Miracle-dz/UniFAR-FTUs huggingface dataset:
A survey of mental health status of obstetric nurses during the novel coronavirus pneumonia pandemic

Abstract To investigate the mental health status of obstetric nurses and its influencing factors during the novel coronavirus epidemic period, so as to provide theoretical reference for hospital decision-makers and managers. From February 25 to March 20, 2020, we conducted a cross-sectional survey through online questionnaire, and selected obstetric nurses from Jilin and Heilongjiang Provinces as the research objects by convenience sampling. Three hundred eighteen valid questionnaires were collected; the results of Symptom Checklist 90 showed that the scores of “obsessive-compulsive”, “depression”, “anxiety”, “hostility”, “phobia”, and “psychosis” were higher than the Chinese norm (P < .01). There were 107 people whose total score of Symptom Checklist 90 was more than 160, and 83 people whose number of positive items was more than 43. Logistic regression results showed that married, temporary employment, lack of support and communication from family and relatives, onerous task, and unbearable responsibility were independent risk factors for mental disorder. There is a great psychological burden for obstetric nurses during the epidemic period. Decision makers should focus on necessary psychological intervention for those that are married, temporarily employed, and those lacking family supports including communication. At the same time, managers should distribute tasks reasonably to avoid psychological burdens caused by overwork.
HaptoMapping: Visuo-Haptic Augmented Reality by Embedding User-Imperceptible Tactile Display Control Signals in a Projected Image

This article proposes HaptoMapping, a projection-based visuo-haptic augmented reality (VHAR) system, that can render visual and haptic content independently and present consistent visuo-haptic sensations on physical surfaces. HaptoMapping controls wearable haptic displays by embedded control signals that are imperceptible to the user in projected images using a pixel-level visible light communication technique. The prototype system is comprised of a high-speed projector and three types of haptic devices—finger worn, stylus, and arm mounted. The finger-worn and stylus devices present vibrotactile sensations to a user's fingertips. The arm-mounted device presents stroking sensations on a user's forearm using arrayed actuators with a synchronized hand projection mapping. We identified that the developed system's maximum latency of haptic from visual sensations was 93.4 ms. We conducted user studies on the latency perception of our VHAR system. The results revealed that the developed haptic devices can present haptic sensations without user-perceivable latencies, and the visual-haptic latency tolerance of our VHAR system was 100, 159, 500 ms for the finger-worn, stylus, and arm-mounted devices, respectively. Another user study with the arm-mounted device discovered that the visuo-haptic stroking system maintained both continuity and pleasantness when the spacing between each substrate was relatively sparse, such as 20 mm, and significantly improved both the continuity and pleasantness at 80 and 150 mm/s when compared to the haptic only stroking system. Lastly, we introduced four potential applications in daily scenes. Our system methodology allows for a wide range of VHAR application design without concern for latency and misalignment effects.
A Class of Broadband Three-Port TEM-Mode Hybrids

The three-port hybrid considered in this paper is useful both as a power divider and power combiner. In the divider application, power entering the input port is split equally and with zero phase difference between the output ports. All ports are well matched and the output ports are highly isolated. The generalized form of the hyhrid circuit is a T junction followed by a multiplicity of cascaded pairs of TEM line lengths and interconnecting resistors. Due to symmetry, the resistors are decoupled from the input port, but they serve an essential function in providing output-port match and isolation. Each pair of lines and its associated resistor are referred to as a section. The one-section hybrid has been known and widely used. Its usable bandwidth is f/sub 2/ / f/sub 1/ =1.44:1 for VSWR 20 dB. This paper shows that additional sections can provide a large increase in bandwidth. Some of the examples treated are as follows: two sections, f/sub 2/ / f/sub 1/ =2, VSWR 27 dB; four sections, f/sub 2/ / f/sub 1/ =4, VSWR 26 dB; and seven sections, f/sub 2/ / f /sub 1/ =10, VSWR 19 dB. Exact design formulas are given for two-section hybrids, and approximate design formulas for three or more sections.
An application for classifying perceptions on my health bank in Taiwan using convolutional neural networks and web-based computerized adaptive testing

