Miracle-dz/UniFAR-FTUs huggingface dataset:
Campus Learning Mutual Aid Platform Based on O2o Model

: With the popularization of smart handheld terminals such as smart phones and tablet computers, the mobile learning model has become one of the directions for future education development. The “Progress and Worry-Free” App is a learning mutual aid platform for college students, which allows students to combine learning with social interaction, without losing sight of one another. The platform mainly uses the construction of O2O business model to provide college students with C2C and B2C multiple service methods, create their own spiritual home for college students in the Internet era, and establish online-offline, offline-online learning mutual assistance channels. The App design of the product platform is divided into two versions: IOS system and Android system. In order to facilitate the login, it can also be connected with the WeChat applet. The interface design is guided by a simple and clear style, and is divided into three parts: user center, product function and software feedback. Campus students find like-minded students to make progress together through the App platform; the App platform introduces academic masters, specialized research groups, and scientific research teams with technical expertise as a platform for business display. Through mutual help and mutual assistance in professional skills, college students complete efficient and useful social interactions, thereby improving the overall academic and scientific research level of the campus.
Feedforward Optimal Control with Stabilizing Optimal Trajectory Tracking to Emulate Human Motor Control

This paper proposes a human-inspired walking controller consisting of a feedforward optimal term and a feedback stabilizing term. The feedforward term is the optimal control input as calculated from the dynamics using trajectory optimization via direct collocation. The feedforward optimal control is analogous to walking muscle synergies in humans, which are the learned muscle contraction patterns that humans use during walking. The feedback term involves tracking the deviation from the optimal joint trajectories with a PD controller, and this term can be seen as approximating the stability which comes from co-contraction and natural stiffness and damping in human joints. This hybrid controller mimics human motor control in the hopes of obtaining some of the robustness of human walking, and it aims to offset the disadvantages of using feedforward or feedback alone. Feedback mitigates the sensitivity of feedforward to minor perturbations. Feedforward combats the vulnerability of feedback to sensor noise and allows lower feedback gains to be used, since the motion of the biped is no longer entirely reliant on the feedback term. Preliminary results using this controller in the simulation of a five-link biped are presented, in which the proposed controller is compared to a feedback linearizing controller when subjected to an impulse perturbation.
Indigestible neutral detergent fiber evaluation with incubation in different species

We aimed to evaluate indigestible neutral detergent fiber (iNDF) feed concentration after cattle, goat, and sheep ruminal incubation, compare results with different estimate methods and connect with chemical analysis data. Four forages (corn silage, sugarcane, Brachiaria decumbens cv. Marandu, and Panicum maximum cv. Tanzânia), two concentrates (ground corn and soybean meal), a by-product (soybean hull), and three fecal samples (cattle, goat, and sheep) were incubated in Nellore steers, dry Saanen goats and Santa Inês sheep. Animals were previously adapted to the experimental diet for eight days, and incubation was performed for 240 hours. The concentration of iNDF was higher when samples were incubated in goat rumen compared with samples incubated in the rumen of cattle. Sheep ruminal incubation increased forages and tended to increase concentrate and by-product iNDF concentration, relative to cattle ruminal incubation. Moreover, sheep and goat ruminal incubation result in similar feed iNDF concentration. Besides, cattle feces had a higher level, and goat feces had lower iNDF levels than sheep feces. The CNCPS underestimated iNDF feed concentration. Estimates of uNDF from Conrad et al. (1984) were lower than iNDF level of sugarcane and higher than iNDF level of P. maximum and concentrates. In general, lignin concentration was the primary composition data related to the iNDF level. However, ADF was the best for forages (R2 = 0.668), and NDF was better for concentrates (R2 = 0.454). In conclusion, digestive process of different species affects iNDF feed concentration. The bias of models was considerable, and feed characteristics affect chemical composition and iNDF level.
Energy conservation of bio-nanofluids past a needle in the presence of Stefan blowing : lie symmetry and numerical simulation

Thermal energy management associated with the transmission of heat is one of the main problems in many industrial setups (e.g. pharmaceutical, chemical and food) and bio-engineering devices (e.g. hospital ventilation, heating, cooling devices, heat exchanger and drying food, etc). The current study aims to examine thermo-bioconvection of oxytactic microorganisms taking place in a nanofluid-saturated needle with the magnetic field. Stefan-blowing is applied. The leading equations of continuity, momentum and energy, species transport equations for oxygen concentration and population density of microorganisms are reduced dimensionless and Lie symmetry group transformations are used to generate appropriate invariant transformations. The resulting similarity boundary value problem (in which the blowing parameter is coupled with concentration) have been simulated using MATLAB (2015a) bvp5c built in function. The impact of the emerging factors on the nondimensional velocity, temperature, nanoparticle concentration and motile microorganism density functions and their slopes at the wall, are pictured and tabulated. Justification with published results are included. It is found that all physical quantities decrease with Stefan blowing and increase with power law index parameter. With elevation in magnetic field parameter i.e., Lorentzian drag force, the friction factor reduces while the local Nusselt number, local Sherwood number, and the local motile microorganism density wall gradient increase. Present study could be used in food and pharmaceutical industries, chemical processing equipment, fuel cell technology, enhanced oil recovery, etc.
Gender Identity and Relative Income within Households: Evidence from China

