Miracle-dz/UniFAR-FTUs huggingface dataset:
Fabrication of capacitive absolute pressure sensor using Si-Au eutectic bonding in SOI wafer

A capacitive absolute pressure sensor was fabricated using a large deflected diaphragm with a sealed vacuum cavity formed by removing handling silicon wafer and oxide layers from a SOI wafer after eutectic bonding of a silicon wafer to the SOI wafer. The deflected displacements of the diaphragm formed by the vacuum cavity in the fabricated sensor were similar to simulation results. Initial capacitance values were about 2.18pF and 3.65pF under normal atmosphere, where the thicknesses of the diaphragm used to fabricate the vacuum cavity were 20 µm and 30 µm, respectively. Also, it was confirmed that the differences of capacitance value from 1000hPa to 5hPa were about 2.57pF and 5.35pF, respectively.
FPGAs operating in a radiation environment: lessons learned from FPGAs in space

Field Programmable Gate Arrays (FPGAs) are increasingly being used as a key component of digital systems because of their in-field reprogrammability, low non-recurring engineering costs (NRE), and relatively short design cycle. Recently, there has been great interest in using FPGAs within spacecraft. FPGAs, like all semiconductor devices, are susceptible to the effects of radiation. There is an active research community investigating the effects of radiation on FPGAs and developing methods to mitigate against these effects. There has been significant progress over the last decade in the understanding and developing FPGA technology that is resistant to the effects of radiation. The success of FPGAs within spacecraft suggests that FPGAs may be used in particle physics experiments where radiation levels are considerable higher than the conventional terrestrial earth environment. This paper will summarize the effects of radiation on FPGAs, methods to mitigate against these effects, provide a case study of a successful FPGA system operating in space, and discuss the issues that will affect the use of FPGAs within particle physics experiments.
Changes in Land Use in the Lombok River Basin and Their Impacts on River Basin Management Sustainability

Sustainable management in water resources development strategies depends on the knowledge of phenomena of changes in land use in the river basin as a significant tool in understanding the interactions of environment and human activities. Changes that occur within a certain period on the land cover or land use impacts the basin characteristics, which will ultimately affect river basin management. This paper studies the change of land use in the Lombok river basin in Indonesia based on the Moderate Resolution Imaging Spectroradiometer (MODIS) land use/land cover data version 6 from the years of 2001, 2010, and 2016 which were derived using MODIS Terra and Aqua reflectance supervised classification data. Land use data was then classified into fifteen land use categories according to SWAT classification. QGIS and MapWindow software were applied to analyse the features of land use in the study area, and the SWAT simulation model was applied to simulate the impacts of changing land use in the sub-basin. The study concludes that areas with occurrences of changes in land use impacted the river runoff in the sub-basin. Analysis of river basin land use, when combined with simulation in water resources management, will contribute to optimal and sustainable river basin planning.
Optics and Lasers: Including Fibers and Optical Waveguides

The aim of this book is to present practical, applied optics to the advanced undergraduate, postgraduate, or researcher in a way that stresses physical principles and uses a minimum of sophisticated mathematics. It covers lasers, holography and Fourier optics, scanning and video microscopy, fibers and integrated optics, as well as optical instrumentation, radiometry, interferometry and coherence, in a single volume. New in this edition are sections on video microscopy, scanning confocal microscopy, digital image processing, optical fiber connectors and splicers, and an expanded section on integrated optics.
MICE Online Data Quality Journal of Physics: Conference Series

Within the Muon Ionization Cooling Experiment (MICE), the MICE Analysis User Software (MAUS) framework performs both online analysis of live data and detailed offline data analysis, simulation, and accelerator design. MAUS consists of four key components: inputters to handle input of live, archived or simulated data; transforms to analyse data; mergers to summarise transformed data in the form of histograms and tables; and outtputters to save this summarised data as images or tabular data. MAUS supports parallel data transformation in a map-reduce-inspired approach, however, the requirements of online reconstruction precluded adoption of a traditional map-reduce solution. A document-oriented database is used to cache transformed data, prior to merging, to support concurrent merging and visualisation of data. In MAUS, both offline and online analysis are implemented and executed in the same way, thereby removing the need for MICE to maintain and use two sets of analysis software, a common requirement elsewhere in experimental particle physics.
Optical links for ATLAS liquid argon calorimeter front-end electronics readout

We present the optical data links for the ATLAS liquid argon calorimeter. The current status of the vertical cavity surface emitting laser failures, the up-to-date results in searching for the failure cause, experiences gained in the searching process, possible backup plans for the optical transmitters and the lessons learned are also discussed.
Magneto Optical Rotation in the Doppler- broadened Spectrum of Rb atoms in Intermediate fields

