Miracle-dz/UniFAR-FTUs huggingface dataset:
Distributed Noise-Resilient Secondary Voltage and Frequency Control for Islanded Microgrids

This paper proposes a novel distributed noise-resilient secondary control for voltage and frequency restoration of islanded microgrid inverter-based distributed generations (DGs) with an additive type of noise. The existing distributed methods commonly are designed as secondary control system systems that operate on the assumption of ideal communication networks among DGs. However, the channels are prone to stochastic noise, whereas each DG obtains noisy measurements of the states of its neighbors via environmental noises. The existing distributed noise-resilient methods, ignore a complete model of the system. In contrast, this paper proposes consensus protocols that take into account both the noisy measurements and a complete nonlinear model of the system, examines the mean-square average consensus for voltage and frequency restoration of islanded ac microgrids in an uncertain environment, and provides accurate proportional real power sharing. Our proposed consensus protocol contains two parts: the state feedback of the agent and the relative states of the DG and its neighboring DGs. Finally, simulation studies are carried out in MATLAB/SimPowerSystems to evaluate the performance of the control laws. Simulation results and comparison with previous work reveals the effectiveness of the proposed method in regulating microgrid voltage and frequency and providing accurate proportional real power sharing.
Does Size Matter? Genital Self-Image, Genital Size, Pornography Use and Openness Toward Cosmetic Genital Surgery in 3503 Swedish Men and Women.

BACKGROUND Dissatisfaction with the appearance and size of one's genitalia is a common issue, and the use of cosmetic genital surgery is increasing among people with normal genitalia. AIM This cross-sectional study aimed to investigate the distribution of genital self-image in a large sample of males and females, and whether selected factors could predict genital self-image. METHODS Three thousand five hundred three anonymous participants completed online questionnaires. Multiple linear regressions were used to identify the association between genital self-image and genital size (length of penis or protrusion of labia minora), consumption of sexually explicit material (SEM), sexual activity, avoidance and safety seeking behaviors, openness toward genital cosmetic surgery and age. OUTCOMES Total scores on the Female and Male Genital Self Image Scale were used as the main outcome measures. RESULTS Overall, 3.6% of females and 5.5% of males had a severely low genital self-image (defined as 2 SD below the mean) and 33.8% of all individuals reported dissatisfaction with the appearance of their genitalia, with 13.7% of females and 11.3% of males considering undergoing cosmetic genital surgery. Mean protrusion of labia minora and stretched flaccid penis length in the population was estimated to 0.76 cm (95% CI 0.63-0.89 cm) and 12.5 cm (95% CI 12.33-12.76 cm), respectively. A higher genital self-image score was predicted by having a larger penis or less protruding labia minora, but not by the degree of SEM consumption, although 93.6% of males and 57.5% of females had consumed SEM in the past three months. The degree of avoidance and safety seeking behaviors, sexual activity, and openness toward genital cosmetic surgery predicted a low genital self-image. Being older was associated with a better genital self-image in females. CLINICAL IMPLICATIONS The results show that a psychological intervention may be needed as an alternative to cosmetic genital surgery for people who are dissatisfied with the appearance of their genitals. STRENGTHS AND LIMITATIONS This is one of few available studies investigating the association between actual genital size and genital dissatisfaction. The vast sample size and high response rate are also strengths. Limitations include the cross-sectional design, and possible bias in the study sample due to self-selection. CONCLUSION Overall, a low genital self-image and dissatisfaction with one's genitalia is relatively common and is influenced not only by genital size, but also behaviors performed to alleviate worry about one's genitals. Hustad IB, Malmqvist K, Ivanova E, et al. Does Size Matter? Genital Self-Image, Genital Size, Pornography Use and Openness Toward Cosmetic Genital Surgery in 3503 Swedish Men and Women. J Sex Med 2022;XX:XXX-XXX.
MATURITY MODEL-BASED PLANNING OF CYBER-PHYSICAL SYSTEMS IN THE MACHINERY AND PLANT ENGINEERING INDUSTRY

Cyber-physical systems (CPS) are networked, intelligent technical systems that interact with the physical and digital world alike. Companies now increasingly face the challenge of rapidly and consistently exploiting the emerging opportunities of this development. A prerequisite for this is a clear picture of the current position of products, the target position and first concrete steps towards the target projection. The contribution at hand shows an approach for the maturity model-based planning of cyber-physical systems in the machinery and plant engineering industry.
DEVELOPMENT OF A TRANSFER FUNCTION FOR WEIGHT PREDICTION OF LIVE BROILER CHICKEN USING MACHINE VISION

