Miracle-dz/UniFAR-FTUs huggingface dataset:
Household Food Insecurity in Regions of the Vietnamese Mekong Delta: Prevalence and Risk Factors

ABSTRACT Household food security in Vietnam remains tenuous. We surveyed 552 households to investigate household food insecurity (HFI) in rural districts in the Vietnamese Mekong Delta. HFI prevalence was 34.4% and 48.4% in the last month and last year, respectively. Khmer households were twice as likely to experience HFI compared to their Kinh counterparts. The primary factors associated with HFI were weak livelihood assets including lower natural, financial, and human assets (being landless, low incomes), physical and social assets (poor market access, social networks), lower kitchen utensil scores, belonging to a minority and experiencing financial, agricultural, and extreme weather shocks.
Histomorphology and sperm profile of animal models administered with aqueous seed extract of Parkia biglobosa

This study evaluated the effects of aqueous seed extract of Parkia biglobosa on the micro-anatomy of the testis and sperm profile of adult Wistar rats. Twenty-one male Wistar rats weighing between 96 and 120 g were assigned into three groups A, B, and C (n=7). Group A was the control and received normal saline, while the animals in groups B and C were treated with 300 and 500 mg/kg body weight (Bwt) aqueous seed extract of P. biglobosa orally and daily for 30 days. The animals were sacrificed via cervical dislocation at the end of the administration, and the testes were extracted for micro anatomical and histochemical studies. The Makler counting chamber was used for semen analysis while the Hematoxylin and Eosin (H and E) stain was used to assess the microstructure of the testicular tissues. The result from semen analysis showed a significant increase (p<0.05) in sperm motility, vitality, and morphology in the group treated with 300 mg/kg Bwt when compared with the control. The group treated with 500 mg/kg Bwt, showed a significant decrease in sperm motility, vitality, and morphology when compared with the control. H and E studies revealed the increased thickness of the germ cell layers of the seminiferous tubules (ST), with an increased number of spermatozoa in the lumen of ST in the group treated with 300 mg/kg bwt compared to the control group. This is a biomarker for improved spermatogenic activity in testicular tissues. Ingesting of P. biglobosa in the conditions used in this study seems to be safe and improves sperm parameters at a low dose (300 mg/kg Bwt).
Attitude determination by combining arrays of MEMS accelerometers, gyros, and magnetometers via quaternion‐based complementary filter

In this study, an Attitude and Heading Reference System (AHRS) consisting of 5 modules is designed where each module has a triaxial gyroscope, accelerometer, and magnetometer. First, a method based on the Levenberg‐Marquardt algorithm (LMA) is utilized to correct the bias error, scale factor and axes nonorthogonality. Also, the data from the 5 modules of AHRS are ensemble averaged to reduce the adverse effects of high‐frequency noises. Then, the obtained trends are used in an orientation estimation algorithm based on a complementary filter algorithm. In this algorithm, the dynamical accelerations are first decreased via a low‐pass filter. Afterwards, it is determined using an algorithm whether the system is experiencing magnetic distortion or not. If distortion is verified, magnetometers' data are discarded, as it will introduce noticeable error in estimating heading angle. In this case, the heading angle starts to diverge; however, employing 5 modules in the system decreases divergence rate noticeably, such that after 2 minutes in quasi‐static conditions, the pitch, roll, and heading angles' errors decrease, respectively, from 36.195°, 23.201°, and 12.541° when only 1 module is used to 2.511°, 3.972°, and 0.984° when all 5 modules are used. Moreover, in dynamical conditions, these errors decrease from 37.916°, 13.633°, and 13.071° to 6.514°, 5.961°, and 0.284°. Once the distortion is removed from magnetic field, the magnetometers' data are used again to correct the heading error. The obtained results show that the root mean square (RMS) errors of pitch, roll, and heading angles in quasi‐static conditions are 0.536°, 0.323°, and 0.601°, whereas in dynamical condition, they are 1.267°, 1.535°, and 0.994°, respectively.
Development of 6-DOF Equations of Motion for a Planning Boat Based on the Results of Sea Trial Tests

