Miracle-dz/UniFAR-FTUs huggingface dataset:
Advanced honeypot architecture for network threats quantification

Today's world is increasingly relying on computer networks. The increase in the use of network resources is followed by a rising volume of security problems. New threats and vulnerabilities are discovered everyday and affect users and companies at critical levels, from privacy issues to financial losses. Monitoring network activity is a mandatory step for researchers and security analysts to understand these threats and to build better protections. Honeypots were introduced to monitor unused IP spaces to learn about attackers. The advantage of honeypots over other monitoring solutions is to collect only suspicious activity. However, current honeypots are expensive to deploy and complex to administrate especially in the context of large organization networks. This study addresses the challenge of improving the scalability and flexibility of honeypots by introducing a novel hybrid honeypot architecture. This architecture is based on a Decision Engine and a Redirection Engine that automatically filter attacks and save resources by reducing the size of the attack data collection and allow researchers to actively specify the type of attack they want to collect. For a better integration into the organization network, this architecture was combined with network flows collected at the border of the production network. By offering an exhaustive view of all communications between internal and external hosts of the organization, network flows can (1) assist the configuration of honeypots, and (2) extend the scope of honeypot data analysis by providing a comprehensive profile of network activity to track attackers in the organization network. These capabilities were made possible through the development of a passive scanner and server discovery algorithm working on top of network flows. This algorithm and the hybrid honeypot architecture were deployed and evaluated at the University of Maryland, which represents a network of 40,000 computers. This study marks a major step toward leveraging honeypots into a powerful security solution. The contributions of this study will enable security analysts and network operators to make a precise assessment of the malicious activity targeting their network.
An Estimation of Wave Attenuation Factor in Ultrasonic Assisted Gravity Drainage Process

It has been proved that ultrasonic energy can considerably increase the amount of oil recovery in an immiscible displacement process. Although many studies have been performed on investigating the roles of ultrasonic waves, based on the best of our knowledge, little attention has been paid to evaluate wave attenuation parameter, which is an important parameter in the determination of the energy delivered to the porous medium. In this study, free fall gravity drainage process is investigated in a glass bead porous medium. Kerosene and Dorud crude oil are used as the wetting phases and air is used as the non-wetting phase. A piston-like displacement model with considering constant capillary pressure and applying Corey type approximation for relative permeabilities of both wetting and nonwetting phases is applied. A pressure term is considered to describe the presence of ultrasonic waves and the attenuation factor of ultrasonic waves is calculated by evaluating the value of external pressure applied to enhance the flow using the history matching of the data in the presence and absence of ultrasonic waves. The results introduce the attenuation factor as an important parameter in the process of ultrasonic assisted gravity drainage. The results show that only a low percentage of the ultrasonic energy (5.8% for Dorud crude oil and 3.3% for kerosene) is delivered to the flow of the fluid; however, a high increase in oil recovery enhancement (15% for Dorud crude oil and 12% for Kerosene) is observed in the experiments. This proves that the ultrasonic waves, even when the contribution is not substantial, can be a significantly efficient method for flow enhancement.
Target detection in sea clutter using convolutional neural networks

A detector based on convolutional neural networks is proposed for radar detection of floating targets in highly complex and nonstationary cluttered environments. This detector is coherent and monocell, i.e. it works with the complex envelope of the echoes from the same range cell. It includes a pre-processing time-frequency block implemented by the Wigner-Ville distribution, which provides a constant false alarm rate (CFAR) behavior regarding the clutter power when normalization is utilized. Simple theoretical models for the clutter and targets were allowed to study the impact of the correlation and Doppler of both target and clutter on its performance. This detector has also been tested with real-life sea clutter with an improved performance compared to classic detectors.
Application of the finite/discrete element method to arches

During the last 10 years UK engineering consultancy Gifford has been assessing masonry arch bridges and using the finite/discrete-element method to predict their structural behaviour. In the majority of cases this work has followed bridge strength assessments based on traditional techniques where under-strength bridges are first identified. Over 200 bridges have now been investigated ranging from small rural bridges in the UK to massive structures used by Indian Railways, and a significant economic and environmental benefit gained through their continued use. This paper describes how the finite/discrete-element method has been applied and verified and covers the description of a development programme including full-scale laboratory tests, supplementary load tests on bridges in the field, and several monitoring programmes. The advantages this technique can provide over conventional arch bridge analyses, both limit analysis (mechanism) and traditional finite-element modelling, are described and how through .
Future Mobility Survey

