining the terms of trust in maintaining exchange relations

In contractual relations, malfeasance is subject to sanction by formal institutions. Trust is widely held to be an informal basis of non-contractual exchange, in which breaches of trust lead to exposure, resulting in the perpetrator’s loss of reputation and likely exclusion from future exchanges. The present article, on the other hand, shows that breaches of trust may lead to neither of these outcomes. Interview data reported here show that individuals who experience violations of agreement may develop coping strategies that do not include exposure of betrayal, confronting the trust-breaker, or retaliation. A contribution of the present article is to show that these differences can be conceptualized as involving two possible strategies by the betrayed party: one involving retaliation, directed to public disclosure of the betrayer’s unreliability and possible expulsion from future exchanges; the other is self-management, in which betrayal leads to the betrayed modifying their expectations and behaviour. A second contribution is to show how trust may be sociologically understood as a continuous process, requiring renegotiation, rearticulation, and even redefinition, rather than as a resolved and final commitment.
Magnetic Force Calculation of Movable YBCO Superconducting Helical Coils Applicable to Electric Vehicles Wireless Power Transfer

Background and Objectives: Today, replacing gasoline-powered vehicles with electric vehicles (EVs) and connecting them to an electric power source have made the optimal usage of energy-saving resources. Therefore, wireless Power Transfer (WPT) outstands as an alternative technology to improve the user perception about the charging process of the EVs. Superconducting coils (SCs) with high-temperature have an applied feature in decreasing losses of wireless power transmission (WPT). The Magnetic force has effects of overall deformation modes between two current carrier superconducting coils, i.e. axial extension, torsion, and bending. Coil misalignment is a fundamental problem and its impact on wireless power transmission efficiency is very complex. The analysis of a magnetic force which is presented in this paper are beneficially for the design and application of the WPT systems. Here, a fast analytical solution is presented to obtain the magnetic force between the transmitter and receiver helical superconducting coils in different positions.Methods: In this paper, a new method applied to solve the numerically magnetic force solutions in different superconducting coils mismatch states for WPT. Finally, for improvement of efficiency, the WPT system has been designed on the basis of mutual inductance changes which receiving helical coil was moved inside the transmitting helical coil. Hence, the magnetic force calculation of movable YBCO superconducting helical coils inside each other is presented. These models have been compared with the FEM.Results: Results show that the presented equations are reliable as well. According to the comparing the analysis and FEM data, the obtained results indicated the errors with less than 0.0064%. Also, results show an excellent agreement with respect to the finite element method.Conclusion: In this paper, the numerical solutions of magnetic force in different superconducting coils mismatch states were solved by a new method. The magnetic force analysis basics introduced in this paper are useful to develop and apply for wireless power transmission system. The simulation results show that only by applying some constraints, the efficiency of the transmitted wireless power will be optimized. Then, analytical models have been presented which make it possible to calculate the axial force which was exerted between two axially Helical magnetized and two thin coils in air. Also, the analytical stiffness calculation applied between these distributions of magnetic source has been presented. These models have been compared with the FEM to show an appropriate consistency.
Statistically optimal synthesis banks for subband coders

In maximally decimated filter banks, the perfect reconstruction or biorthogonal solution is not necessarily the best choice when subband quantizers are present. Under suitable statistical assumptions, expressions for the best synthesis bank can be derived in terms of the analysis bank and other statistical quantities. We explore this topic for subband coders and the special case of transform coders. We highlight the statistical conditions under which the biorthogonal solution is still the best. We derive expressions for the Wiener filter matrix in terms of the joint statistics of appropriate signals. Special cases where the optimal synthesis filter bank is the biorthogonal system followed by a scalar post filter are also considered. <<ETX>>
Speed control of DC motor using adaptive variable structure control

This paper describes the design and the simulation of a robust adaptive discrete variable structure control (AVSC) scheme for a high performance DC motor. The objective of the proposed controller is to control the motor speed and/or position to follow the desired value at all times. Unlike the conventional variable structure control (VSC) scheme, the parameters of the controller are calculated and updated every sampling interval based on the identified parameters of the system model. The proposed controller is robust to parameters' variation and external disturbances. In addition, the chattering in the control input and in the motor current are minimized. Simulation results reported showing the advantages of the proposed control technique compared to the conventional VSC scheme.
Paving the way for progress in employee agility research: a systematic literature review and framework

Abstract Troubled by increasing uncertainty in the business environment, many organizations have a strong need to become agile. There are indications that agility-oriented characteristics of employees, often referred to as “workforce agility”, play a key role in this regard. This paper systematically reviews the academic literature on employee agility, with an emphasis on conceptualization, operationalization, and the special role of human resource management (HRM) in shaping it. Our study finds that construct clarity, theoretical foundation, and rigor in operationalization are not yet well established, and that the role of HRM is under-researched. In order to pave the way for future research, we clarify the understanding of the employee agility concept and suggest a new definition resulting from our theoretical discussion. We embed this conceptualization in a newly suggested framework which is rooted in the work stressor framework. It links employee agility to the job demands of a dynamic environment, and outlines the role of flexibility-promoting HR practices. As such, we explicitly refer to a dynamic lens on person-environment (P-E) fit theory. Furthermore, through the suggested conceptualization of employee agility and the theory-based framework, we amplify existing theory. Based on our findings, we draw up an encompassing agenda for future research.
Report on a joint BIPM-EUROMET project for the fabrication of QHE samples by the LEP

The quantum Hall effect (QHE) samples fabricated by LEP according to specifications intended to optimize their usefulness in metrology are described. Their measured characteristics, notably carrier density, carrier mobility at zero magnetic field, dependence of the quantized resistance on temperature, measuring current, and the quality of electrical contacts, are reported. >
Presentation of the VitiMeteo forecasting system

2 company GEOsens, D 79285 Ebringen (Germany) 3 Agroscope Changins-Wadenswil, 260 Nyon (Switzerland) 4 Agroscope Changins-Wadenswil, 8820 Wadenswil (Switzerland) IOBC Meeting 2013 IOBC-WPRS Meeting of the Working Group on "Integrated Protection and Production in Viticulture" October 13-17, 2013, Ascona, Switzerland Agroscope Changins-Wadenswil Staatliches Weinbauinstitut Freiburg GEOsens Softwareentwicklung