Miracle-dz/UniFAR-FTUs huggingface dataset:
Effect of axial force on the stability of milling: Local bifurcations around stable islands

In this paper, the stability properties of milling processes are presented when the axial component of the cutting force is also taken into account as a compressive force acting on the cutting tool. The mechanism of the material removal operation is described by a one degree-of-freedom oscillator subjected to the so-called surface regeneration effect. This can be represented mathematically by a nonlinear, time-periodic, delay differential equation. The regenerative compression affects the natural frequency of the system, which is modelled through the lateral stiffness variation of the bearing support of the main spindle. This extension of the general milling model leads to the birth of stable islands within the originally unstable parameter domain. Since the exploitation of these regions may open new ways in practice for increasing the efficiency of machining, the domain of attraction is investigated qualitatively near the stability boundaries of the stable island by means of a semi-analytical method.
Visual detection of glucose based on quantum dots aerogel in microfluidic chips

In this study, we demonstrated a new optical glucose microfluidic sensor based on quantum dots (QDs) aerogels and glucose oxidase (GOx) for rapid, low-cost and quantitative detection of glucose in human urine and serum. The combination of QDs–GOx based aerogels and microfluidic chips was first investigated and compared with other sensors, providing new insights into the design of a microfluidic system toward the detection of glucose.
Experiences of Australian women on returning to work after miscarriage

ABSTRACT Miscarriage, defined in Australia as spontaneous pregnancy loss occurring before 20 weeks gestation, is the most common adverse pregnancy outcome, occurring in up to one in four pregnancies. Given the frequency of miscarriage and increasing participation of women in the Australian workforce, the aim of this study was to describe women’s experiences of returning to work, including workplace support, following early pregnancy loss. Six hundred and seven women completed a cross-sectional online survey about their experiences returning to work and the workplace support they received following their miscarriage. The majority (84.7%) of participants reported taking leave of a median(IQR) duration of 7(10) days following their miscarriage. Paid leave (sick or annual leave) was the most common type of leave taken, with most (93.3%) respondents indicating that they would take paid bereavement leave if offered. Women’s reasons for disclosing or keeping private their miscarriage overlapped, aligning with the themes of managing their return-to-work experience and workplace culture. Most women reported receiving informal support provided by colleagues and managers. Women affected by miscarriage who were surveyed reported wanting formal leave options to be provided by their workplace and further support, including acknowledgement by managers, human resources and colleagues.
Road Curb Detection: A Historical Survey

Curbs are used as physical markers to delimit roads and to redirect traffic into multiple directions (e.g., islands and roundabouts). Detection of road curbs is a fundamental task for autonomous vehicle navigation in urban environments. Since almost two decades, solutions that use various types of sensors, including vision, Light Detection and Ranging (LiDAR) sensors, among others, have emerged to address the curb detection problem. This survey elaborates on the advances of road curb detection problems, a research field that has grown over the last two decades and continues to be the ground for new theoretical and applied developments. We identify the tasks involved in the road curb detection methods and their applications on autonomous vehicle navigation and advanced driver assistance system (ADAS). Finally, we present an analysis on the similarities and differences of the wide variety of contributions.
The Mechanism of Processivity and Directionality of Cytoplasmic Dynein

Author(s): Cleary, Frank Banta | Advisor(s): Yildiz, Ahmet | Abstract: Cytoplasmic dynein is a dimeric motor that transports intracellular cargoes towards the minus-end of microtubules (MTs). In contrast to other processive motors, microtubule release of the dynein heads is not precisely coordinated and the mechanism of dynein processivity remains unclear. By engineering the mechanical and catalytic properties of the motor we show that dynein processivity minimally requires a single active motor domain (head) and a second inert MT binding domain. The AAA+ ring and the linker of the other head are dispensable, suggesting that processivity arises from a high ratio of MT bound to unbound time, and not from interhead communication. Additionally, nucleotide-dependent microtubule release is gated by tension on the linker domain.We find that dynein releases rapidly from the MT when force is applied in the forward direction (towards the minus-end), but remains bound under backward forces. This finding suggests that the asymmetric release properties of the microtubule binding domain (MTBD) control dynein directionality. Consistent with this hypothesis, replacing the MTBD with a catalytically inactive kinesin motor domain, which favors release towards the plus end, results in reversal of motor directionality. Furthermore, a dynein dimer maintains its minus-end directed motility when the released monomer is allowed to orient freely during the search for a new binding site. The results rule out directionality models based on a swinging mechanism of the linker domain. We propose that the mechanism of dynein directionality is fundamentally distinct from kinesin and myosin motors and determined by asymmetric release and binding properties of its MT binding interface. We develop a quantitative model for dynein stepping that reproduces the velocity and stepping characteristics of dynein motors and their response to chemical and mechanical perturbation.
Target recognition and positioning method for steel structure spraying robot based on binocular vision

