Miracle-dz/UniFAR-FTUs huggingface dataset:
Blood compatibility evaluations of two-dimensional Ti3C2T x nanosheets

Two-dimensional nanomaterial Ti3C2T x is a novel biomaterial used for medical apparatus. For its application, biosafety serves as a prerequisite for their use in vivo. So far, no research has systematically reported how Ti3C2T x interacts with various components in the blood. In this work, we evaluated the hemocompatibility of Ti3C2T x nanosheets which we prepared by HF etching. Effects of the concentration and size of Ti3C2T x on the morphology and hemolysis rate of human red blood cells (RBCs), the structure and conformation of plasma proteins, the complement activation, as well as in vitro blood coagulation were studied. In general, Ti3C2T x takes on good blood compatibility, but in the case of high concentration (>30 μg ml−1) and ‘small size’ (about 100 nm), it led to the rupture of RBCs membrane and a higher rate of hemolysis. Meanwhile, platelets and complement were inclined to be activated with the increased concentration, accompanying the changed configuration of plasma proteins dependent on concentration. Surprisingly, the presence of Ti3C2T x did not significantly disrupt the coagulation. In vitro cell culture, the results prove that when the Ti3C2T x concentration is as high as 60 μg ml−1 and still has good biological safety. By establishing a fuzzy mathematical model, it was proved that the hemocompatibility of Ti3C2T x is more concentration-dependent than size-dependent, and the hemolysis rate is the most sensitive to the size and concentration of the Ti3C2T x . These findings provide insight into the potential use of Ti3C2T x as biofriendly nanocontainers for biomaterials in vivo.
PC-programs and modelling for borehole heat exchanger design

Design of ground heat exchangers for heat pumps is increasingly done with the support of easy-to-use, fast computer programs. These programs vary widely in calculation approach and accuracy. This paper gives a short overview of the early development, and focuses mainly on programs based on the g-function-method. This method is a suitable compromise between rules of thumb and tables on one hand and time-consuming numerical simulation on the other hand. Other programs are also discussed briefly, and a study on the reliability of such programs is discussed.
Multi-Trajectories of Macronutrient Intake and Their Associations with Obesity among Chinese Adults from 1991 to 2018: A Prospective Study

Studies on macronutrient intake and obesity have been inconclusive. This study examined the associations between multi-trajectories of macronutrients and the risk of obesity in China. We used data from 7914 adults who participated in the China Health and Nutrition Survey at least three times from 1991 to 2018. We collected detailed dietary data by conducting three 24 h dietary recalls and weighing foods and condiments in household inventories. We identified multi-trajectories using group-based multi-trajectory models and examined their associations with the risk of obesity with multiple Cox regression models. We found four multi-trajectories in rural areas: balanced macronutrient intake (BM), moderate protein, increasing low fat, and decreasing high carbohydrate (MP&ILF&DHC); decreasing moderate protein, decreasing high fat, and increasing moderate carbohydrate (DMP&DHF&IMC); increasing moderate protein, increasing high fat, and decreasing low carbohydrate (IMP&IHF&DLC)—35.1%, 21.3%, 20.1%, and 23.5% of our rural participant population, respectively. Compared with the BM trajectory, the hazard ratios of obesity in the DMP&DHF&IMC and the IMP&IHF&DLC groups were 0.50 (95% confidence interval (CI): 0.27–0.95) and 0.48 (95% CI: 0.28–0.83), respectively, in rural participants. Relatively low carbohydrate and high fat intakes with complementary dynamic trends are associated with a lower risk of obesity in rural Chinese adults.
Comparative analysis of boost and buck-boost derived topologies used as power factor correctors

AC/DC converters are extensively used in various applications. The electronics equipment uses as an input stage a rectifier with a capacitor as a filter. A major problem associated with these loads are the harmonic currents injected into the power supply and low power factor. The undesirable effects of harmonics distortion and low power factor are well documented. Therefore, it is highly desirable to include power factor correction schemes in the electronics equipment. A boost converter in the continuous conduction mode using the multiplier approach is commonly used as a power factor correction topology due to its excellent performance in medium power. Power factor correction topologies derived from the buck-boost converter have been proposed, mainly because they emulate a natural resistor when operating in discontinuous conduction mode, using a single control loop. Topologies derived from buck-boost converters, are an attractive solution in power factor correction applications in a relatively low power range. This paper presents a comparative analysis between a boost converter in continuous conduction mode and Sepic and Cuk converters in discontinuous conduction mode in order to study their performance in terms of PF, THD, efficiency, semiconductors stress, volume, etc.
Rotor Performance of a UH-60 Rotor System in the NASA Ames 80- by 120-Foot Wind Tunnel