The objective of this study was to process digital images to investigate the possibility of broilers body weight estimation based on the dynamic model. For this experiment, 2440 images were recorded by a top-view camera from 30 birds. An ellipse fitting algorithm was applied to localize chickens within the pen, by using generalized Hough transform. Chickens’ head and tail were removed efficiently using the Chan-Vese method. After that, using image processing, six body measures were calculated. Next, they were used to design a Transform Function (TF) model with weight measurements as output. Second-order dynamic models were used to predict the weight of life broiler chicken, without delay, stable and with the highest R2 were predominantly selected according to the Young Identification Criterion (YIC) criterion chosen models. It was observed that predicted values rigorously follow the real values. Moreover, the relative body weight errors of chickens in the early days of grow-out was much more than last days. The accuracy of TF for body weight prediction from a comparison between measured (absolute) and predicted total life body weights were estimated for all studied broiler chicken (R2=0.98).
Bacterial microleakage in endodontically treated teeth following two methods of postspace preparation at two-time intervals: An in vitro study

Aims: The goal of this study was to analyze the bacterial microleakage following two methods (heat vs. rotary) of postspace preparation after two-time intervals (immediate vs. 1 week later). Setting and Design: In vitro-comparative study. Materials and Methods: Eighty-two single-rooted teeth were decoronated at the cementoenamel junction. Root canals were prepared using rotary files. After root canal obturation, specimens were randomly allocated to 4 experimental groups based on the method of postspace preparation (heat or peeso reamer) and time interval (immediate or 1 week later) (n = 18). Group 1: Peeso reamer-immediate, Group 2: Heat-immediate, Group 3: Peeso reamer-1 week later, Group 4: Heat-1 week later. 10 specimens were considered as positive and negative controls (n = 5 each). Custom-made dual-chamber devices were used to appraise the bacterial microleakage for 60 days. Statistical Analysis Used: Data were analyzed with Chi-Square and Log-Rank tests and Cox regression. Results: All through the experimental period, there was no significant difference (P = 0.41) between the studied groups. Groups 2 and 4 had the highest microleakage and the lowest survival rate (55.56% ± 11.71%). Group 1 showed the lowest microleakage and the highest survival rate (77.8% ± 9.80%). Conclusions: The applied techniques for postspace preparation and the time intervals (neither independently nor simultaneously) showed no significant difference in the field of bacterial leakage.
NEW K-MEANS CLUSTERING METHODS THAT MINIMIZES THE TOTAL INTRA-CLUSTER VARIANCE

: In this paper, we present new k-means clustering methods namely: the modified k-means method and the enhanced k-means method. The modified k-means clustering method proposed updates cluster centroids depending on if a point is added to a cluster or a point is removed from a cluster; while the enhanced k-means clustering method uses the Minkowski’s distance as its metric in a normed vector space instead of the usual Euclidean distance used in the modified k-means method and the existing methods. K-means clustering is one of the simplest and popular unsupervised learning techniques which aim is to classify points or objects to be analyzed into well separated groups or clusters. The existing k-means clustering methods discussed in this paper are the Forgy’s method, Lloyd’s method, MacQueen’s method, and the Hartigan and Wong’s method. It was observed that the modified k-means method performed relatively better than the enhanced k-means method and the other existing methods in terms of minimizing the total intra-cluster variance and accuracy using simulated data and real-life data sets.
Nano edible coatings and their applications in food preservation

Due to a lack of adequate infrastructure and limited use of modern postharvest technologies, 20 to 30% of the produce is lost annually. Using nano-edible coatings is among the suitable ways for preserving food characteristics at reasonable costs. For increasing the shelf life of food articles, a very thin layer is created on their surface. In a nanosystem, in contrast to a larger particle system, materials are supplied with improved and distinct properties. The shelf life of many products like fresh vegetables and fruits, nuts, etc., gets increased by this technology via the incorporation of substances having hydrophilic, antimicrobial, and antioxidant properties. The substances are generally released during storage periods of the food products. Different nanocoatings are nanoemulsion, polymeric nanoparticles, solid lipid nanoparticles, lipid nanocarriers, nanotubes, nanofibers, etc. Besides several advantages, some nanocoatings might carry allergic properties associated with them and also are economically not viable to use. Nanosystems nowadays are gaining a lot of importance in food preservation-related research areas, and their development as efficient edible coatings offer great potential in the relevant fields. Hence, there is a need for more research work to apply the nanoparticles and their consumption perspective.
A Comparative Study of Tools in Cybersecurity

— This paper deals with cyber security tools which is trending currently. Corporate leaders wide viewed it because the responsibility of their IT department. Several thought – maybe naively, it currently looks – that farewell because the right firewalls, antivirus packages and secret writing tools were in situation , they might leave IT security to the specialists and specialize in the opposite myriad components of running a business, these kind of reasons bring forward to implement cyber tools for security. Few sectors like facebook, Equifax, The UK national Health Service also Yahoo had data breaches in recent years.
A new pattern‐reconfigurable antenna with the function of 360° wide‐beam scanning and main beam direction finely‐adjustable