Aiming at the problem of spraying target identification and positioning of steel structure fireproof coating spraying robot, the stereo imaging model of binocular camera is established, and the collected binocular images are preprocessed by distortion correction and epipolar rectification. The application of multi-grid method in stereo matching and depth image calculation were studied, and the effect of multi-layer perceptron neural networks classifier (MLP) on segmentation of steel structure region in color image was researched. The experimental results in real scenes show that the error between the binocular vision measurement results and the actual distance is less than 2.5%. MLP classifier can effectively separate the target region from the color image, and further crop the depth image in this region to obtain the depth image containing only the target information.
Synthesis of Multi-Walled Carbon Nanotubes from Iraqi Natural Gas/CO Mixture by Catalytic Flame Fragments Deposition Method

Multi-walled carbon nanotubes (MWNTs) were synthesized from Iraqis natural gas using flame under carbon monoxide atmosphere. The study focuses on abilities to synthesis and characterization of carbon nanotubes (CNTs) using simple, easy, low cost by natural material. The reactor has been designed for synthesis of carbon nanotubes CNTs from natural gas which acted as a source of carbon in addition to supplying thermal energy instead of electrical energy. Crystallographic and morphological of CNTs have been characterized using powder X-ray diffraction, Raman spectroscopy, transmission electron microscope and thermal gravimetric analysis. The analysis refers to synthesized MWNTs with purity 57.80 % and outer diameter 6.6-17.9 nm, inner diameter 3.2-6.3 nm which equal to 3-9 of graphene layers while the length of tubes is 0.8 to 2 µ m. Al 2 O 3 catalysts at 700 ºC in a fixed horizontal reactor. According to the review the yield of carbon nanotubes was 55.01 wt% when use Ni-Mo as catalyst and 33.38 wt% for Co-Mo catalysts.
Investigation and Optimization of Mxene Functionalized Mesoporous Titania Films as Efficient Photoelectrodes

Three-dimensional mesoporous TiO2 scaffolds of anatase phase possess inherent eximious optical behavior that is beneficial for photoelectrodes used for solar energy conversion applications. In this regard; substantial efforts have been devoted to maximizing the UV and/or visible light absorption efficiency; and suppressing the annihilation of photogenerated charged species; in pristine mesoporous TiO2 structures for improved solar illumination conversion efficiency. This study provides fundamental insights into the use of Mxene functionalized mesoporous TiO2 as a photoelectrode. This novel combination of Mxene functionalized TiO2 electrodes with and without TiCl4 treatment was successfully optimized to intensify the process of photon absorption; charge segregation and photocurrent; resulting in superior photoelectrode performance. The photocurrent measurements of the prepared photoelectrodes were significantly enhanced with increased contents of Mxene due to improved absorption efficiency within the visible region; as verified by UV–Vis absorption spectroscopy. The anatase phase of TiO2 was significantly augmented due to increased contents of Mxene and postdeposition heat treatments; as evidenced by structural analysis. Consequently; an appreciable coverage of well-developed grains on the FTO surface was observed in SEM images. As such; these newly fabricated conductive mesoporous TiO2 photoelectrodes are potential candidates for photoinduced energy conversion and storage applications.
The correct author citation for taxa in Strumaria and changes to subgenera in Strumaria and Hessea (Amaryllidaceae: Amaryllideae), with a synopsis of the actinomorphic-flowered genera of subtribe Strumariinae

Aspects of the nomenclature and classification of the subtribe Strumariinae are corrected and emended as follows: Hessea subgenus Myophila (Snijman) Snijman and Strumaria subgenus Carpolyza (Salisb.) Snijman are described, and Strumaria section Gemmaria (Salisb.) Snijman is validated; the correct author citations for several names in Strumaria that were invalidly published by Jacquin are established; and a complete infrageneric synopsis for the actinomorphic-flowered taxa of subtribe Strumariinae is provided.
Molecular Clump Extraction Algorithm Based on Local Density Clustering

The detection and parameterization of molecular clumps are the first step in studying them. We propose a method based on the Local Density Clustering algorithm while physical parameters of those clumps are measured using the Multiple Gaussian Model algorithm. One advantage of applying the Local Density Clustering to the clump detection and segmentation, is the high accuracy under different signal-to-noise levels. The Multiple Gaussian Model is able to deal with overlapping clumps whose parameters can reliably be derived. Using simulation and synthetic data, we have verified that the proposed algorithm could accurately characterize the morphology and flux of molecular clumps. The total flux recovery rate in 13CO (J = 1−0) line of M16 is measured as 90.2%. The detection rate and the completeness limit are 81.7% and 20 K km s−1 in 13CO (J = 1−0) line of M16, respectively.
Fractional $ 1 $-Laplacian evolution equations to remove multiplicative noise