Abstract : A full-scale four-bladed UH-60 rotor system was tested in the NASA Ames 80- by 120-Foot Wind Tunnel. A quality data set at low forward speed, 0 to 80 knots, has been obtained to support future rotor developments and analysis improvements. To evaluate the NASA Ames 80- by 120- Foot Wind Tunnel as a hover testing facility, rotor performance data were compared with predictions, UH-60 aircraft flight test data, and UH-60 model-scale data from other test facilities. Results indicate that valid hover data for this size rotor can be obtained from this facility at low to medium thrust conditions. Comparisons with flight test and model-scale data demonstrate the variability between existing data sets. Predictions show good agreement with full-scale data. To evaluate the analytical modeling in the 0 to 80 knot speed range, forward flight rotor performance data were acquired and compared with predictions. Comparisons were also made with existing model-scale and flight test data. Power calculations show fair to good agreement with full-scale wind tunnel data at advance ratios between 0.10 to 0.19 and poor agreement at advance ratios below 0.10. Comparisons with flight test and model-scale data show good agreement at all advance ratios tested. Propulsive force calculations show good correlation with full-scale wind tunnel data at advance ratios of 0.10 to 0.19.
EFFECT OF FAMILY-FRIENDLY PRACTICES ON EMPLOYEES’ INTENTION TO QUIT: THE MEDIATING ROLE OF ORGANIZATIONAL CITIZENSHIP BEHAVIOR

Turnover intention has become one of the most serious issues in organizations around the world. Hence, most organizations encourage family-friendly practices (FFPs) to retain employees and to reduce high turnover risk. A plethora of research has confirmed FFPs as a fruitful predictor of turnover intention. However, what is not yet known is whether FFPs directly influence turnover intention or indirectly through organizational citizenship behavior (OCB). To fill the gap, the present study examined the effect of FFPs on employees’ intention to quit. On top of that, the mediating role of OCB in the purported link was also examined. Data were collected from 338 health sector employees using a structured questionnaire. The results of the structural equation modeling using AMOS indicated a significant negative relationship between FFPs and employees’ intention to quit. Moreover, OCB negatively influences employees’ intention to quit and partially mediates the path between family-friendly practices and intention to quit. Based on theoretical and empirical evidence, this study advances existing knowledge and further understanding of organizational work practices. This study recommends that organizations should encourage FFPs to mitigate turnover rate among employees.
Wavelet Analysis of Near Infrared Spectral Data in the Application of Denoising

Spectrum signal may contain many peaks or mutations and noise also is not smooth white noise, to this kind of signal analysis, must do signal pretreatment, remove part of signal and extract useful part of signal.Based on the data of blood glucose near-infrared spectrum as the research object to explore the application of wavelet transform in the near infrared spectrum signal denoising, and through the simulation results show that using wavelet analysis of near infrared spectral data pretreatment than the traditional Fourier method can be higher precision of prediction.
CHAOTIC COMPRESSIVE SENSING OF TV –UHF BAND IN IRAQ USING CHEBYSHEV GRAM SCHMIDT SENSING MATRIX

Cognitive radio (CR) is a promising technology for solving spectrum sacristy problem. Spectrum sensing is the main step of CR. Sensing the wideband spectrum produces more challenges. Compressive sensing (CS) is a technology used as spectrum sening in CR to solve these challenges. CS consists of three stages: sparse representation, encoding and decoding. In encoding stage sensing matrix are required, and it plays an important role for performance of CS. The design of efficient sensing matrix requires achieving low mutual coherence . In decoding stage the recovery algorithm is applied to reconstruct a sparse signal. İn this paper a new chaotic matrix is proposed based on Chebyshev map and modified gram Schmidt (MGS). The CS based proposed matrix is applied for sensing real TV signal as a PU. The proposed system is tested under two types of recovery algorithms. The performance of CS based proposed matrix is measured using recovery error (Re), mean square error (MSE), and probability of detection (Pd) and evaluated by comparing it with Gaussian, Bernoulli and chaotic matrix in the literature. The simulation results show that the proposed system has low Re and high Pd under low SNR values and has low MSE with high compression.
Frequency domain characterisation of partial discharges via a non-invasive measurement system

Research conducted at the University of Bath has shown remote partial discharge detection via wideband radiometric measurements to be a feasible possibility, capable of challenging many well established electric methods. This paper will describe how frequency domain characterization techniques based on the Welch and MUSIC algorithms can produce consistent results capable of distinguishing between discharges in air, oil and plant switching operations.
Effect of Heart Rate Reserve on Prefrontal Cortical Activation While Dual-Task Walking in Older Adults