Supplemental Digital Content is available in the text Abstract Background: The classification of a respondent's opinions online into positive and negative classes using a minimal number of questions is gradually changing and helps turn techniques into practices. A survey incorporating convolutional neural networks (CNNs) into web-based computerized adaptive testing (CAT) was used to collect perceptions on My Health Bank (MHB) from users in Taiwan. This study designed an online module to accurately and efficiently turn a respondent's perceptions into positive and negative classes using CNNs and web-based CAT. Methods: In all, 640 patients, family members, and caregivers with ages ranging from 20 to 70 years who were registered MHB users were invited to complete a 3-domain, 26-item, 5-category questionnaire asking about their perceptions on MHB (PMHB26) in 2019. The CNN algorithm and k-means clustering were used for dividing respondents into 2 classes of unsatisfied and satisfied classes and building a PMHB26 predictive model to estimate parameters. Exploratory factor analysis, the Rasch model, and descriptive statistics were used to examine the demographic characteristics and PMHB26 factors that were suitable for use in CNNs and Rasch multidimensional CAT (MCAT). An application was then designed to classify MHB perceptions. Results: We found that 3 construct factors were extracted from PMHB26. The reliability of PMHB26 for each subscale beyond 0.94 was evident based on internal consistency and stability in the data. We further found the following: the accuracy of PMHB26 with CNN yields a higher accuracy rate (0.98) with an area under the curve of 0.98 (95% confidence interval, 0.97–0.99) based on the 391 returned questionnaires; and for the efficiency, approximately one-third of the items were not necessary to answer in reducing the respondents’ burdens using Rasch MCAT. Conclusions: The PMHB26 CNN model, combined with the Rasch online MCAT, is recommended for improving the accuracy and efficiency of classifying patients’ perceptions of MHB utility. An application developed for helping respondents self-assess the MHB cocreation of value can be applied to other surveys in the future.
Cleft Size and Success of Secondary Alveolar Bone Grafting—A Systematic Review

Objective This study aimed to review all research evidence of presurgical cleft size and related factors to success of secondary alveolar bone grafting (SABG). Design and Setting The systematic review searched the OVID-Medline®, PubMed®, Embase®, and Cochrane Central Register of Controlled Trials (CENTRAL) up to August 2020. Two reviewers independently selected potential abstracts for full review. Disagreeements were resolved by consensus. The first author extracted data and assessed the risk of bias using Risk of Bias in Non-randomized studies—of Interventions tool. Patients and Interventions Patients with non-syndromic clefts who received SABG were selected. Presurgical cleft size/volume and treatment results must be available. Main Outcome Measures Level of the grafted bone, achievement of orthodontic tooth movement into the grafted area, need for re-operation. Results From 962 abstracts, 23 publications were included. Mean cleft width was 6.80 ± 1.98 mm, cleft area 20–240 mm2, and mean volume 0.89 ± 0.33 cm3. No definite conclusion was achieved on whether a narrow or wide cleft showed better treatment outcomes, but other potentially related factors were good oral hygiene and eruptive force of the maxillary canines. Lack of a standard definition of cleft size, a small sample size, varying outcome parameters, and moderate-to-high risk of bias contributed to the summary. A meta-analysis could not be performed because of the heterogeneity. Conclusion Due to insufficient evidence, cleft width/volume could not be specified leading to more successful SABG. Care of patients could be improved in both research by following rigorous methodology, and practice by clear communication.
Risk factors for obstructive sleep apnea in cystic fibrosis

Despite emerging data that suggest a high frequency and severity of obstructive sleep apnea (OSA) among patients with cystic fibrosis (CF), few of them are referred for polysomnography. Little is known about which patients with CF are at increased risk for OSA and which sleep symptoms merit investigation.
The Management of the Open Abdomen - A Literature Review.