<p style='text-indent:20px;'>In this paper, we propose a new image denosing model to remove the multiplicative noise by a maximum a posteriori estimation and an inhomogeneous fractional <inline-formula><tex-math id="M2">\begin{document}$ 1 $\end{document}</tex-math></inline-formula>-Laplace evolution equation. The main difficulty of the problem is the equation will become very singular when <inline-formula><tex-math id="M3">\begin{document}$ u(x) = u(y) $\end{document}</tex-math></inline-formula>. The existence and uniqueness of the weak positive solution are proved. Numerical examples demonstrate the better capability of our model on some heavy multiplicative noised images. </p>
Market fear, investor mood, sentiment, economic uncertainty and tourism sector in the United States amid COVID-19 pandemic: A spillover analysis

The study investigates and confirms the spillover effects from investor fear, mood, sentiment and uncertainty to the US tourism sector returns. The findings indicate that market fear, investor mood and sentiment are net transmitter of shocks and economic uncertainty and the tourism sector is net receiver of shocks. We also provide evidence that media-hype, infodemic, media-coverage related to COVID-19 and infectious disease equity market volatility impacts the total and directional spillover of information from fear, mood, sentiment and uncertainty to the tourism sector.
Low-Temperature Synthesis, Structural and Optical Characterizations of The Novel Bisbs3 Thin Films as Anew Absorber Layer for Solar Cells

In this research work, thin films of BiSbS3 have been successfully synthesized onto well cleaned soda-lima glass substrates via the chemical bath deposition procedure at different thicknesses (t= 159, 243, 296 and 362 nm). The X-ray diffraction patterns of the chemically deposited BiSbS3 films depicted that the synthesized films exposed polycrystalline nature and have an orthorhombic structure. The structural parameters of the chemically deposited BiSbS3 films were evaluated by Debye-Scherer’s formulas. The surface morphologies of the BiSbS3 films were fixed via the field-emission-scanning-electron microscope. The analyses of the linear optical parameters of the chemically deposited BiSbS3 thin films refer to improving the values of the absorption coefficient, α and the linear refractive index, n via the increase in the film thickness. In addition, there is an observed reduction in the energy gap, Eg values from 1.38 to 1.22 eV occurred by raising the film thickness. Furthermore, there is an enhancement in the nonlinear optical constants and the optoelectrical parameters occurred by raising the film thickness where the nonlinear refractive index, \({n}_{2},\)the optical free carrier concentration, \({N}_{opt}\) and the optical conductivity σopt were enlarged with increasing the values of film thickness. Moreover, the hot probe procedure was applied to the BiSbS3 thin films and this method demonstrated that the chemically deposited BiSbS3 films are p-type semiconductors.
Holocene hydrography evolution in the Alboran Sea: a multi-record and multiproxy comparison

Abstract. A new high resolution deglacial and Holocene Sea Surface Temperature (SST) reconstruction is presented for the Alboran Sea (western Mediterranean), based on Mg / Ca ratios measured in the planktonic foraminifera Globigerina bulloides. This new record is evaluated by comparison with other Mg / Ca–SST and previously published alkenone–SST reconstructions from the same region for both Holocene and glacial period. In all cases there is a high degree of coherence between the different Mg / Ca–SST records but strong discrepancies when compared to the alkenone–SST records. We argue that these discrepancies are due to differences in the proxy-response during deglaciation which we hypothesize to reflect a resilience strategy of G. bulloides changing its main growth season. In contrast, short-term Holocene SST variability is larger in the Mg / Ca–SST than in the alkenone–SST records. It is proposed that larger Mg / Ca–SST variability to be the result of spring season variability, while the smoothed alkenone–SST variability represents average annual temperatures. Mg / Ca–SST record differentiates the Holocene in three periods (1) The warmest SST values occurred during the Early Holocene (11.7–9 kyr BP); (2) During the middle Holocene occurred a continuous cooling trend that culminated with the coldest Holocene SST in a double peak structure centred at around 4.2 kyr BP; (3) The Late Holocene (4.2 kyr BP to the present) did not follow any clear cooling/warming trend but millennial-scale oscillations were enhanced. This SST evolution is discussed in the context of changing properties in the Atlantic inflow associated to North Atlantic circulation conditions and also to local hydrographical and atmospheric changes. To conclude, we propose a tight link between North Atlantic circulation patterns and inflow of surface waters into the Mediterranean playing a major role in the controls of Holocene climatic variability of this region.
Regulation of FOXP3 Expression in Blood Cells in Response to All-Trans-Retinoic Acid, Interleukin 2 and Transforming Growth Factor β