The Future Mobility Survey (FMS) is a smartphone-based prompted-recall travel survey that aims to support data collection initiatives for transport-modeling purposes. This paper details the considerations that have gone into the survey's development, including the smartphone apps for iPhone and Android platforms, the online activity diary and user interface, and the background intelligence for processing collected data into activity locations and travel traces. The various trade-offs concerning user comprehension, resource use, and participant burden, including findings from usability tests and a pilot study, are discussed. Close attention should be paid to the simplicity of the user interaction, determinations of activity locations (such as the false positive and false negative trade-off in their automatic classification), and the clarity of interactions in the activity diary. The FMS system design and implementation provide pragmatic, useful insights into the development of similar platforms and approaches for travel and activity surveys.
Injury characteristics in Norwegian male professional football: A comparison between a regular season and a season in the pandemic

The Coronavirus Disease-19 (COVID-19) pandemic forced the Norwegian male premier league football season to reschedule, reducing the fixture calendar substantially. Previous research has shown that a congested match schedule can affect injury rates in professional football. Therefore, we aimed to investigate whether the Norwegian premier league teams suffered more injuries in the more match congested 2020 season than in the regular 2019-season. We invited all teams having participated in both seasons to export their injury data. Only teams that used the same medical staff to register injuries in both seasons were included, and to maximize data comparability between seasons, we applied a time-loss injury definition only. Seven of 13 teams agreed to participate and exported their injury data. Both seasons had 30 game weeks, but the 2020 season was 57 days shorter than the 2019 season. The match injury incidence did not differ significantly [incidence rate ratio 0.76 (0.48–1.20; p = 0.24) in the 2020 season compared to the 2019 season. Furthermore, we found no differences in the number of injuries, days lost to injury, matches missed to injury, or injury severity. We could not detect any differences between the two seasons, suggesting the congested match calendar combined with the safety measures in the 2020 season can be a safe alternative in future seasons.
A morphosyntactic approach to language contact in African varieties of English

ABSTRACT This study aims to widen our knowledge of substrate influence and language transfer in World Englishes through the study of the verb complementation system of REGRET in four African postcolonial varieties. An examination of the most widely spoken substrates in each variety does not seem to explain the different tendencies in the distribution of finite and nonfinite complementation patterns across varieties, since English varieties with different complementation systems in their substrate languages, Kenyan English and Nigerian English, for example, show similar distributions in their use of English complementation. Such differences in the distribution seem to be the result of other factors playing an essential role in language contact situations, namely, the tendency towards transparency in second language varieties, the geographical proximity of the English varieties, and the evolution of the varieties measured in terms of the Dynamic Model (Schneider 2007).
Fabrication, simulation and experiment of a rotating electrostatic silicon mirror with large angular deflection

We propose in this paper the complete study of a bulk micromachined silicon micromirror able to tilt up to /spl plusmn/20/spl deg/ at a relatively high frequency (1 kHz). These structures actuated with particular electrodes could be also used as a digital micromirror up to 35/spl deg/. Their behaviours have been tested in term of static and frequency responses. A non-linear phenomenon has been observed at very large angle. The pressure dependence of the quality factor of the microstructure is reported. Lifetime aspect has also been tested.
Design, study, modelling and control of a new single-phase high power factor rectifier based on the single-ended primary inductance converter and the Sheppard-Taylor topology

A new single-phase power factor corrector (PFC) based on the Sheppard-Taylor topology is studied. Compared with conventional PFCs, this topology facilitates a better input current tracking, lower voltage stresses across the devices and larger output voltage range for the same operating area. The converter is integrated as a PFC at the DC-end of a single-phase diode bridge. Pulse-width-modulated (PWM) multi-loops control schemes are proposed and developed in order to ensure a unity power factor at the AC-source side and a regulated voltage at the DC-load side. The first control method uses the simple and robust hysteretic-based controller; the second employs a conventional PI regulator; and the third is based on the model nonlinearity compensation approach. The design of the last two control methods is based on the knowledge of a mathematical model that would accurately represent the converter. This model is developed in this paper using the state-space averaging technique, and then the small-signal transfer functions of the converter are derived for linear control design purpose. The performance of the different control strategies is evaluated through simulation experiments carried out on a numerical version of the converter. The implemented model of the converter is obtained by using the switching function technique. The control system is tested under both rated and disturbed operating conditions. The system performance is evaluated in terms of source current total harmonic distortion (THD), input power factor, DC voltage stabilization, and regulation following load variations.
Investigation on Broadband Microstrip Two Element Monopole Antenna with High Gain