An essential component of the concept of "Damage control surgery", laparostomy is the procedure by which the abdomen is deliberately abandoned open, the visceroperitoneal contents being temporarily protected by multiple technical means. Actual classification: Grade 1, without viscero-parietal adhesions or fixity of the abdominal wall (lateralization), divided into: 1A clean, 1B contaminated and 1C enteral fistula -cutaneous skin is considered clean); Grade 2, which develops fixation is subdivided into: 2A clean, 2B contaminated and 2C enteral fistula; Grade 3, "frozen abdomen", is divided into: 3A clean and 3B contaminated; Grade 4, defined as enteroatmospheric fistula, is a permanent fistula associated with the presence of granulation tissue and a frozen abdomen. Indications of the open abdomen are: damage control surgery, abdominal compartment syndrome, peritonitis, severe acute pancreatitis, vascular emergencies. Temporary abdominal closure may be achieved by following methods: skin only closure, Ã¢? Bogota bagÃ¢? Â, opsite Sandwich technique, absorbable mesh, non-absorbable mesh or commercial zipper, vaccum asisted closure, each with its own advantages and disadvantages. Regarding the definitive closure this can be achieved by non mesh and mesh mediated techniques. Component separation technique anterior and posterior should be considered the elective repair procedure in parietal defects after laparostomy. Although several studies have been published, there is still no consensus in the literature on the positioning of prosthetic material in relation to parietal planes. Some authors suggest better results (relative to the rate of recurrence and complications) for implantation in the "sublay" position. Open abdomen is an important tool in the arsenal of the emergency surgery. Classification, indications, methods of temporary abdominal closure are evolving, as well as management of enterocutaneous fistulas and fascial closure, therefore permanent update is neccessary to offer patients the best care.
UNWANTED ISLAND MAINTAINING IN LV GRIDS: ANALYSIS AND POSSIBLE SOLUTIONS. A STUDY BASED ON THE REAL-TIME DIGITAL SIMULATOR

Islanding refers to the condition in which one or m ore distributed generators continue to power a section of the network even though grid power from the electric u tility is no longer present. Unwanted islanding can be danger ous to utility workers, who may not realize that a circuit is still powered. Furthermore, because the present electrica l systems are not designed to work under these condit ion, the unwanted isle is uncontrolled with reference to protection system in case of fault, rated values of voltage and frequency. Finally, reclosing the circuit onto an active island may cause problems with the utility's equipm ent. For that reason, a smart grid must prevent islandin g or detect it and immediately clear the situation. In this work the unwanted island generation and maintaining are analyzed for a 4-wires LV grid c by a mix of generators and loads. Both single-phase and three-phase generators are considered, in order to have an unbalanced grid with realistic topology. Analysis i s performed using the Real-Time Digital Simulator (RT DS) installed in the Enel Test Center of Milan. The purpose of this work is to evaluate the real ri sk of islanding, analyzing different scenarios and taking into account transitory phenomena and capability limits of generators.
El riesgo y la falta de políticas de seguridad informática una amenaza en las empresas certificadas BASC

This essay focuses on paragraph 7 of the safety standards of the BASC norm, which mentions security in information technology (password protection, accountability and protection for systems and data). The theme focuses on developing the problems that entails not have policies, procedures and / or rules of computer security companies certified BASC. The protection of data, documents and control access to information is an issue that every day takes more strength in large companies due to the different specialties of hackers and crackers to steal vital information.
Biased Orientation and Color Tuning of the Human Visual Gamma Rhythm

