Miracle-dz/UniFAR-FTUs huggingface dataset:
Absolute depth using low-cost light field cameras

Digital cameras are increasingly used for measurement tasks within engineering scenarios, often being part of metrology platforms. Existing cameras are well equipped to provide 2D information about the fields of view (FOV) they observe, the objects within the FOV, and the accompanying environments. But for some applications these 2D results are not sufficient, specifically applications that require Z dimensional data (depth data) along with the X and Y dimensional data. New designs of camera systems have previously been developed by integrating multiple cameras to provide 3D data, ranging from 2 camera photogrammetry to multiple camera stereo systems. Many earlier attempts to record 3D data on 2D sensors have been completed, and likewise many research groups around the world are currently working on camera technology but from different perspectives; computer vision, algorithm development, metrology, etc. Plenoptic or Lightfield camera technology was defined as a technique over 100 years ago but has remained dormant as a potential metrology instrument. Lightfield cameras utilize an additional Micro Lens Array (MLA) in front of the imaging sensor, to create multiple viewpoints of the same scene and allow encoding of depth information. A small number of companies have explored the potential of lightfield cameras, but in the majority, these have been aimed at domestic consumer photography, only ever recording scenes as relative scale greyscale images. This research considers the potential for lightfield cameras to be used for world scene metrology applications, specifically to record absolute coordinate data. Specific interest has been paid to a range of low cost lightfield cameras to; understand the functional/behavioural characteristics of the optics, identify potential need for optical and/or algorithm development, define sensitivity, repeatability and accuracy characteristics and limiting thresholds of use, and allow quantified 3D absolute scale coordinate data to be extracted from the images. The novel output of this work is; an analysis of lightfield camera system sensitivity leading to the definition of Active Zones (linear data generation good data) and In-active Zones (non-linear data generation poor data), development of bespoke calibration algorithms that remove radial/tangential distortion from the data captured using any MLA based camera, and, a light field camera independent algorithm that allows the delivery of 3D coordinate data in absolute units within a well-defined measurable range from a given camera.
Prediction of external corrosion rate in Oil and Gas platforms using ensemble learning

Goal: This study aims to use artificial intelligence, specifically a random forest model, to predict the annual corrosion rate on FPSO offshore platforms in the oil and gas industry. Corrosion is a significant cause of equipment failure, leading to costly replacements. The random forest model, a machine learning technique, was developed using climatic and other relevant data to forecast corrosion trends based on selected variables. Design/methodology/approach: The methodology involved four steps: identifying influential factors affecting corrosion, selecting factors based on reliability and accessibility of measurements, applying the machine learning model to predict annual corrosion progression, and comparing the random forest model with other ML models. Results - The results showed that the random forest regression model successfully predicted corrosion rates, indicating an average yearly increase of 2.43% on the analyzed platforms. The main factors influencing this increase were wind speed, percentage of measured corrosion, and platform operating time. Regions with higher incidence of these factors are likely to experience higher corrosion rates, necessitating more frequent maintenance. Limitations of the investigation - The research sample consisted exclusively of 4 platforms located in the offshore region of Rio de Janeiro, Brazil. Thus, the results obtained must be interpreted as representative of these platforms and respective climate conditions. Practical implications – The use of data science tools to improve corrosion management allows managers to have knowledge of which areas has a greater or lesser tendency to corrode, helping to prioritize maintenance activities over time. Originality/value - This study aims to fill gaps regarding the use of random forest techniques for regression focused on predicting the rate of increase in corrosion. It offers a novel approach to assist decision-making in maintenance planning, providing insights into influential corrosion factors and facilitating more effective painting plans to preserve industrial unit integrity.
Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov–Gerasimenko