: Ingeneral,theattitudeofahigh-speedplanningboatchangesfollowingaspeedchange.Sincethehydrodynamicforcesacting onashipdifferaccordingtothechangeofitsunderwatershape,itisdifficulttoestimateitshydrodynamicforcecomparedtothatof alargecommercialship.Inthispaper,6DegreesOfFreedom(DOF)equationsofmotionthatexpressthemaneuveringmotionofa planningboataremodeledbyanalyzingitsmotioncharacteristicsbasedonvariousseatrialtests.Finally,amaneuveringsimulationis carriedoutandavalidationoftheequationsofmotionisconfirmedwiththeresultsofseatrialtests.
Release Kinetics and In Vitro Characterization of Sodium Percarbonate and Calcium Peroxide to Oxygenate Bioprinted Tissue Models

Oxygen-generating materials have been used in several tissue engineering applications; however, their application as in situ oxygen supply within bioprinted constructs has not been deeply studied. In this study, two oxygen-generating materials, sodium percarbonate (SPO) and calcium peroxide (CPO), were studied for their oxygen release kinetics under a 0.1% O2 condition. In addition, a novel cell-culture-insert setup was used to evaluate the effects of SPO and CPO on the viability of skeletal muscle cells under the same hypoxic condition. Results showed that SPO had a burst oxygen release, while CPO had a more stable oxygen release than SPO. Both SPO and CPO reduced cell viability when used alone. The addition of catalase in SPO and CPO increased the oxygen release rate, as well as improving the viability of skeletal muscle cells; however, CPO still showed cytotoxicity with catalase. Additionally, the utilization of 1 mg/mL SPO and 20 U catalase in a hydrogel for bioprinting significantly enhanced the cell viability under the hypoxic condition. Moreover, bioprinted muscle constructs could further differentiate into elongated myotubes when transferring back to the normoxic condition. This work provides an excellent in vitro model to test oxygen-generating materials and further discover their applications in bioprinting, where they represent promising avenues to overcome the challenge of oxygen shortage in bioprinted constructs before their complete vascularization.
Sliced Sparse Gradient Induced Multi-View Subspace Clustering via Tensorial Arctangent Rank Minimization

Multi-view clustering method tries to improve the performance of clustering by using the information existing in different views. The tensorial representation is more suitable to capture the high order correlations across different views while keep local geometrical structure in specific view. In this paper, we propose a sliced sparse gradient induced multi-view subspace clustering method via tensorial arctangent rank minimization, named SSG-TAR method. First, a tensorial arctangent rank (TAR) is defined, which is a tighter surrogate of the tensor rank and more effective to explore the consistency among multiple views. Second, a sliced sparse gradient regularization (SSG) is first proposed to enhance the discrimination between clusters and better capture the complementary information in view-specific feature space. Finally, we unify these two terms together and establish an efficient algorithm to optimize the proposed model. Furthermore, the constructed sequence was proved to converge to the stationary KKT point. We have carried out extensive experiments on ten datasets across different types and sizes to verify the performance of our model. The experimental results show that our method have achieved the state-of-the-art performance.
Physicochemical Characterization of Synodontis schall Gills Rhodanese

The cyanide detoxifying enzyme, rhodanese was extracted from Synodontis schall gills and some physicochemical properties investigated. Activity of the enzyme preparation was assayed by measuring the activity of rhodanese in RU min-1 mg-1. The results revealed that Synodontis schall gills rhodanese had km values for KCN and Na2S2O3 as 22.73±4.12 and 16.67±5.31 respectively. The enzyme had higher affinity for Na2S2O3. Only ammonium sulphate displayed possible sulfur donating property but was less effective than thiosulphate. Synodontis schall gills rhodanese displayed maximum activity at pH 8.0 and 35֠ºC. Synodontis schall gills rhodanese was significantly (p<0.05) inhibited by PbCl2, BaCl2 and HgCl2 in a concentration dependent manner. Gills rhodanese of Synodontis schall was similar in properties to rhodanese extracted from other sources.
Detecting High-Risk Anomalies in Aircraft Dynamics Through Entropic Analysis of Time Series Data