Hypertension is considered a risk factor for cardiovascular health and non-amnestic cognitive impairment in older adults. While heart rate reserve (HRR) has been shown to be a risk factor for hypertension, how impaired HRR in older adults can lead to cognitive impairment is still unclear. The objective of this study was to examine the effects of HRR on prefrontal cortical (PFC) activation under varying dual-task demands in older adults. Twenty-eight older adults (50–82 years of age) were included in this study and divided into higher (n = 14) and lower (n = 14) HRR groups. Participants engaged in the cognitive task which was the Modified Stroop Color Word Test (MSCWT) on a self-paced treadmill while walking. Participants with higher HRR demonstrated increased PFC activation in comparison to lower HRR, even after controlling for covariates in analysis. Furthermore, as cognitive task difficulty increased (from neutral to congruent to incongruent to switching), PFC activation increased. In addition, there was a significant interaction between tasks and HRR group, with older adults with higher HRR demonstrating increases in PFC activation, faster gait speed, and increased accuracy, relative to those with lower HRR, when going from neutral to switching tasks. These results provide evidence of a relationship between HRR and prefrontal cortical activation and cognitive and physical performance, suggesting that HRR may serve as a biomarker for cognitive health of an older adult with or without cardiovascular risk.
Preeminent System for Detecting Venomous Banking Sites in Online Business

Phishing has become most notorious security issues in online real time web pages. Many studies and ideas have been proposed related to phishing attack in order to overcome the security issues. Phishing attack can be easily done by Uniform resource locator (URL) obfuscation. It is the trick where the user will be forwarded to fake web page which has look and feel effect as the original web page when they click through the fake link. Organizations which use online business and transaction like ebay, paypal use many preventive approaches like blacklist, whitelist of URL in order to prevent any online theft using phishing attack. This paper propose a novel idea for detecting Phishing attack by checking the URL patterns of the suspected page with generated legitimate common URL pattern by inspecting different international URL patterns of that particular banking site.
The situated software architect

This thesis is an examination of the practice of software design amongst professional Australian software architects. It is based on a qualitative analysis of the data arising from transcripts of in-depth interviews with twenty-four software architects and two qualitative case studies of software-architectural design within large Australian organisations. The thesis argues that the practice of software design can only be understood in a holistic sense via a pluralist perspective, and that a constructivist philosophical approach is necessary to account for the practice of software design in a meaningful way. This argument discredits rationalism and by implication modernism as inappropriate philosophical bases for the universal observation, description and comprehension of the practice of software design. The motivation for pursuing this line of investigation is twofold. Firstly, the research seeks to explicate rich and descriptive accounts of the practice of software design in Australian business and industry contexts via an interpretivist research paradigm. Secondly, it attempts to explain the apparently a-rational behaviours of professional software architects in order to separate the practitioner from a sense of inadequacy or failure that follows from the universal imposition of rationalistic design methods and paradigms. The thesis pursues these goals by attempting to fit a situated model of design to the accounts of the participants. Structuring the research process and the rich narratives that emerge from the qualitative analysis is achieved using four philosophical perspectives—rationalism, pragmatism, criticalism and radicalism. The research delivers original findings on how practicing software architects negotiate requirements in the light of known solutions, how they are bound by perspective and paradigm, and the mechanics of their personal design processes. Through these descriptions of activity, the architect is revealed as an arranger of context and situation so as to constitute an environment in which to design tacitly. The thesis concludes that a situated perspective is necessary to understand the practice of software design.
Integrated common mode capacitors for SiC JFET inverters

SiC-JFET based inverters can achieve very fast switching, hence reducing the commutation losses, at the cost of increased Electro-Magnetic Interferences (EMI). To keep the EMI conducted emissions within reasonable limits, we propose to integrate some small-values capacitors directly into the power module. Common Mode (CM) is investigated and compared with a standard configuration. The high frequency noise, which is usually difficult to filter, is contained in a close loop with the switching source, and far from the network. To demonstrate this concept, simulations are used as well as experiments on a SiC-JFET half-bridge structure. Benefits and limitations are investigated in the case of mid-power range inverters for aircraft applications.
Phylogeography Reveals Association between Swine Trade and the Spread of Porcine Epidemic Diarrhea Virus in China and across the World

Abstract The ongoing SARS (severe acute respiratory syndrome)-CoV (coronavirus)-2 pandemic has exposed major gaps in our knowledge on the origin, ecology, evolution, and spread of animal coronaviruses. Porcine epidemic diarrhea virus (PEDV) is a member of the genus Alphacoronavirus in the family Coronaviridae that may have originated from bats and leads to significant hazards and widespread epidemics in the swine population. The role of local and global trade of live swine and swine-related products in disseminating PEDV remains unclear, especially in developing countries with complex swine production systems. Here, we undertake an in-depth phylogeographic analysis of PEDV sequence data (including 247 newly sequenced samples) and employ an extension of this inference framework that enables formally testing the contribution of a range of predictor variables to the geographic spread of PEDV. Within China, the provinces of Guangdong and Henan were identified as primary hubs for the spread of PEDV, for which we estimate live swine trade to play a very important role. On a global scale, the United States and China maintain the highest number of PEDV lineages. We estimate that, after an initial introduction out of China, the United States acted as an important source of PEDV introductions into Japan, Korea, China, and Mexico. Live swine trade also explains the dispersal of PEDV on a global scale. Given the increasingly global trade of live swine, our findings have important implications for designing prevention and containment measures to combat a wide range of livestock coronaviruses.
Degree days for building energy management — presentation of a new data set