By using the Rosetta/OSIRIS-NAC data set taken in 2014 August, we focus on the neck region, called Hapi, located on 67P Churyumov–Gerasimenko’s Northern hemisphere. The gravitational potential and slopes of Hapi, coupled with the geological unit identification and the boulder size–frequency distributions, support the interpretation that both taluses and gravitational accumulation deposits observable on Hapi are the result of multiple cliff collapses that occurred at different times. By contrast, the fine-particle deposits observable in the central part of the study area are made of aggregates coming from the Southern hemisphere and deposited during each perihelion passage. Both the consolidated terrains on the western part of Hapi, as well as the centrally aligned ridge made of boulder-like features, suggest that Hapi is in structural continuity with the onion-like structure of the main lobe of 67P. Despite the dusty blanket observable on Hapi, its terrains are characterized by water-ice-rich components that, once repeatedly and rapidly illuminated, sublimate, hence resulting in the strong jet activity observed in 2014 August.
Cache Optimization and Performance Modeling of Batched, Small, and Rectangular Matrix Multiplication on Intel, AMD, and Fujitsu Processors

Factorization and multiplication of dense matrices and tensors are critical, yet extremely expensive pieces of the scientific toolbox. Careful use of low rank approximation can drastically reduce the computation and memory requirements of these operations. In addition to a lower arithmetic complexity, such methods can, by their structure, be designed to efficiently exploit modern hardware architectures. The majority of existing work relies on batched BLAS libraries to handle the computation of many small dense matrices. We show that through careful analysis of the cache utilization, register accumulation using SIMD registers and a redesign of the implementation, one can achieve significantly higher throughput for these types of batched low-rank matrices across a large range of block and batch sizes. We test our algorithm on three CPUs using diverse ISAs – the Fujitsu A64FX using ARM SVE, the Intel Xeon 6148 using AVX-512, and AMD EPYC 7502 using AVX-2, and show that our new batching methodology is able to obtain more than twice the throughput of vendor optimized libraries for all CPU architectures and problem sizes.
Evaluation of International Atomic Energy Agency Technical Report Series-483 Detector-specific Output Correction Factor for Various Collimator Systems

Aim: In this study, a 6MV flattening filter (FF) and 6MV FF Free (FFF) photon beam small-field output factors (OF) were measured with various collimators using different detectors. The corrected OFs were compared with the treatment planning system (TPS) calculated OFs. Materials and Methods: OF measurements were performed with four different types of collimators: Varian Millennium multi-leaf collimator (MLC), Elekta Agility MLC, Apex micro-MLC (mMLC) and a stereotactic cone. Ten detectors (four ionization chambers and six diodes) were used to perform the OF measurements at a depth of 10 cm with a source-to-surface distance of 90 cm. The corrected OF was calculated from the measurements. The corrected OFs were compared with existing TPS-generated OFs. Results: The use of detector-specific output correction factor (OCF) in the PTW diode P detector reduced the OF uncertainty by <4.1% for 1 cm × 1 cm Sclin. The corrected OF was compared with TPS calculated OF; the maximum variation with the IBA CC01 chamber was 3.75%, 3.72%, 1.16%, and 0.90% for 5 mm stereotactic cone, 0.49 cm × 0.49 cm Apex mMLC, 1 cm × 1 cm Agility MLC, and 1 cm × 1 cm Millennium MLC, respectively. Conclusion: The technical report series-483 protocol recommends that detector-specific OCF should be used to calculate the corrected OF from the measured OF. The implementation of OCF in the TPS commissioning will reduce the small-field OF variation by <3% for any type of detector.
Different dose series of human papillomavirus vaccine in young females: a pair-wise meta-analysis and network meta-analysis from randomized controlled trials

Objective To investigate the application value of different dose of HPV vaccine in young females. Data sources The following databases were searched: Cochrane Library, PubMed, Embase, Web of Science, SINOMED, and Wanfang Data, from the establishment of the database to August 1st, 2022. Study eligibility criteria The inclusion criterias were: healthy young women younger than 25 years old as the research object, randomized controlled study as the research type, and the efficacy and safety of single-dose, two-dose or three-dose HPV vaccines as the intervention measures and research endpoints. Study appraisal and synthesis methods Meta-analysis was performed to analyze the protective effects of single-dose, 2-dose and 3-dose HPV vaccine series on young females. Results A total of eight eligible studies involving 16 publications were included. There is no difference in the immunogenicity between the 2-dose and 3-dose series within 12 months after the last dose of HPV vaccine. However, 3-dose series was better than the 2-dose series, which performed better than the single-dose vaccine, after 12 months. With respect to the prevention of HPV16/18 infection or HPV31/33/45 infection, the single-dose vaccine worked better than 2-dose or 3-dose series. Conclusions The present study showed that the immunogenicity of low-dose HPV vaccine was significantly less, but it reduced the risk of high-risk HPV infection. The low-dose HPV vaccine series may not offer a preventive effect on cervical lesions, though it needs to be further confirmed by additional studies.
In vivo Trypanostatic Activity of Tephrosia linearis Extract on Trypanosoma evansi