How does conforming to traditional gender roles affect women’s labour outcomes? To investigate this question, we use the discontinuity test and fixed effect regression with the time lag to measure how married women in China diminish their labour outcomes and maintain the breadwinning status of their husbands. In the first part of the research, the discontinuity test exhibits the missing mass of married women who just earn more than husbands, and we take it as evidence that these women are diminishing their earnings under the influence of gender norms. In the second part of the research, we use fixed effect regression with time lag to assess the change of labour outcomes in the future if a woman currently earns more than husband. Our results suggest that it will not affect women’s labour participation decisions, yet women would reduce their yearly incomes and weekly working hours in the future. Heterogeneous studies are conducted to show that low-income and less educated married women are more susceptible to the influence of gender norms. JEL Codes: D10, J12, J16.
Impedance Control of the Knee Mechanism of a Transfemoral Prosthetic for Level Walking

Introduction Powered prosthetics have been shown to increase a user’s walking efficiency and enable higher walking speeds in comparison to the non-powered counterparts. Yet, powered prosthetics suffer from lack of use owing to poor kinematic compatibility, bulkiness, and low adaptability to changes in the terrain. Additionally, current powered prosthetics mandate tedious calibration and tuning procedures, which prohibit their general usage. A possible approach to some of these problems is to focus on improving user-comfort by replicating able-bodied walking with such prosthetics. Many researchers have done this by adopting impedance control strategies. Under this control scheme, the gait is generally divided into 4-6 phases with a unique set of constant impedance control parameters—stiffness, damping, and equilibrium angles—assigned to each phase [1]. But studies such as [2] have revealed that a healthy human’s joint impedance varies continuously throughout the stance phase of the gait cycle. Since the objective of a prosthetic’s controller is to mimic able-bodied walking, it stands to reason that control parameters must also be human-inspired. Studies such as [3] have implemented algebraic curves within some phases of the control scheme. While the parameters vary continuously and smoothly within the phases, there are likely non-smooth variations during transitions between phases. Further, the controller proposed in [3] relies on a load cell that measures vertical ground reaction force. Such load cells can be expensive and increase the prosthetic’s weight. A prior study by the authors proposes an impedance control scheme that varies the impedance parameters continuously and smoothly throughout the stance phase of the gait cycle [4]. Unlike [3], this scheme does not rely on a load cell. The impedance parameters are estimated using a least squares approach like that used in [1]. In the study, [4], the proposed controller was only implemented on a transfemoral prosthetic’s ankle joint. This paper documents preliminary attempts at extending the control scheme to the prosthetic’s knee joint.
EVALUATION OF PHARMACEUTICAL POTENTIAL AND PHYTOCHEMICAL ANALYSIS OF SELECTED TRADITIONAL LICHEN SPECIES

Lichens have been commonly used in traditional medicine. Biological potential (anti-proliferative, antioxidant and anti-bacterial) and chemical content of five lichen species (E. divaricata, L. vulpina, L. pulmonaria, R. fraxinea and U. florida) were assessed in relation to traditional knowledge. Consistent with folkloric usage, the strongest anti-proliferative activity was observed with L. pulmonaria against human hepatocellular carcinoma (HepG2/C3A) cell line. L. pulmonaria also showed the highest antioxidant capacity. While E. divaricata had the most phenolic content, the highest flavonoid content was determined in L. pulmonaria. All lichen extracts showed the best antibacterial activity against Gram-positive bacteria and only R. fraxinea had a broad spectrum of antibacterial activity. HPLC-DAD analysis revealed that L. pulmonaria and U. florida were the best sources of stictic acid and usnic acid, respectively. Traditional usages of tested lichens were justified with this study and nutraceutical potentials of them were revealed.
Sand Lizards Lacerta agilis Linaeus, 1758 (Lacertidae) as Hosts for Tick-borne Pathogens in the Wielkopolska National Park, Poland