A new pattern‐reconfigurable antenna with the function of 360° wide‐beam scanning and main beam direction finely‐adjustable is proposed in this letter. The antenna consists of a central feeding disc which surrounded by four snowflake radiators on the top layer of the FR4 substrate. PIN diodes are placed between the disc and each snowflake patch for realizing the wide‐angle beam steering of the antenna. By controlling the four PIN diodes on the top layer, main beam can be switched in four directions with about 90° steps in the H‐plane (17°, 106°, 197°, and 287°). The bottom layer of the substrate includes a ground plane with eight rectangular ring slots. Eight PIN diodes installed on each slot are used to further control the beam direction of the antenna. By controlling the states of the PIN diodes on the bottom layer, the main beam of the proposed antenna is capable to deflect rightward or leftward about 10° on the basis of the original four states. The simulated and measured results show that the antenna operates well at 3.64–3.88 GHz under 12 states and achieves good performance with flexible pattern reconfigurability in 12 directions. The proposed antenna could be applied in 5G wireless communication systems.
Exploring the Effect of Using WhatsApp for Education During Exploring the Effect of Using WhatsApp for Education During Covid-19 on University Students’ Performance: A Technostress Covid-19 on University Students’ Performance: A Technostress Perspective Perspective

The use of mobile instant messaging (MIM), such as WhatsApp for learning can provide students with many benefits. With the recent switch to distance learning due to the COVID-19 outbreak, there is an ever growing reliance on information and communication technology for online teaching and learning. However, the increased use of MIM can also have consequences for students. This paper aims to explore the negative side of using WhatsApp during the shift to remote learning due to COVID-19. It investigates factors associated with WhatsApp use that cause fatigue among university students. Based on a review of the literature, it examines the effects of information and communication overload, invasion of life, and invasion of privacy on fatigue. It also examines the influence of fatigue on students’ performance. The data was collected via online questionnaires from 1188 undergraduate students in Saudi Arabia. The results indicate that the use of WhatsApp for learning creates fatigue among students. The reasons for the experience of fatigue are information and communication overload and invasion of privacy. The results also show that fatigue is negatively associated with students’ performance. The findings suggest that negative outcomes of MIM should be taken into account when designing distance learning.
Monte Carlo simulation of microparticle motion in vacuum gap

Breakdown voltages of vacuum gaps become lower when the gaps are contaminated by metallic and ceramic microparticles. In this paper, the motion of the microparticles in the gap is simulated using Monte Carlo method in order to evaluate the effect of parameters upon motion and the removal time of the microparticles. As the parameters, we focused on the material of the microparticle, the frequency, the peak value of the applied voltage, the gap length, and the diameter of the lower and upper electrodes. It turned out that the maximum time needed to remove all microparticles could be expressed as multiple regression function. It is suggested that the reliability of the microparticle removal can be increased by spark conditioning with opening/closing operation.
Theoretical and Experimental Investigations on Transient Run-Up Procedures of Journal Bearings Including Mixed Friction Conditions

This paper focuses on the operating behavior of journal bearings for industrial machinery application during run-ups. For this purpose, a numerical simulation code that is based on a two-dimensional extended and generalized Reynolds equation and a full three-dimensional energy equation, was advanced by a theoretical model considering the effects of mixed friction and warming of journal components during start-up. The mixed friction routine contained the elastic half-spaces model proposed by Boussinesq, which considers the influence of rough surfaces by implementing flow factors and calculates additional stiffness and dissipation in areas with solid interactions. Furthermore, a transient term was added in the energy equation to consider the thermal inertia of journal, and bearing to ensure a realistic heating during run-ups. Results of the prediction were compared to experimental data taken from a special test rig built up for validation procedures. Besides the conventional sensors for temperature, oil flow, and relative motion between shaft and stator, a contact voltage measurement was installed to determine the intensity of mixed friction. The evaluation of experimental data by Stribeck curves, based on a shaft torsion measurement, indicated a significant influence of run-up time on frictional moment. The friction coefficient of the rotor bearing system was strongly influenced by the run-up time. A short run-up time reduced the frictional coefficient in the mixed lubrication regime while the opposite behavior was observed in the hydrodynamic lubrication regime. The numerical code predicted these tendencies in good agreement with experimental data, however, only if the transient energy model was applied.
MS2DG-Net: Progressive Correspondence Learning via Multiple Sparse Semantics Dynamic Graph