In vivo antitrypanosomal activity of 70% methanol extract of Tephrosia linearis was evaluated. Mice infected with Trypanosoma evansi in different groups were administered 100, 200, 300 and 400 mg/kg body weight/day of the seventy percent (v/v) (methanol/water) crude extract of T. linearis intraperitoneally. The positive control group was treated with standard drug, berenil, while the negative control was infected and treated with normal saline. Doses of 300 and 400 mg/kg bw i.p. per day were found to significantly reduce the parasite loads and sustained the animals in the respective groups up to 3 and 4 weeks beyond the experimental period. There is drop in the percentage PCV during the first six days of the treatment but this was reversed in the subsequent days, except in the negative control group. The animals administered the highest effective (trypanostatic) dose of 400 mg/kg body weight for five consecutive days prior to infection were observed to develop infection 72 h post inoculation. The LD50 determined was found to be 2800 mg/kg bw. It is obvious that, higher doses of 300 and 400 mg/kg bw has trypanostatic effect. Though, the extract could not show any prophylactic activity, further purification may possibly yield a fraction with trypanocidal effect. Keywords: Tephrosia linearis, Methanol extract, Trypanosoma evansi, Antitrypanosomal activity, In vivo
Virtual Reality Sensor-Based IoT Embedded System for Stress Diagnosis

These instructions give you guidelines for preparing papers for IEEE transactions and journals. Use this document as a template if you are using Microsoft Word 6.0 or later. Otherwise, use this document as an instruction set. The electronic file of your paper will be formatted further at IEEE. Paper titles should be written in uppercase and lowercase letters, not all uppercase. Avoid writing long formulas with subscripts in the title; short formulas that identify the elements are fine (e.g., “Nd–Fe–B”). Do not write “(Invited)” in the title. Full names of authors are preferred in the author field but are not required. Put a space between authors’ initials. The abstract must be a concise yet comprehensive reflection of what is in your article. In particular, the abstract must be self-contained, without abbreviations, footnotes, or references. It should be a microcosm of the full article. The abstract must be between 150 and 250 words. Be sure that you adhere to these limits; otherwise, you will need to edit your abstract accordingly. The abstract must be written as one paragraph, and should not contain displayed mathematical equations or tabular material. The abstract should include three or four different keywords or phrases, as this will help readers to find it. It is important to avoid over-repetition of such phrases as this can result in a page being rejected by search engines. Ensure that your abstract reads well and is grammatically correct.
Synthesis and Characterization of ABA-Type Triblock Copolymers Using Novel Bifunctional PS, PMMA, and PCL Macroinitiators Bearing p-xylene-bis(2-mercaptoethyloxy) Core