Narrowband γ oscillations (NBG: ∼20-60 Hz) in visual cortex reflect rhythmic fluctuations in population activity generated by underlying circuits tuned for stimulus location, orientation, and color. A variety of theories posit a specific role for NBG in encoding and communicating this information within visual cortex. However, recent findings suggest a more nuanced role for NBG, given its dependence on certain stimulus feature configurations, such as coherent-oriented edges and specific hues. Motivated by these factors, we sought to quantify the independent and joint tuning properties of NBG to oriented and color stimuli using intracranial recordings from the human visual cortex (male and female). NBG was shown to display a cardinal orientation bias (horizontal) and also an end- and mid-spectral color bias (red/blue and green). When jointly probed, the cardinal bias for orientation was attenuated and an end-spectral preference for red and blue predominated. This loss of mid-spectral tuning occurred even for recording sites showing large responses to uniform green stimuli. Our results demonstrate the close, yet complex, link between the population dynamics driving NBG oscillations and known feature selectivity biases for orientation and color within visual cortex. Such a bias in stimulus tuning imposes new constraints on the functional significance of the visual γ rhythm. More generally, these biases in population electrophysiology will need to be considered in experiments using orientation or color features to examine the role of visual cortex in other domains, such as working memory and decision-making. SIGNIFICANCE STATEMENT Oscillations in electrophysiological activity occur in visual cortex in response to stimuli that strongly drive the orientation or color selectivity of visual neurons. The significance of this induced “γ rhythm” to brain function remains unclear. Answering this question requires understanding how and why some stimuli can reliably generate oscillatory γ activity while others do not. We examined how different orientations and colors independently and jointly modulate γ oscillations in the human brain. Our data show that γ oscillations are greatest for certain orientations and colors that reflect known response biases in visual cortex. Such findings complicate the functional significance of γ oscillations but open new avenues for linking circuits to population dynamics in visual cortex.
A GaAs MISFET Using an MBE-Grown CaF2 Gate Insulator Layer

A GaAs MISFET with a single crystalline CaFl insulator layer has been successfully fabricated for the first time. The CaF2 layer and an undoped GaAs channel layer are grown by molecular beam epitaxy (MBE) on a semi-insulating GaAs (100) substrate. The two layers are grown sequentially inside the same MBE chamber in order to form a clean CaF,/GaAs interface. A self-aligned process using a WSi,-gate metal is applied to fabricate the present MISFET. A I-pm gate length FET exhibiting a transconductance of 64 mS/mm has been achieved. I. INTRODUCTION lGaAs/GaAs heterostructure FET's with high-mobility A two-dimensional electron gas have attracted increasing attention because they are promising devices for high-speed and low-power integrated circuit applications ( 11. In these FET's, the conduction band discontinuity AEc between AlxGal -xAs and GaAs, being 0.3 eV for X = 0.3, is used as a potential barrier. This barrier is not high enough that gate leakage current increases seriously if the thickness of the AlGaAs gate insulator layer is less than 10 nm (2). Since reducing the thickness of the gate insulator layer is essential to achieve higher transconductance as well as smaller device size, it is necessary to investigate a gate insulator material that provides a higher potential barrier with GaAs than AlxGal -xAs. The material must have a wider energy gap and a smaller electron affinity than AlxGal-xAs. However, many attempts to realize GaAs MISFET's have shown that conventional dielectric materials, such as Si02 and Si3N4, are not suitable (3). This is due to the high interface state density, caused by native oxide, contamination, and various kinds of intrinsic defects, found in dielectric/GaAs interfaces. In this letter, a new type of single crystalline insulator material is investigated. Group IIA fluorides, such as CaF2 and SrF2, can be grown on GaAs substrates by molecular beam epitaxy (MBE) (4), (5). These materials are believed to be worthy of careful scrutiny for device application, because sequential MBE growth of GaAs and fluorides holds out the possibility of an interface with virtually no contamination. In addition, the ability to precisely control the MBE process enables us to prepare the interface within an accuracy of a few monolayers and to develop a new technology of interface engineering. In order to verify this approach, CaF2 and GaAs have been grown by MBE on a GaAs substrate and MISFET's using the CaFz gate insulator layer have been fabricated for the first time. The FET performance for a device with a l-pm-
Deep Listwise Triplet Hashing for Fine-Grained Image Retrieval