The incidence of tick-borne diseases has increased in recent years. Studies on sand lizards have demonstrated that they carry a number of acarid species. The purpose of this study was to identify the transmissible pathogenic organisms in Ixodes ricinus removed from Lacerta agilis in the Wielkopolska National Park in 2015. The ticks were identified using a stereomicroscope and by comparing with taxonomical descriptions. Isolation of DNA was performed using a Modified Genomic Maxi AX Direct. The primers used were those used for the detection of haemoparasites transmitted by ticks. In total, 56 nymphs and 34 larvae were removed from 15 of 47 examined lizards (overall tick prevalence 31.9%). Larvae and nymphs of Ixodes ricinus were found on 12 lizards. The highest tick burden was 14 (nymphs). Successful PCR amplicons were from Rickettsia spp. These mono-specific infections did not allow analysis of interactions between co-occurring pathogens. It is clearly necessary to extend this work targeting a much larger sample size of sand lizards and to combine this with concurrent sampling of blood from lizards.
The Diagnostic Deceiver: Radiological Pictorial Review of Tuberculosis

Tuberculosis (TB) is a bacterial infection with Mycobacterium tuberculosis; it is a public health problem worldwide and one of the leading causes of mortality. Since December 2019, the COVID-19 pandemic has created unprecedented health challenges and disrupted the TB health services, especially in high-burden countries with ever-increasing prevalence. Extrapulmonary and even pulmonary TB are an important cause of nonspecific clinical and radiological manifestations and can masquerade as any benign or malignant medical case, thus causing disastrous conditions and diagnostic dilemmas. Clinical manifestations and routine laboratory tests have limitations in directing physicians to diagnose TB. Medical-imaging examinations play an essential role in detecting tissue abnormalities and early suspecting diagnosis of TB in different organs. Radiologists and physicians should be familiar with and aware of the radiological manifestations of TB to contribute to the early suspicion and diagnosis of TB. The purpose of this article is to illustrate the common radiologic patterns of pulmonary and extrapulmonary TB. This article will be beneficial for radiologists, medical students, chest physicians, and infectious-disease doctors who are interested in the diagnosis of TB.
Effect of Thickness Nonuniformity of Resonator on the HRG Accuracy

For the HRG's technology fabrication deviation,effect of the resonator's thickness nonuniformity on the gyro accuracy is studied.The error model is established and the error mechanism is analyzed.First,the strains of an arbitrary point on the resonator is analyzed,then a thin shell element is chosen to make a force analysis,the dynamics equation is established according to the force and torque equilibrium equation.According to the dynamics equation,the HRG error caused by the resonator's thickness nonuniformity is obtained.The results show that the first to third order harmonic terms of the nonuniformity have no impact on the error of angular rate,while the fourth order harmonic terms has impact on the error of angular rate.In order to improve HRG accuracy,some methods are adopted to balance the thinckness nonuniformity.
Coping Strategies in Elderly Colorectal Cancer Patients

Simple Summary Coping strategies help to mitigate the impact of a situation on an individual’s life. Elderly patients that undergo the stressful situation of going through colorectal cancer are no exception. This systematic review describes the improvement of the quality of life of patients who applied coping strategies to their situation. The results expose that coping strategies helped these patients to adapt and overcome the disease’s stressful scenarios. Abstract In Spain, 34,331 new cases of colorectal cancer were diagnosed in 2018 and 15,923 individuals died from this disease in the same year. The highest incidence of colorectal cancer is among individuals aged 65–75 years and the physiological consequences of aging, alongside the effects of the disease and its treatment, can exacerbate their physical deterioration and cognitive impairment and reduce their social relationships. The learning of coping strategies may help to improve the quality of life of patients after cancer diagnosis. To test the hypothesis that the utilization of coping strategies can improve the quality of life of elderly patients with colorectal cancer, PubMed and EBSCO databases were searched, up to 2021, using the following terms: “coping strategies and colorectal cancer” with “anxiety”, “quality of life”, “depression”, “unmet needs”, “optimism”, “intimacy”, “distress”, “self-efficacy” and “self-esteem” with Boolean operators “AND”, “OR”. The literature search retrieved 641 titles/abstracts written in English. After an exhaustive analysis, only 7 studies met the inclusion criteria. Randomized evidence was scant and was reported only in 3/7 of the studies analyzed. Data from available randomized evidence support that patients improved on their depression and quality of life and felt more prepared to deal with their cancer. Coping strategies in patients with colorectal cancer were effective in improving patient adaptation to their new situation. Healthcare professionals working with these patients should receive training in this complementary treatment, to be able to conduct comprehensive care in order to improve the quality of life of these patients.
Predominant Single Stable VpmaV Expression in Strain GM139 and Major Differences with Mycoplasma agalactiae Type Strain PG2