Doppler-broadened absorption spectrum of rubidium (87Rb and 85Rb) D2 line has been studied in the presence of a magnetic field of intermediate strength i.e. up to 5mT. Resonant non - linear magneto optical rotation is measured in the Doppler broadened spectrum of rubidium atomic vapour. Low light intensity approximation in the intermediate field region has been made to calculate the magneto optical rotation and to compare with experimental data. The enhancement of non-linear magneto optical rotation is discussed taking into account hole burning and circular birefringence in the intermediate field region.
Analysis of switch and examine combining with post-examining selection in cognitive radio

ABSTRACT To perform spectrum sensing in fading environment is one of the most challenging tasks for a CR system. Diversity combining schemes are used to combat the effect of fading and hence detection probability of CR gets improved. Among many diversity combining techniques, switched diversity offers one of the lowest complexity solutions. The receiver embedded with switched diversity looks for an acceptable diversity path (having signal to noise ratio (SNR) above the required threshold) to receive the data. In conventional switch and examine combining (SEC) scheme, when no acceptable path is found after all the paths are examined, the receiver randomly chooses an unacceptable path. Switch and examine combining with post-examining selection (SECp) is a modified version of conventional SEC. In SECp, the conventional SEC scheme is altered in a way that it selects the best path when no acceptable path is found after all paths have been examined. In this paper, formula for probability of detection () is derived using SECp and SEC diversity combining technique over Rayleigh fading channel. Also the performance of SECp is compared with SEC and no diversity case. Performance comparison is done with the help of SNR vs. and complementary receiver operating characteristic curves.
Application of the SR-PhC-μCT technique with phase retrieval for the characterization of internal and external structures of Rhodnius prolixus

The present work is the second one of a two- part publication on the use of Synchrotron Radiation Phase Contrast microtomography (SR-PhC-μCT) for the study of Rhodnius prolixus morphology. In previous paper the visualization of various detailed features were highlighted thanks to the edge enhancement effects typical of the phase contrast technique, but the contrast between foreground and background remained poor. In this study the same data set have been re-visited with application of a single distance phase retrieval algorithm. The resulting slices showed very high quality images that enable a better visualization of important muscles and neurohemal organs of the central nervous system within the head of Rhodnius prolixus.
Research on Data Auditing Technology Based on PARCC

In order to improve the data security in the computing environment, a “public auditing” scheme PARCC was proposed for the regenerative coding data in the cloud computing system. PARCC allows the user to use a third-party auditor TPA to remote check the integrity of the data. In addition, in order to solve the data owner without online failure data/signature of regeneration, was introduced to the system in one and a half-trusted agent, and designed a new data signature scheme, allowing the agent to replace the data owner to provide renewable data valid signatures. Considering the privacy protection of data, the random cover method of coefficient in PARCC scheme ensures that the user data will not be leaked during the audit and repair process. The safety of the scheme is proved, and the performance of the scheme is comprehensively evaluated and analyzed through the theory. The results show that the scheme has good performance.
Temporal and spatial changes in mixed layer properties and atmospheric net heat flux in the Nordic Seas

The Nordic Seas are an important area of the World Ocean where warm Atlantic waters penetrate far north forming the mild climate of Northern Europe. These waters represent the northern rim of the global thermohaline circulation. Estimates of the relationships between the net heat flux and mixed layer properties in the Nordic Seas are examined. Oceanographic data are derived from the Oceanographic Data Base (ODB) compiled in the Arctic and Antarctic Research Institute. Ocean weather ship 'Mike' (OWS) data are used to calculate radiative and turbulent components of the net heat flux. The net shortwave flux was calculated using a satellite albedo dataset and the EPA model. The net longwave flux was estimated by Southampton Oceanography Centre (SOC) method. Turbulent fluxes at the air-sea interface were calculated using the COARE 3.0 algorithm. The net heat flux was calculated by using oceanographic and meteorological data of the OWS 'Mike'. The mixed layer depth was estimated for the period since 2002 until 2009 by the 'Mike' data as well. A good correlation between these two parameters has been found. Sensible and latent heat fluxes controlled by surface air temperature/sea surface temperature gradient are the main contributors into net heat flux. Significant correlation was found between heat fluxes variations at the OWS 'Mike' location and sea ice export from the Arctic Ocean.
Adesão ao tratamento da dor crônica e o locus de controle da saúde

Objetivou-se avaliar a adesao dos doentes com dor cronica nao oncologica ao tratamento e identificar relacoes entre a crenca de controle da saude e a adesao. Trinta doentes foram avaliados durante seis meses, em cinco entrevistas. A adesao foi classificada em plena, parcial e nao adesao, e foi calculado o Indice de Acerto de Ingestao Medicamentosa (IAIM). A crenca de controle da saude foi avaliada por meio da Escala de Locus de Controle da Saude. Observaram-se altos indices de adesao parcial e nao adesao ao tratamento (40,0% a 56,7%), medias do IAIM entre 57,2% e 69,5%, e que doentes com crencas de maior "internalidade" aderiram menos ao tratamento.
Factors and actors for enhancing community flood resilience: An experience from a river-side settlement in Bangladesh