Despite recent efforts to move away from traditional threshold exceedance detection methods for aircraft state monitoring, modern aircraft still rely on safety thresholds to communicate to pilots the identification of an anomaly in the aircraft when a threshold is surpassed. Current anomaly detection methods mainly depend on uninterpretable machine learning models to learn complex patterns and relationships contained in the time series data of aircraft. Although these methods are capable of identifying known anomalies, their deficiency in interpretability presents a challenge when translating them to different aircraft. To overcome this deficiency, entropic analysis of aircraft dynamics seeks to characterize the complexity, or lack thereof, of the aircraft dynamics prior to the development of a risk scenario. This complexity characterization provides a more straightforward summary of state changes in the dynamics of flight variables. To build a foundation for entropic analysis, we analyzed the complexity of unstable approaches, an anomalous event present in many of today’s aviation accidents. The analysis revealed a statistically significant difference in the complexity distribution of flight variables under a stable approach versus an unstable approach. These differences in complexity were especially notable minutes before an approach was identified as unstable. Moreover, the multiscale entropic analysis revealed the presence of signal complexity at multiple time scales across multiple time windows before landing. By capturing state changes and corrections in the aircraft dynamics using entropy, advanced, yet still interpretable, sensor systems based on entropic frameworks from this study can be constructed in the future using classical machine learning approaches.
Can Outcomes of a Chat-Based Suicide Prevention Helpline Be Improved by Training Counselors in Motivational Interviewing? A Non-randomized Controlled Trial

Objective To examine whether the outcomes of a chat-based suicide-prevention helpline could be improved by training counselors in motivational interviewing (MI). Methods In a pre- and post-test design, visitors of a chat-based suicide prevention helpline received either the Five-Phase Model (treatment as usual [TAU]) or MI. They completed a pre- and post-chat questionnaire on several suicide-related risk factors. Linear mixed modeling was used to estimate the effect of the condition. Furthermore, the treatment proficiency of newly trained counselors was assessed using MI-Scope. Results A total of 756 visitors and 55 counselors were included in this study. The visitors showed an improvement in suicidal ideation and psychological risk factors after a chat conversation. However, there were no significant differences between the MI and TAU conditions (β = 0.03, 95% CI [−0.23–0.30], p = 0.80). The treatment integrity indices showed that the counselors mostly used MI-consistent techniques but were unable to strategically employ these techniques to evoke enough change talk. Conclusions MI and TAU led to comparable outcomes in a chat-based suicide prevention helpline. The effectiveness of MI might improve by intensifying or improving the training of counselors, keeping the process of engaging more concise or offering visitors multiple sessions of MI.
Parameters set-up for collision avoidance and smooth motion in 5-axis end milling based on a potential field approach

Although 5-axis free form surface machining is commonly proposed in CAD/CAM software, collision detection between the tool and the part with smooth tool axis reorientations still need to be addressed. In this paper, a physically based method using potential fields is developed to generate 5-axis collision-free smooth tool paths. The ball-end tool is considered as a rigid body moving in 3D space on which repulsive and attractive forces are acting. Investigations are carried out to set-up the simulation parameters and prevent the tool axis orientation from oscillating and to ensure a smooth behavior.
Relationship Between Arterial Stiffness Index, Pulse Pressure, and Magnetic Resonance Imaging Markers of White Matter Integrity: A UK Biobank Study