Syntheses of novel bifunctional poly(methyl methacrylate) (PMMA)-, poly(styrene) (PS)-, and (poly ε-caprolactone) (PCL)-based atom transfer radical polymerization (ATRP) macroinitiators derived from p-xylene-bis(1-hydroxy-3-thia-propanoloxy) core were carried out to obtain ABA-type block copolymers. Firstly, a novel bifunctional ATRP initiator, 1,4-phenylenebis(methylene-thioethane-2,1-diyl)bis(2-bromo-2-methylpropanoat) (PXTBR), synthesized the reaction of p-xylene-bis(1-hydroxy-3-thia-propane) (PXTOH) with α-bromoisobutryl bromide. The PMMA and PS macroinitiators were prepared by ATRP of methyl methacrylate (MMA) and styrene (S) as monomers using (PXTBR) as the initiator and copper(I) bromide/N,N,N′,N″,N″-pentamethyldiethylenetriamine (CuBr/PMDETA) as a catalyst system. Secondly, di(α-bromoester) end-functionalized PCL–based ATRP macronitiator (PXTPCLBr) was prepared by esterification of hydroxyl end groups of PCL-diol (PXTPCLOH) synthesized by Sn(Oct)2–catalyzed ring opening polymerization (ROP) of ε-CL in bulk using (PXTOH) as initiator. Finally, ABA-type block copolymers, PXT(PS-b-PMMA-b-PS), PXT(PMMA-b-PS-b-PMMA), PXT(PS-b-PCL-b-PS), and PXT(PMMA-b-PCL-b-PMMA), were synthesized by ATRP of MMA and S as monomers using PMMA-, PS-, and PCL-based macroinitiators in the presence of CuBr/PMDETA as the catalyst system in toluene or N,N-dimethylformamide (DMF) at different temperatures. In addition, the extraction abilities of PCL and PS were investigated under liquid–liquid phase conditions using heavy metal picrates (Ag+, Cd2+, Cu2+, Hg2+, Pb2+, and Zn2+) as substrates and measuring with UV-Vis the amounts of picrate in the 1,2–dichloroethane phase before and after treatment with the polymers. The extraction affinity of PXTPCL and PXTPS for Hg2+ was found to be highest in the liquid–liquid phase extraction experiments. Characterizations of the molecular structures for synthesized novel initiators, macroinitiators, and the block copolymers were made by spectroscopic (FT–IR, ESI–MS, 1H NMR, 13C NMR), DSC, TGA, chromatographic (GPC), and morphologic SEM.
Les marchés au comptant et à terme des cacaos en fèves sur la place de Paris : une analyse économique et financière

The objective of this thesis is to study the physical market regarding cocoa and and to appreciate the usefulness relative to the future market of cocoa beans paris. The first part of thesis relative to the physical market describes the great tendencies on the spot market of cocoa and show the instability of the product's prices as well as the failures of the tentatives regarding this subject. The second part of this study whcih shows the usefulness of the future cocoa market in paris relays that the returns of the speculations on the market are on the average close to zero. The effectiveness of the hedging on this market is of poor quality in comparison to results obtained in the rest of the world. However the study of the efficiency of the market shows that it is higly efficient. Finally, the analysis of the effect to the stability of the futures transactions of the future market of cocoa in paris has diminished the flucturations of the spot prices.
Low-Motion Amplitude Operation of Lissajous Frequency Modulated MEMS Gyroscopes for Spurious Harmonics Reduction

This letter discusses and solves a relevant issue for Lissajous frequency modulated microelectromechanical system (MEMS) gyroscopes. Their working principle, under realistic control schemes, implies an undesired generation of spurious tones at twice the modulation frequency, which impairs system stability and bandwidth. A novel sensor design is proposed and coupled to an integrated circuit including an oscillator and a frequency to digital converter. The system is designed such that operation can occur at much smaller motion (down to 300 nm displacement amplitude) without, nevertheless, impairing significantly noise performance. In operation, the system shows a 51-fold reduction of the spurious harmonic while holding sub-10-mdps/√Hz input referred noise.
Control theory of non-linear mechanical systems : a passivity-based and circuit-theoretic approach

1. Fundamentals of robot dynamics 2. Stability of linear feedback control 3. Quasi-natural potential and saturated-position feedback 4. Model-based adaptive control 5. Iterative learning control 6. Nonlinear position-dependent circuits: another language for describing robot dynamics 7. Advanced control for electromechanical systems Appendixes References Index
Constellations of MEO Satellites and Their Observability as Telescopes