Purpose Enhancing community flood resilience is a critical aspect of flood risk management which requires a systematic process of capacity building through incorporating mitigation measures. The inhabitants of South Rishipara, a riverside settlement of Bangladesh, are accommodating themselves in a flood-prone location through modifying their built-environment. The main objective of this paper is to conduct a detail investigation regarding the built-environment development and find out roles of different actors and contributing factors for enhancing community flood resilience. Design/methodology/approach This case-study based post-positivist research employs multiple lines of inquiries which include, focus group discussions, transect walks, in-depth semi-structured interviews, pair-wise comparisons and a questionnaire survey, mostly in a participatory appraisal manner to get data about community experiences and perceptions. Findings About 66.7% of respondents identified themselves as severely affected due .
The effects of current density ratio and reflectivity on the gain, saturation and noise characteristics of a two-section MQW RSOA

A 1.3 μm two-section multi-quantum well reflective semiconductor optical amplifier is designed and fabricated. The impacts of injection current density ratio and the reflectivity of the reflective facet on gain, saturation and noise characteristics are studied theoretically and experimentally. The results indicate that the gain and saturation power can be easily manipulated by changing the current density ratio; and better gain and noise characteristics can be obtained when the reflectivity is appropriately selected.
Broadband light emission from optically-trapped carbon nanotubes

Optical micromanipulation of carbon nanotubes (CNT), that has hitherto been elusive, has been achieved in an aqueous suspension of CNTs in an optical tweezers setup, via the mediation of microbubbles. These microbubbles are formed when CNT bundles are brought to the focal volume. With the bubbles themselves being easily trappable in the tweezers, the CNTs adhered to the surface of the microbubbles can now be held immobilised. CNTs held in the optical trap focus are found to emit bright light in the visible, which may be a sustained glow, or an uncontrolled flare. These observations and the underlying mechanisms will be discussed in the talk.
Inkjet printing - the physics of manipulating liquid jets and drops

Over the last 30 years inkjet printing technology has been developed for many applications including: product date codes, mailing shots, desktop printing, large-area graphics and, most recently, the direct writing of materials to form electronic, biological, polymeric and metallic devices. The new non-graphical applications require higher print rates, better resolution and higher reliability while printing more complex, non-Newtonian and heavily solids-loaded liquids. This makes the understanding of the physics involved in the precise manipulation of liquid jets and drops ever more important. The proper understanding and control of jet formation and subsequent motion of the jetted materials requires physical studies into material properties at very high shear rates, acoustic modes in print heads, instabilities of jets, drop formation, drop motion, stretching of fluid ligaments, the role of polymers in jet break up, electrical charging of drops and the aerodynamic and electrostatic interaction of jets and drops in flight. Techniques for observation, measurement and analysis are evolving to assist these studies. This paper presents some examples of the application of physics to understanding and implementing inkjet printing, including recent work at the Cambridge Inkjet Research Centre.
Simulations of the multipactor phenomenon for surfaces with semi-spherical depressions

A study of the electron motion in an rf electric field is performed by means of numerical simulations taking into account the spread in electron initial velocities and their angular distribution. It is shown that the absorption of the electrons inside the semi-spherical depressions which in our two-dimensional model are represented by semi-circles, results in a significant reduction of the secondary emission yield. We also find that secondary electron emission is largely sensitive to a rough measure of the fractional surface area of the depressions (in our model the ratio of the sum of the diameters of the semicircles to the length of waveguide). Although the growth of a multipactor is still possible for such a surface, we show that the threshold for the multipactor phenonmenon is higher than that for a flat surface. The surface we have considered in this paper may be considered as a simplified model of sandblasted surfaces, which have already been considered for multipactor reduction.
Improved solution for geolocating a known altitude source using TDOA and FDOA under random sensor location errors

Geolocating a stationary ground source using the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements from more than two sensors with random location errors is considered. The source altitude is known and a constrained weighted least square (WLS) problem is formulated for the geolocation task. The optimisation problem is solved by searching for the source-reference sensor distance in its feasible region and the source position estimate minimising the cost function. Simulations show the improved robustness of the proposed method over two existing solutions under high noise levels.
La gamificación en la educación superior: una revisión sistemática