Background Alzheimer’s disease and dementia in general constitute one of the major public health problems of the 21st century. Research in arterial stiffness and pulse pressure (PP) play an important role in the quest to reduce the risk of developing dementia through controlling modifiable risk factors. Objective The aim of the study is to investigate the association between peripheral PP, arterial stiffness index (ASI) and brain integrity, and to discover if ASI is a better predictor of white matter integrity than peripheral PP. Materials and Methods 17,984 participants 63.09 ± 7.31 from the UK Biobank were used for this study. ASI was estimated using infrared light (photoplethysmography) and peripheral PP was calculated by subtracting the diastolic from the systolic brachial blood pressure value. Measure of fractional anisotropy (FA) was obtained from diffusion imaging to estimate white matter microstructural integrity. White matter hyperintensities were segmented from the combined T1 and T2-weighted FLAIR images as a measure of irreversible white matter damage. Results An important finding is that peripheral PP better predicts white matter integrity when compared to ASI. This finding is consistent until 75 years old. Interestingly, no significant relationship is found between either peripheral PP or ASI and white matter integrity after 75 years old. Conclusion These results suggest that ASI from plethysmography should not be used to estimate cerebrovascular integrity in older adults and further question the relationship between arterial stiffness, blood pressure, and white matter damage after the age of 75 years old.
FRAUD RISK AND AUDIT QUALITY: THE CASE OF US PUBLIC FIRMS

The study raises questions about the fraud detection technique and the relevance of audit quality to mitigate fraud. The paper suggests a more comprehensive proxy for fraud risk that relies on the combination of Z-score and Beneish M-score. Basing on Logit, regressions are applied to a sample of 5,613 US-listed public firms. The study reveals that the existence of an internal auditor and independent members within the audit committee would potentially reduce the fraud risk. Hiring a Big external auditor and paying it high fees is also helpful. Findings show that, unlike the firm leverage, both firm profitability and growth opportunities have a negative effect of on fraud risk. Leverage provides a motivation for fraudulent financial reporting. It is important to note that this research underscores the audit’s monitoring role to mitigate fraud. Also, the adopted model helps regulators, bankers, managers and auditors to detect fraud at an early stage. So needed action can be taken at suitable time. Finally, in this study, we focus on financially distressed companies rather than those with financial restatements. We suggest a collective tool to predict fraud risk; which is expected to offer a more reliable proxy for fraud risk than do binary models.
Study of Two Layered Immiscible Fluids Flow in a Channel with Obstacle by Using Lattice Boltzmann RK Color Gradient Model

Lattice Boltzmann method (LBM) is employed in the current work to simulate two-phase flows of immiscible fluids over a square obstacle in a 2D computational domain using the Rothman-Keller color gradient model. This model is based on the multiphase Rothman-Keller description, it is used to separate two fluids in flow and to assess its efficacy when treating two fluids in flow over a square obstacle with the objective of reducing turbulence by adjusting the viscosities of the two fluids. This turbulence can cause major problems such as interface tracking techniques in gas-liquid flow and upward or downward co-current flows in pipes. So, the purpose of the study is to replace a single fluid with two fluids of different viscosities by varying these viscosities in order to reduce or completely eliminate the turbulence. The results show that to have stable, parallel and non-overlapping flows behind the obstacle, it is necessary that the difference between the viscosities of the fluids be significant. Also, showing that the increase in the viscosity ratio decreases the time corresponding to the disappearance of the vortices behind the obstacle. The results presented in this work have some general conclusions: For M≥2, the increase in the viscosity difference leads to an increasing of friction between fluids, reducing of average velocity of flow and decreasing the time corresponding to the disappearance of the vortices behind the obstacle. However, for M≤1/2, the opposite occurs.
Stability Enhancement of Battery-Testing DC Microgrid: An ADRC-Based Virtual Inertia Control Approach

Power batteries play a vital role in electric vehicle (EV) industry. To evaluate their charging and discharging performance and achieve energy recovery, a power accumulator battery testing system (PABTS) based DC-microgrid (DC-MG) is proposed. However, during battery testing, frequent charging and discharging current test may endanger the stability of the PABTS DC-MG. Although, the traditional virtual inertia control (VIC) approach can stabilize the DC-bus voltage, its anti-interference ability is still limited. To solve this problem, an active disturbance rejection control (ADRC) based VIC control scheme is proposed, wherein the VIC approach provides virtual inertia for the system, and the ADRC is derived and modeled using the first-order virtual inertia equation. The external and uncertain internal disturbances in the system are considered for the total disturbance estimation. This disturbance is suppressed by feedback compensation, thereby greatly improving the system robustness. Finally, the effectiveness of the proposed ADRC-VIC method is further verified by experimental results on the laboratory hardware prototype under different scenarios.
Amelioration of Flesh Quality in Hybrid Grouper (♀ Epinephelus fuscoguttatus × ♂ E. lanceolatu) Fed With Oxidized Fish Oil Diet by Supplying Lactobacillus pentosus