Simple Summary MALDI-ToF MS analysis demonstrates major differences between Mycoplasma agalactiae type strain PG2 and strain GM139. Evaluation of the Vpma (variable proteins of M. agalactiae) phenotypic profiles of these two strains reveals that unlike PG2, GM139 expresses a single Vpma, namely VpmaV, and without any visible phase variation. Although the presence of only one Vpma seems to be sufficient for the pathogenesis of the GM139 strain, the absence of phase variation can compromise immune system evasion and spread to other anatomical sites in the host. Abstract Although mycoplasmas have a reduced genome and no cell wall, they have important mechanisms for the antigenic variation in surface lipoproteins that modulate their interactions with the host. Mycoplasma agalactiae, the main etiological agent of contagious agalactia, has a multigene family involved in the high-frequency phase variation in surface lipoproteins called variable proteins of M. agalactiae (Vpmas). The Vpma lipoproteins are involved in the immune evasion, colonization, dissemination, and persistence of M. agalactiae in the host. In this paper, we evaluate the Vpma phenotypic profiles of two different strains of M. agalactiae, namely, GM139 and the type strain PG2, to assess possible correlations between Vpma phase variability and the geographic localization, animal origin, and pathogenicity of these two strains. Using monospecific Vpma antibodies against individual Vpmas in immunoblots, we demonstrate that, unlike PG2, which expresses six Vpma proteins with high-frequency phase variation, colonies of GM139 predominantly express VpmaV and do not exhibit any sectoring phenotype for any Vpma. Since VpmaV is one of the most important Vpmas for cell adhesion and invasion, its predominant sole expression in GM139 without high-frequency variation may be the basis of the differential pathogenicity of GM139 and PG2. Additionally, MALDI-ToF MS analysis also demonstrates significant differences between these two strains and their relatedness with other M. agalactiae strains.
Design, Computational Modelling and Experimental Characterization of Bistable Hybrid Soft Actuators for a Controllable-Compliance Joint of an Exoskeleton Rehabilitation Robot

This paper presents the mechatronic design of a biorobotic joint with controllable compliance, for innovative applications of “assist-as-needed” robotic rehabilitation mediated by a wearable and soft exoskeleton. The soft actuation of robotic exoskeletons can provide some relevant advantages in terms of controllable compliance, adaptivity and intrinsic safety of the control performance of the robot during the interaction with the patient. Pneumatic Artificial Muscles (PAMs), which belong to the class of soft actuators, can be arranged in antagonistic configuration in order to exploit the variability of their mechanical compliance for the optimal adaptation of the robot performance during therapy. The coupling of an antagonistic configuration of PAMs with a regulation mechanism can achieve, under a customized control strategy, the optimal tuning of the mechanical compliance of the exoskeleton joint over full ranges of actuation pressure and joint rotation. This work presents a novel mechanism, for the optimal regulation of the compliance of the biorobotic joint, which is characterized by a soft and hybrid actuation exploiting the storage/release of the elastic energy by bistable Von Mises elastic trusses. The contribution from elastic Von Mises structure can improve both the mechanical response of the soft pneumatic bellows actuating the regulation mechanism and the intrinsic safety of the whole mechanism. A comprehensive set of design steps is presented here, including the optimization of the geometry of the pneumatic bellows, the fabrication process through 3D printing of the mechanism and some experimental tests devoted to the characterization of the hybrid soft actuation. The experimental tests replicated the main operating conditions of the regulation mechanism; the advantages arising from the bistable hybrid soft actuation were evaluated in terms of static and dynamic performance, e.g., pressure and force transition thresholds of the bistable mechanism, linearity and hysteresis of the actuator response.
Information-Theoretic Online Multi-Camera Extrinsic Calibration

Calibration of multi-camera systems is essential for lifelong use of vision-based headsets and autonomous robots. In this work, we present an information-based framework for online extrinsic calibration of multi-camera systems. While previous work largely focuses on either monocular, stereo, or strictly non-overlapping field-of-view (FoV) setups, we allow arbitrary configurations while also exploiting overlapping pairwise FoV when possible. In order to efficiently solve for the extrinsic calibration parameters, which increase linearly with the number of cameras, we propose a novel entropy-based keyframe measure and bound the backend optimization complexity by selecting informative motion segments that minimize the maximum entropy across all extrinsic parameter partitions. We validate the pipeline on three distinct platforms to demonstrate the generality of the method on resolving the extrinsics and performing downstream tasks. Our code is available at https://github.com/edexheim/info_ext_calib.
On the Development of a Voice and Gesture Based HMI for the Control of a Mobile Robot

This paper presents the development of a voice and gesture based interface (HMI – Human - Machine Interface) for the human control of a mobile robot. The application utilizes the Microsoft Kinect sensor and its Visual Studio C# libraries for voice and gestures recognition. Once, the specific voice commands or gestures are recognized, the controller (a PC or Laptop) sends specific commands to a microcontroller (ATmega2560 on an Arduino Mega board). The microcontroller is mounted on the mobile robot and controls the robot’s motors. Also there are presented some limitations of the Kinect sensor to be taken into consideration when using it.