Gamification is shown as an alternative for traditional classroom strategies and is increasingly used in higher education. The purpose of the revision is to know the way gamification has brought more interest in the following fields of knowledge in terms of bibliographic production and use: management and economics, arts and humanities, health sciences, natural and exact sciences, social and juridical sciences, engineering, and architecture. Participation was identified according to results in nine academic databases. The field with the highest percentage, based on the scale defined in the methodology, is Engineering and Architecture (3.15), while health sciences obtained 0.49. It is clearly seen that gamification is a field explored in higher education and experiences which have generated its application are different. Setting usage guidelines is recommended, including studies of a bigger scope in order to know its real effects on the learning process.
Local Recovery Coordinators and the National Disaster Recovery Framework: Questions Regarding the Form, Necessity, and Potential of the Role

Abstract This article discusses the “uncoordinated” critique of the disaster recovery process and the current attempt to address the issue through the National Disaster Recovery Framework (NDRF). Scholars have identified that the topic of coordination in disaster recovery is one that needs policy attention and it is laudable that the federal government has provided such focused attention by way of the NDRF. Yet, it is also important to critically examine whether the NDRF’s proposed recovery coordination vision – the local disaster recovery manager – is a reasonable foundation upon which to address the issues of recovery processes nationwide. This article examines this issue by discussing the extent to which the NDRF recovery manager role is consistent with what the literature would suggest, the extent to which the NDRF role is needed, and the extent to which it is possible that the NDRF-depicted local role be fulfilled across the country. Implications for the vision set out in the NDRF and recommendations for future research are discussed in light of this analysis.
Shape sensitivity for a two-phase heat conduction problem considering nanoscale effects

Thermal design is essential when developing various types of technological devices, especially miniaturized electronic devices. Conventional thermal design methods that only focus on macrostructures can provide only limited improvements in electronic device performance. On the other hand, in recent years, the implementation of nanostructural designs that take advantage of the unique properties of heat conduction at the nanoscale has resulted in electronic devices offering unprecedentedly high performance. Nanoscale heat conduction is a ballistic process, whereas heat conduction at the macroscale is diffusive. When a system is a two-phase domain, temperature discontinuities occur on the material interfaces. High-performance devices have been developed by utilizing these unique phenomena, especially the interface effect. However, few reports have proposed thermal design criteria, and thermal designs have been dependent on heuristic approaches. The development of design guidelines applicable to nanoscale thermal problems is a fundamental requirement, and one of the most effective design criteria is shape sensitivity, which indicates how to deal with material interfaces based on physics and mathematics. In this paper, we propose a shape sensitivity analysis method for a two-phase thermal design problem considering temperature discontinuities. We first explain the difference between nanoscale and macroscale heat conduction and introduce a numerical analysis method for nanoscale heat conduction based on the Boltzmann transport equation. Next, we construct a method for shape sensitivity analysis for a heat conduction problem considering two-phase nanoscale effects such as temperature discontinuities, by expanding the work of Pantz, based on Céa’s method. The validity of our shape sensitivity analysis is demonstrated through two numerical examples.
Dual-layer partially reflective surface antennas based on extended size unit cells for 60 GHz band WLAN/WPAN

In this study, planar dual-layer partially reflective surface, also known as frequency selective surface (FSS), antennas have been presented for 60 GHz band (57.24–65.88 GHz) wireless local area network (WLAN) and wireless personal area network (WPAN) applications. The FSS is excited through a microstrip patch antenna array of two elements designed at 63.72 GHz with return loss (S11) bandwidth and gain of 5.55 GHz and 13.2 dBi, respectively. Both the FSS unit cell and the feeding patch elements are set to be the same and they are designed based on the patch antenna size improvement method to convince the fabrication limitations imposed by the conventional printed circuit board etching process. Then three double layers FSS antennas have been designed with 2-elements, 12-elements and 24-elements in each FSS layer and measured gains of 15.6, 19.1 and 19.75 dBi, respectively, are achieved. It has also been found that when more layers and number of FSS elements are employed to improve the antenna gain, the overall S11 and gain bandwidth is reduced. In all the cases the measured results agreed well with the simulated results.
A compact 1:15 unequal Wilkinson power divider using A‐CRLH coupled lines

A novel asymmetric composite right/left‐handed (A‐CRLH) coupled‐line circuit structure for a miniaturized unequal Wilkinson power divider (WPD) with arbitrary large power division ratio and reduced arm's length is proposed. Compared with the traditional unequal WPD, using the A‐CRLH coupled‐line section in the proposed power divider, due to its controllable phase response and characteristic impedances, not only leads to more compact layout but also results in a larger power‐dividing ratio with relaxed line width and separation. The simplified design procedure along with closed form equations based on c‐ and π‐mode analysis and transmission‐line‐based metamaterial theory is derived. For demonstration, a practical A‐CRLH WPD with a high power‐dividing ratio of 1:15 as a typical example, at 1.4 GHz is designed, simulated and fabricated. The occurred area of the implemented power divider is 58.7% smaller than that of the conventional one at the same frequency and its experimental results show good agreement with simulation data.