Abstract The paper deals with the theoretical and experimental investigation on a simple two-element antenna exhibiting wideband operation. This antenna consists of two monopole antenna elements with modified ground plane. Generally, monopole antenna provides low gain. Here, upto 6 dBi gain has been achieved. Percentage bandwidth of the antenna is 80%. Previously, researchers have already achieved this type of percentage bandwidth but in most of the cases, gain is much lower. The novelty of this paper lies in the achievement of wide bandwidth with high gain.
Heterogeneity in Spatial Correlation and Influential Factors on Property Prices of Submarkets Categorized by Urban Dwelling Spaces

AbstractThe relationship between housing characteristics and residential property price is complex to illustrate. To have a better understanding of the housing-price structure, structural or spatial submarkets have been introduced in previous studies. However, there is no consensus on the importance of neighborhood effect among them. With regard to this issue, this study specifically focuses on the differences in structural, geographical, and demographical effects between housing submarkets (as categorized by dwelling space). Market subdivisions are relative to consumer behaviors. The heterogeneity of spatial effects in different submarkets gives an explanation as to why the impact of nonneighborhood housing factors in those submarket models is similar, regardless of whether the neighborhood effect is included or not. It also indicates that only some, but not all, of the potential purchasers would make decisions with reference to transaction records of flats in the surrounding areas, only when the flat th.
ITIL in Small to Medium-Sized Enterprises: toward a proposal based on an ITIL processes implementation sequence and a pofile scheme strategy for implementing the first process in the sequence

The backdrop of actual problematic about the implementation of Information Technology (IT) services management in Small and Medium Enterprises (SMEs) will be described. It will be exposed the reasons why reaching a maturity/capability level through well-known standards or the implementation of good software engineering practices by means of IT infrastructure Library are really difficult to achieve by SMEs. Also, the solutions to the exposed problems will be explained. Also master thesis goals are presented in terms of: purpose, research questions, research goals, objectives and scope. Finally, thesis structure is described.
ON RETIMING SYNCHRONOUS CIRCUITRY AND MIXED-INTEGER OPTIMIZATION

In this paper we investigate properties of retiming, a circuit transformation which preserves the behavior of the circuit as a whole. We present an algorithm which transforms a given combinational circuit into a functionally equivalent pipelined circuit with minimum latency and clock-period no greater than a given upper bound c. The algorithm runs in O (E ) steps, where E is the number of interconnections in the circuit, and is optimal within a constant factor. We give a novel and concise characterization of the minimum clock-period of a circuit in terms of the maximum delay-to-register ratio cycle in the circuit. We show that this ratio does not exceed the minimum feasible clock-period by more than the maximum delay D of the elements in the circuit. This characterization leads to an O (E lg D) algorithm for minimum clock-period pipelining of combinational circuitry with latency no greater than a given upper bound l, an O (min{V E lg(V D), V E }) algorithm for minimum clock-period retiming of unit-delay circuitry, an O (V E lg D) algorithm for minimum clock-period retiming of general circuitry and an O (min{V E lg(V W ) lg (V D), V E lg (V D)}) algorithm for approximately minimum clock-period retiming, where V is the number of processing elements in the circuit. We demonstrate the closed semiring structure of retiming on unit-delay circuits under a given clock-period constraint. Finally, we give an O (V lg V ) algorithm for a mixed-integer optimization problem which arises in the linear programming framework of retiming.
Who matters to shared psychological climate perceptions? An investigation of social network tie types and attributes

Abstract Psychological climate perceptions are related to important employee attitudes and behaviors, yet our knowledge of how such perceptions develop is relatively limited. Building upon work that has found that employees’ interaction with coworkers influences similarity in employees’ psychological climate perceptions, we focus on how network ties (advice, friendship) and their attributes (trust, expertise) are related to shared psychological climate perceptions. We use social information processing theory to argue that employees who have friendship and advice ties characterized by high levels of trust and expertise will have similar perceptions of the psychological climate. Using social network data from 61 employees in an information technology organization, we find that employees have psychological climate perceptions similar to those of friends whom they perceive to have high levels of trustworthiness and expertise, but not to those of low-trust or low-expertise friendship ties or advice ties. Our results challenge the notion that interaction in and of itself shapes psychological climate perceptions and instead suggest that certain ties with certain attributes are more important. In addition, we bring a sociological perspective into the highly ‘psychologized’ human resource management literature and contribute to social network research exploring social influence.
Investigation of feedback characteristics in single planar waveguide-coupled square microcavity by FDTD technique