Establishing superior-quality correspondences in an image pair is pivotal to many subsequent computer vision tasks. Using Euclidean distance between correspondences to find neighbors and extract local information is a common strategy in previous works. However, most such works ignore similar sparse semantics information between two given images and cannot capture local topology among correspondences well. Therefore, to deal with the above problems, Multiple Sparse Semantics Dynamic Graph Network (MS2 DG-Net) is proposed, in this paper, to predict probabilities of correspondences as inliers and recover camera poses. MS2 DG-Net dynamically builds sparse semantics graphs based on sparse semantics similarity between two given images, to capture local topology among correspondences, while maintaining permutation-equivariant. Extensive experiments prove that MS2 DG-Net outperforms state-of-the-art methods in outlier removal and camera pose estimation tasks on the public datasets with heavy outliers. Source code:https://github.com/changcaiyang/MS2DG-Net
Design of a Compact High Gain Microstrip Patch Antenna for Tri-Band 5 G Wireless Communication

Abstract In this paper, a Tri-band microstrip-line-fed low profile microstrip patch antenna is proposed for future multi-band 5 G wireless communication applications. The proposed antenna is printed on a compact Rogers RT5880 substrate of dimensions 20×16.5×0.508 mm3 with relative permittivity, εr of 2.2 and loss tangent, tan δ of 0.0009. To improve return loss and bandwidth of the proposed antenna, a partial ground plane technique is employed. The proposed antenna operates at 10, 28, and 38 GHz, three of the selected frequencies which are allocated by the International Telecommunication Union (ITU) for 5 G mobile communications. To reduce interference between the 5 G system and other systems in the band, a pair of T-shaped slots is etched in the radiating patch to reject unwanted frequency bands. The proposed design provides a gain of 5.67 dB at 10 GHz, 9.33 dB at 28 GHz and 9.57 dB at 38 GHz; the radiation pattern is mostly directional. The proposed antenna is designed and optimized using two commercial 3D full-wave software, viz. CST microwave studio and Ansoft HFSS. A prototype of the designed antenna that was fabricated and showed good agreement between the actual measurements of S11 & VSWR and the simulation results using both software.
Towards a Common Enumeration of Vulnerabilities

In this paper, we discuss the use of multiple vulnerability databases in our operational enterprise security environment and we consider some of the roadblocks we see to achieving interoperability between them. We introduce the concept of a Common Vulnerability Enumeration (CVE) as a mechanism that we believe will help to foster easier data sharing. We consider some historical examples of the development of taxonomies in other fields and relate them to current efforts in representing and sharing vulnerability information. We present a simplified representation of a "vulnerability" and discuss how we anticipate using it to mitigate the problem of interoperability. We also describe some of the practical issues that may be involved in the development and use of a CVE
A Simple Analytical Model of Capacity Fading for Lithium–Sulfur Cells

A simple ageing model is proposed for the fading of lithium–sulfur (Li–S) cell capacity with the number of cycles. The model could be applied for the ageing description of cells with an unknown internal structure in a wide range of engineering applications. Cycle profile that patterns with the real-life operation of cells is proposed. Thus, the degradation of the cell is simultaneously influenced by the 100% depth-of-discharge cycling and the cell staying at a charged state. The proposed model is described by the differential equation considering that the decrease of cell capacity per cycle is proportional to the product of cycle number and the charge available to be discharged within the appropriate cycle. The model covers the degradation processes dominant in the initial stage of ageing, where the cell capacity decreases from 100% to about 25% of its initial value. The solution of the proposed differential equation is an analytical function that requires only three fitted parameters. The dependence of model parameters on the charge/discharge current rate is shown for studied Li–S cells. Possible sources of degradation, such as the decrease of electrode effective area and the decrease of potential barrier on the electrode/electrolyte interface, are determined from the evaluation of the coulombic efficiency of the charge/discharge process.
Normalizing Twitter Journalism Practice in an Emerging Communication Space

This study examines how mainstream journalists who microblog negotiate their professional norms and practices in a new media format that directly challenges them. Through a content analysis of more than 22,000 of their tweets (postings) on the microblog platform Twitter, this study reveals that the journalists more freely express opinions, a common microblogging practice but one which contests the journalistic norm of objectivity (impartiality and nonpartisanship). To a lesser extent, the journalists also adopted two other norm-related microblogging features: providing accountability and transparency regarding how they conduct their work and sharing user-generated content with their followers. The journalists working for national newspapers, national television news divisions, and cable news networks were less inclined in their tweets than their counterparts working for less “elite” news outlets to relinquish their gatekeeping role by sharing their stage with other news gatherers and commentators, or to provide accountability and transparency by providing information about their jobs, engaging in discussions with other tweeters, writing about their personal lives, or linking to external websites.