Hashing is a practical approach for the approximate nearest neighbor search. Deep hashing methods, which train deep networks to generate compact and similarity-preserving binary codes for entities (e.g. images), have received lots of attention in the information retrieval community. A representative stream of deep hashing methods is triplet-based hashing that learns hashing models from triplets of data. The existing triplet-based hashing methods only consider triplets that are in the form of <inline-formula> <tex-math notation="LaTeX">$(q,q^{+},q^{-})$ </tex-math></inline-formula>, where <inline-formula> <tex-math notation="LaTeX">$q$ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$q^{+}$ </tex-math></inline-formula> are in the same class and <inline-formula> <tex-math notation="LaTeX">$q$ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$q^{-}$ </tex-math></inline-formula> are in different classes. However, the number of possible triplets is approximately the cube of training examples, triplets used in the existing methods are only a small fraction of all possible triplets. This motivates us to develop a new triplet-based hashing method that adopts many more triplets in training phase. We propose Deep Listwise Triplet Hashing (DLTH) that introduces more triplets into batch-based training and a novel listwise triplet loss to capture the relative similarity in new triplets. This method has a pipeline of two steps. In Step 1, we propose a novel way to generate triplets from the soft class labels obtained by knowledge distillation module, where the triplets in the form of <inline-formula> <tex-math notation="LaTeX">$(q,q^{+},q^{-})$ </tex-math></inline-formula> are a subset of the newly obtained triplets. In Step 2, we develop a novel listwise triplet loss to train the hashing network, which seeks to capture the relative similarity between images in triplets according to soft labels. We conduct comprehensive image retrieval experiments on four benchmark datasets. The experimental results show that the proposed method has superior performances over state-of-the-art baselines.
Odometry Aspects of an Omni-Directional Mobile Robot with Modified Mecanum Wheels

Mobile robots have a large scale use in industry, military operations, exploration and other applications where human intervention is risky. When a mobile robot has to move in small and narrow spaces and to avoid obstacles, mobility is one of its main issues. An omni-directional drive mechanism is very attractive because it guarantees a very good mobility in such cases. Also, the accurate estimation of the position is a key component for the successful operation for most of autonomous mobile robots. In this work, some odometry aspects of an omni-directional robot are presented and a simple odometer solution is proposed.
Plasmonic Optoelectronic Memristor Enabling Fully Light‐Modulated Synaptic Plasticity for Neuromorphic Vision

Exploration of optoelectronic memristors with the capability to combine sensing and processing functions is required to promote development of efficient neuromorphic vision. In this work, the authors develop a plasmonic optoelectronic memristor that relies on the effects of localized surface plasmon resonance (LSPR) and optical excitation in an Ag–TiO2 nanocomposite film. Fully light‐induced synaptic plasticity (e.g., potentiation and depression) under visible and ultraviolet light stimulations is demonstrated, which enables the functional combination of visual sensing and low‐level image pre‐processing (including contrast enhancement and noise reduction) in a single device. Furthermore, the light‐gated and electrically‐driven synaptic plasticity can be performed in the same device, in which the spike‐timing‐dependent plasticity (STDP) learning functions can be reversibly modulated by visible and ultraviolet light illuminations. Thereby, the high‐level image processing function, i.e., image recognition, can also be performed in this memristor, whose recognition rate and accuracy are obviously enhanced as a result of image pre‐processing and light‐gated STDP enhancement. Experimental analysis shows that the memristive switching mechanism under optical stimulation can be attributed to the oxidation/reduction of Ag nanoparticles due to the effects of LSPR and optical excitation. The authors' work proposes a new type of plasmonic optoelectronic memristor with fully light‐modulated capability that may promote the future development of efficient neuromorphic vision.
Mesopic visual efficiency III: Discrimination threshold measurements

The authors represent a research consortium which has adopted a task performance based approach for nighttime driving to obtain mesopic spectral sensitivity functions. This study describes investigations based on discrimination threshold techniques and compares the results with those obtained from detection threshold measurements. It forms a continuation of `Mesopic models — from brightness matching to visual performance in night-time driving: a review'. 1 The achromatic increment contrast threshold for discrimination of a quasi-static target represents the ability to correctly identify a target which has low contrast with the background and is therefore a highly relevant visual task in the context of nighttime driving. The psychophysical experiments reported here are carried out in the laboratory and in dynamic nighttime driving tests. The spectral sensitivity functions resulting from the discrimination threshold contrast investigations show a significant contribution from the colour-opponent (or chromatic) channels of the visual system. Similar features have been observed in results from investigations using detection threshold techniques.