FoxP3 is a transcription factor essential for the differentiation and function of T regulatory cells (Tregs). There are two major subsets of Tregs: natural Tregs (nTregs) generated in thymus and inducible Tregs (iTregs) produced in peripheral immune system. It has been documented that iTreg development is dependent on soluble mediators including interleukin 2 (IL2), transforming growth factor β (TGFβ) and all-trans-retinoic acid (ATRA). In our experiments we performed a gene expression array, followed by Real-time PCR experiments, to study the expression of genes regulated by 1,25-dihydroxyvitamin D (1,25D) or ATRA in cells of myeloid origin. Our experiments revealed that ATRA alone, but also a cocktail of mediators consisting of IL2, TGFβ and ATRA, upregulate the expression of FOXP3 gene in lymphoid cells, but also in normal and leukemic myeloid cells. The FoxP3 expression is followed by a phenotypic changes in cells of myeloid origin. Our results indicate that signaling pathways which are used in the late stages of T cell differentiation, are also active in the cells of myeloid lineage
Graphene Quantum Dots and Cu(I) Liquid Crystal for Advanced Electrochemical Detection of Doxorubicine in Aqueous Solutions

Two paste electrodes based on graphene quantum dots and carbon nanotubes (GRQD/CNT) and one modified with a homoleptic liquid crystalline Cu(I) based coordination complex (Cu/GRQD/CNT) were obtained and morphostructurally and electrochemically characterized in comparison with simple CNT electrode (CNT) for doxorubicine (DOX) detection in aqueous solutions. GRQD/CNT showed the best electroanalytical performance by differential pulse voltammetry technique (DPV). Moreover, applying a preconcentration step prior to detection stage, the lowest limit of detection (1 ng/L) and the highest sensitivity (216,105 µA/mg·L−1) in comparison with reported literature data were obtained. Cu/GRQD/CNT showed good results using multiple pulse amperometry technique (MPA) and a favorable shifting of the potential detection to mitigate potential interferences. Both GRQD-based paste electrodes have a great potential for practical utility in DOX determination in water at trace concentration levels, using GRQD/CNT with DPV and in pharmaceuticals formulations using Cu/GRQD/CNT with MPA.
Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan

Runoff with excessive nutrients from rice paddy fields that releases into the Pacific Ocean has been a possible cause of water body pollution and harm to marine life. Constructed wetlands had developed for decades but were rarely implemented in treating agricultural pollution in Taiwan. Moreover, the environmental policies haven’t provided enough instructions, support, or compensation for the establishment of this practice. The rice paddy field that was chosen in this study is located in Xinshe, Taiwan. It is close to the Pacific Ocean where coral reefs are nearby and fishery resource is abundant. In this study, the northern half of the whole organic field was chosen, and the contributing area is approximately 1 × 105 m2. Four plots of constructed wetlands (approximately 17.5 m wide, 16.7 m long, and 0.2 m deep each, covering 1164.74 m2 of the total area) and employing surface flow were established as CW treatment. Water spinach (Ipomoea aquatica) was used for treating the nutrient runoff from organic rice paddy fields. Water samples of input and output of constructed wetlands were collected during 51 days of the experimental period (from the first day of rice transplantation to 10-days before harvest). Ammonia, nitrate, nitrite, phosphate, and total phosphorus concentrations were analyzed to calculate the nutrient load. The runoff of rice paddy fields without constructed wetlands was also sampled as a reference (RPF treatment). In average, about 54.3% ammonia and 42.7% nitrate was removed from the runoff that went through the CW treatment, while 4.2% ammonia and 51.3% nitrate increase were found at the output of the RPF treatment. Meanwhile, 35.6% of total phosphorus and 29.5% of phosphate were removed from the runoff of constructed wetlands. Only 16.4% total phosphorus and 6.4% phosphate were removed from the RPF treatment. Results indicate that constructed wetlands are promising treatment for agricultural runoff and the result can be used as a reference for the future environmental policies enactment in Taiwan.
Blind Fusion of Hyperspectral Multispectral Images Based on Matrix Factorization

The fusion of low spatial resolution hyperspectral images and high spatial resolution multispectral images in the same scenario is important for the super-resolution of hyperspectral images. The spectral response function (SRF) and the point spread function (PSF) are two crucial prior pieces of information in fusion, and most of the current algorithms need to provide these two preliminary pieces of information in advance, even for semi-blind fusion algorithms at least the SRF. This causes limitations in the application of fusion algorithms. This paper aims to solve the dependence of the fusion method on the point spread function and proposes a method to estimate the spectral response function from the images involved in the fusion to achieve blind fusion. We conducted experiments on simulated datasets Pavia University, CAVE, and the remote sensing images acquired by two spectral cameras, Sentinel 2 and Hyperion. The experimental results show that our proposed SRF estimation method can improve the PSNR value by 5 dB on average compared with other state-of-the-art SRF estimation results. The proposed blind fusion method can improve the PSNR value of fusion results by 3–15 dB compared with other blind fusion methods.