The objective was to investigate the improvement of the flesh quality and nutritional value of hybrid grouper (♀ Epinephelus fuscoguttatus × ♂ E. lanceolatu) by Lactobacillus pentosus (BL-15). The two diets were prepared with 9% oxidized fish oil (OFO negative control group) or 9% fresh fish oil (FFO positive control group) as the major lipid source, and the OFO diet were sprayed with L. pentosus at 1.0×107, 1.0×108, 1.0×109 CFU/g, respectively. Five kinds of diets were fed to hybrid grouper with initial weight of 21.36 ± 0.03 g for 60 days. The results showed that (1) consumption of OFO diet significantly increased muscle crude lipid, total cholesterol, and total monounsaturated fatty acids contents and significantly decreased muscle C20:5n3, C22:6n3, ∑PUFA levels of grouper (p < 0.05), whereas the addition of L. pentosus to OFO diet significantly reduced muscle crude lipid, malondialdehyde, reactive oxygen radicals, total cholesterol concentration, increased C20:5n3, C22:6n3, ∑PUFA levels, increased muscle crude protein content, and enhanced muscle hardness, gumminess, and chewiness compared with FFO or OFO group (p < 0.05). (2) In addition, ingestion of OFO diet significantly increased muscle phenylalanine content and significantly decreased aspartic acid content (p < 0.05), while the addition of L. pentosus restored aspartic acid to the level not significantly different from that of FFO group (p > 0.05). The addition of L. pentosus also increased tyrosine, lysine, leucine, phenylalanine, arginine, and alanine content compared to FFO group at the same time (p < 0.05). (3) Furthermore, the intake of OFO diet would lead to deterioration in muscle flavor quality and increase in noxious odors in grouper, and the addition of L. pentosus can mitigate or rectify these detrimental consequences. In further analysis, consumption of OFO group significantly downregulated the mRNA expression of muscle growth factors and caused serious damage to the muscle antioxidant system (p < 0.05), which was protected against by the potent antioxidant properties of L. pentosus. We recommend the supplementation level of L. pentosus to be 1.0×109 CFU/g under the highly oxidized conditions of the present trial fish oil.
Pseudomonas fluorescens group bacteria as responsible for chromatic alteration on rabbit carcasses. Possible hygienic implications

Bacteria belonging to the genus Pseudomonas are ubiquitous and characterized by a high adaptation capability to different environmental conditions and wide range of temperatures. They may colonize food, sometimes causing alteration. Quite recently, a blue pigmentation due to Pseudomonas fluorescens has been widely reported in mozzarella cheese. In this report, we describe a blue coloration occurred on rabbit meat stored in the refrigeration cell of a slaughterhouse. The alteration was observed after about 72 hours of storage at 4-6°C. Bacteriological analyses were performed, and a microorganism included in the Pseudomonas fluorescens group was identified. The experimental contamination was planned, using a bacterial suspension with 1×108 UFC/ml load to spread on rabbit carcasses. The blue pigmentation appeared after 24 hours of storage in a cell with the same conditions of temperature. The bacterium was reisolated and identified as responsible for the alteration on meat. These findings highlight the importance of considering the members of the genus Pseudomonas and, more specifically, of the P. fluorescens group when the microbiological quality of food is to be ascertained. In fact, even if these bacteria are not considered a public health problem, their presence should be monitored by food industry operators in self-control plans because they may cause alteration in food. In fact, any altered product should be withdrawn from the market in agreement with Regulation (EC) No 178/2002 of the European Parliament and of the Council.