Feedback characteristics in single planar waveguide-coupled square microcavity are investigated by using the two-dimensional finite-difference time-domain method. A square microcavity with refractive index of 3.5 and side length of 2. 2μm plays as a wavelength selective feedback element, and a single planar waveguide with width of 0. 2μm is used to input and output light in the simulation. Simulation results show that most of the on-resonance extinction in transmitted optical power through the planar waveguide can be reflected. The highest reflection observed is more than 92% of the incident power at the resonance wavelength. For better understanding the high reflection phenomenon, the steady field patterns of single waveguide coupled square microcavity has also been obtained. The influence of coupling gap between the cavity and waveguide, on the resonance wavelength, reflection efficiency and the linewidth of reflection peak has been studied. With increasing gap, the resonance position shifts to the longer wavelength, and the linewidth narrows. The results also show that an optimized gap exits for the highest optical power reflection.
Replicated micro-optics for automotive applications

Replicated micro-optics is playing an increasingly important role in illumination and sensing systems in automobiles. The introduction of new design methods and improvements in materials and production technology has led to components which can offer superior performance, size and weight compared with classical optical elements. Diffractive Optical Elements (DOEs) for applications such as beam shaping can achieve optical performance which is not possible with conventional optics. Beam forming elements for use with red and white LEDs play a major role in automotive optics. Customised DOEs can offer significantly more design flexibility and functionality over Fresnel lenses for the complex optical system based on a single or multiple LED source with reflector and wavelength converting resin. Thinner modules and improved efficiency are achieved. With CMOS imager sensors, micro-optical lenslet arrays can improve the effective sensitivity by many factors. UV-embossing and injection moulding are used to produce components in high volumes at low production costs. Replicated mounting and alignment features reduce assembly costs. New materials and processes have been developed to enable wafer-scale production by UV-embossing, producing glass-like components with excellent humidity and elevated temperature stability as well as IR-reflow process compatibility.
Visual Cue Requirements for Target Orientation Assessment in Air Combat Simulation

Abstract : The primary objective of this investigation was to determine the visual cues pilots use in air-to-air combat engagements in order to specify the level of detail required for flight simulator training. Fighter pilots were presented 35mm slide images of 1/48-scale model target aircraft, and the pilots indicated the spatial orientation of the targets and specified the visual cues they used to determine orientation. The independent variables were: target orientation, target type, target distance, pilot experience, and pilot's own aircraft type. Eleven target cues were predominantly used, and the frequency of use varied as a function of target orientation, type, and distance. Orientation recognition accuracy was also evaluated and it was also influenced by target orientation, type, and distance. Differences in pilot experience and pilot's own aircraft type had little or no effect on response accuracy. When the orientations were not clearly discernible, the pilots often indicated the orientations that would most likely -occur in air combat training. Additionally, the pilots often specified the illusory reverse target orientation. Air combat, Flight simulation, Visual cues, Air-to-air combat, Flight simulators, Visual systems, Aspect angle, Target orientation.
Automatic 3D shape recovery for rapid prototyping

The capacity to create, display and manipulate a three-dimensional (3D) computer model and produce a physical replica of an existing object, enabling 3D re-shaping activities, plays an important role in different areas such as engineering, biology, architecture and archaeology. Some improvements have been made in a biologically based computer-aided design system, called BioCAD, specifically designed for the rapid and accurate 3D shape recovery from existing large objects, creating 3D computer models either to produce sophisticated photo-realistic renderings, two-dimensional drawings, or to generate surface models for simulation purposes and rapid prototyping applications. This improved system comprises three main routines through which the major findings are as follows: i) the algorithm for “ciliary” calibration routine enables to converge all digital image sequence, so uncertainties decrease, resulting in higher accuracy; ii) through the binocular stereopsis routine, the 3D shape of the perceived large object can actually be inferred; iii) STL and SLI routine allows to integrate BioCAD system and other advanced computer-aided technologies, enabling one to obtain a very small layer thickness from a straightforward slicing process of STL files with a large dimension, minimising the slicing processing time by exploring the advantage of the Matlab language, in terms of matrix manipulation and RAM memory of personal computers.