A recently introduced large-scale communication-satellite-based radio astronomy system offers several advantages in terms of radio frequency interference, available radio astronomy observation (RAO) bands, bandwidth, and observability. However, a dual-purpose satellite with communication and cosmic radio signal sensing capability incurs a much higher cost than a communication satellite. This problem motivates us to explore hybrid constellations of medium Earth orbit (MEO) satellites consisting of a mixture of single- and dual-purpose satellites to keep the cost low. In particular, we consider six configurations of half dual-purpose MEO (DMEO) satellites where one-half of the satellites are dual purpose and six configurations of quarter DMEO satellites where a quarter of the satellites are dual purpose. Based on the positioning of DMEO satellites on orbital planes, all the considered configurations fall into three general categories, i.e., unilaterally clustered, evenly distributed, and the combination of clustered and distributed configurations. We investigate two representative scenarios of RAO regions for the satellites, namely, the night hemisphere region and the Earth blockage region. We evaluate projected maximum baseline distance and $(u, v)$ coverage of the configurations as they define the angular and spatial resolutions of the interferometric observation by the DMEO telescopes. Our investigation provides interferometric characteristics of the configurations and guidelines for the choice. The most suitable configuration changes with the RAO source direction, performance goal, and RAO region settings. Therefore, it needs to be chosen based on the overall RAO objectives during the lifetime of DMEO satellites.
Mobile phone distraction and its effects on academic performance of Israeli college students

ABSTRACT This article focuses on evaluating the connection between academic achievements and the receipt of text messages. A total of 106 students with ADHD were randomly divided into groups: the ‘Turned off’ (1) (phone is turned off completely); the ‘Enabled & Mute’ (2) (phone is on and the ‘silent mode’ has been activated); the ‘Enabled and Sound’ (3) (phone is on and sound is on). It was found that students’ achievements are affected by the sound mode of the mobile phone; that turning off the phone significantly increases the number of correct answers; and that students with ADHD tend to be more easily distracted by the sound than their peers. Within this framework, participants in group 1 scored a significantly higher number of correct answers and were more successful in answering complex questions compared to the participants in group 3.
Characteristics of ICU and Operating Room Patients at Satellite Hospitals Study Program Anesthesiology and Intensive Care Faculty of Medicine Universitas Sumatera Utara

Characteristics patient of admission to the intensive care unit and operating room are needed for better team development and achievement competence. The purpose of this study was to describe the characteristics of critical patients in the intensive critical unit and operating room. This research method is quantitative with a descriptive design using secondary data. The data were obtained from the medical records of the ICU of the public hospitals in Sibolga City, Central Tapanuli Regency and Padangsidempuan City. The results of research in the ICU showed that the majority of critical patients were female (51.17%), aged 56-65 years (25.76%), primary diagnoses of disorders of the neurological system (24.36%), and the patient's prognosis moved to the emergency room. treated or referred (61.31%). The results of the study in the operating room found that the majority of the sexes were male (54.20%), the largest sample aged 56-65 years (31.52). The most common surgical procedures were surgery on the nervous system (42, 86). The prognosis of patients after surgery is that more patients are transferred to the ward or ICU (57.14%) However, further research is needed on other characteristics to provide a more comprehensive understanding.
Circularly polarized antenna using ground-mode tuning technique for small-sized IoT devices

ABSTRACT This study focuses on the generation of circular polarization (CP) in a small-sized ground plane by using ground-mode tuning (GMT) technique. The proposed antenna is composed of two branches, so that it can simultaneously excite two orthogonal modes of the ground plane for radiation. Two metal strips at the ends of the ground plane are adopted as GMT structures, and the dominant modes along the length and width of the ground plane can be controlled by tuning the property of the shorting pins, conveniently. Both simulation and measurement results indicate that the proposed technique can achieve a wideband impedance bandwidth and a sufficient AR bandwidth. Furthermore, the proposed CP antenna provides a less directive radiation pattern compared to a linearly-polarized antenna, which can be attractive in receiving performance.
The decomposition of tourism demand and tourism receipts

We examine the effect of the decomposition of tourist demand on tourism receipts. We find that tourists from OECD economies or from countries that have strong trade connections with the host economy tend to spend more money in emerging economies. However, tourists from countries that have sociocultural or geographic linkages, such as sharing the same border, having the same religion or language, or have the same ethnicity as those in the host country, tend to spend less money.