Heating degree days are widely used in building energy management. For the construction of building performance lines, it is necessary to have the correct building base temperature with the meteorological station as close as possible to the building being monitored. In the UK, free degree day data is available on a monthly basis for 18 regions of the UK at a building base temperature of 15.5°C. This paper presents a new data set of degree days calculated for 77 regions, weekly and monthly, at a range of building base temperatures from 10.5°C to 20°C. The data is calculated using real hourly temperatures and is compared against degree days calculated using approximate equations. The data presented is free and is updated weekly at http://www.eci. ox.ac. uk/research/energy/degreedays.php Practical applications: Degree days are widely used in building energy management; however, they are often not used due to the lack of availability of data for different time intervals, for appropriate weather stations and at building base temperatures other than 15.5°C. This paper presents and discusses a data set at high spatial resolution (77 UK stations) at both weekly and monthly time intervals for building base temperatures from 10.5°C to 20°C. This resource is more accurate than traditional sources due to having been calculated from hourly Meteorological Office data rather than daily maximum and minimum temperatures. The data is available online, is updated weekly and in a form such that it can be dynamically linked in to building energy management programs.
Sensors for measurement of moisture diffusion in power cables with oil-impregnated paper

Some old power cables use oil-impregnated paper as the insulation material, which is enclosed by a layer of lead sheath. As cracks can form on the sheath of aged cables, the oil-impregnated paper can be exposed to the environmental conditions, and ambient moisture can diffuse into the paper through the cracks, causing a reduced breakdown voltage. To understand this diffusion phenomenon, multi-wavelength dielectrometry sensors have been used to measure permittivity and conductivity, aiming to obtain information on the moisture content. Different electrode-grouping strategies have been suggested to obtain more detailed information. Effectively, an electrode-grouping approach forms a type of electrical capacitance tomography sensor. This paper presents different sensor designs together with a capacitance measuring circuit. Some analytical results are also presented.
Review: Tea Tree (Melaleuca Alternifolia) As A New Material For Biocomposites

Melaleuca alternifolia or commonly known as tea tree is a tall shrub or small tree in the plant genus Melaleuca. It is popular for its oil, which is tea tree oil where it has been employed largely in various industries of its antimicrobial properties. Research works are still ongoing mainly focusing on the tea tree oil properties, ultimately almost none of them investigating on the residue which is the leaves. Environmental issues become the world major concern, which create awareness among industrial player to turn back to natural fibre in producing products. In recent time, productions of composites from agro waste have received considerable attention. This paper aims to rationalize the potential of tea tree (Melaleuca alternifolia) leaves as a new source of natural fibres or material in order to become the potential filler or reinforcer in the development of a new biocomposite.
The Effect of Hibiscus Flower Extract (Hibiscus rosa-sinensis L.) on the Growth of Streptococcus sanguinis Bacteria

According to the data of Global Burden Disease in 2016, periodontal disease is the 11th disease suffered by 750,487 people worldwide. Gingivitis occurs due to dental plaque formation. A half of bacterial plaque populations are Streptococcus sp. Streptococcus sanguinis is a predominant bacterial that initiates plaque formation. The adherence of this bacteria is mediated by fimbriae, pilus protein, lipoprotein, and glucosyltransferase enzymes. Hibiscus flower has a potential as an antimicrobial agent that may inhibit plaque formation due its active component i.e. flavonoid, tannins, and saponin. This study aimed to investigate the effect of Hibiscus rosa-sinensis L. flower extract concentration on the growth of Streptococcus sanguinis. Wells diffusion method was used in this study, using 100 μl bacterial suspension of 1,5 x 108 CFU/ml of bacteria. Hibiscus flower extract (2%, 4%, 6%), chlorhexidine 0,12% as a positive control, and distilled water as a negative control were added in the agar wells. The results showed that all concentrations (2 %, 4%, 6 %) of Hibiscus flower extract higher significantly compared to negative control. The concentration of 4% and 6% are higher ;significantly compared to positive control. The largest inhibitory zone was at a concentration of 6% (6,35±0,09 mm) and the smallest inhibitory zone was at a concentration of 2% (2,51±0,12 mm). The conclusion is that the concentration of Hibiscus rosa-sinensis L. flower extract affects the growth of Streptococcus sanguinis.