Miracle-dz/UniFAR-FTUs huggingface dataset:
Challenges in Inter-Vehicular Communication – Lessons of the 2010 Dagstuhl Seminar

Inter-Vehicle Communication (IVC) has become an extremely hot topic in network research, opening up new research challenges well beyond those of classical Mobile Ad Hoc Network (MANET) research. In October 2010, a Dagstuhl seminar has been organized bringing together many of the internationally leading experts in this field to discuss open issues and challenges related to IVC. This article reports the main findings of this meeting, that was set up to cover a wide range of topics. In particular, the following four areas were studied in working groups: Fundamental Limits and Opportunities of IVC, IVC Communication Principles and Patterns, Security and Privacy in IVC, and IVC Simulation and Modeling. A general conclusion drawn is that IVC is now at a turning point where the first generation systems are engineered and will soon be brought to market while, at the same time, IVC is experiencing the beginning of a new era characterized by a more fundamental research approach.
8 Simultaneous Assessment Beyond Coronary Stenosis by Multislice Computed Tomography

Whereas in the past computed tomography (CT) of the coronary arteries could detect only calcifications, recently multislice computed tomography (MSCT) has been already accepted as an efficient noninvasive tool for the detection of coronary artery stenosis, providing good sensitivity, specificity, and very high negative predictive value. However, it must be recognized that these good results are obtained when technically inadequate scans or patients with rapid heart rates, arrhythmia, or severe calcification were excluded. Therefore, for patients who already have a clinical indication for coronary angiography by MSCT in a real world, it would be a clinically important advantage if the same MSCT data could be used to gain additional information about the coronary artery disease (CAD). It has been reported that MSCT enables the analysis of the coronary plaques, left ventricular (LV) function, left atrial volume, myocardial enhancement, aortic valve, and the thoracic aorta, besides the assessment of the coronary stenosis. In this chapter, we focus on the additional information obtained simultaneously from the same data for coronary angiography by MSCT.
TBL 1 D CHARACTERIZING VORTICAL STRUCTURES IN THE LOWER LOG REGION OF THE ATMOSPHERIC BOUNDARY LAYER USING LARGE-SCALE PARTICLE TRACKING VELOCIMETRY

A large-scale particle tracking velocimetry (LS-PTV) system has been developed as a means of quantifying coherent structures within the atmospheric boundary layer. The LS-PTV system resolves three-dimensional, Lagrangian tracks over a volume of approximately 16m3. Mean velocity and Reynolds stresses have been validated and compared with wind-mast measurements and boundary-layer similarity formulations. The probability distributions for streamwise, spanwise and vertical velocity-fluctuation components agree with Gaussian distributions of equal variance. In contrast, the probability distributions for acceleration and vorticity are exponential and symmetric about zero. Thus, extreme acceleration events and vorticity events would be underpredicted by a Gaussian distribution. Finally, examples of particle paths exhibiting a high degree of swirl are presented, which are speculated to be signatures of large vortical structures.
Modelling and control of a flexible soft robotic uterine elevator.

Current laparoscopic techniques for achieving a safe hysterectomy rely heavily on manipulating and stabilizing the uterus using a transvaginal uterine elevator. Commercially available uterine manipulators are rigid in design and lack attributes like flexibility for pose control, force sensing or ease of adaptability. The current technique in using uterine elevator is to have an assistant manually reposition the uterus in response to the surgeon's command. Inefficient response to these commands, lack of experience, poor commands by the surgeon or fatigue are some of the issues arising from the use of the current manipulation technique. Furthermore, the manipulation of a rigid and stiff uterine elevator could potentially damage the uterine wall. A flexible uterine manipulator which can be controlled remotely whilst the surgeon is sitting at the operating console would be a big step forward in advancing robotic gynaecological surgery. These issues motivate this research on the development of an innovative flexible uterine elevator. This research was aimed at developing pneumatically controlled, octopus inspired robotic exible uterine manipulator, GENTLER (Gynaecological ENdoscopic uTerine eLEvatoR), based on soft continuum mechanism with integrated force and pose sensors. The use of soft robotics technology for practical applications requires modelling of the shape, movement and dynamics of the robot. Based on the literature, efforts in modelling the behaviour of this manipulator have focused mainly on kinematic modelling, while dynamics of the system is poorly studied which restricts the full potential of the technology. Another aspect that remains open is robust or stiffness control design of this pneumatically driven soft tube. Variable stiffness control is of prime importance to achieve the accuracy required to satisfy the desired position and force commands. Therefore, this research focused on the development of material-based dynamic modelling, a novel approach to embody the inherent nonlinearity exhibited by soft continuum manipulator as well as the design of real-time tunable stiffness control. Semi-empirical approach was used, which combined both theoretical modelling and experimental analysis of data obtained in laboratory to develop the model and the control architecture. Finally, the proposed modelling approach and control architecture were implemented into the prototype of GENTLER. The working prototype was validated in real-time using ex-vivo testing.
Byzantine Resilient Protocol for the IoT

Wireless sensor networks (WSNs), often adhering to a single gateway architecture, constitute the communication backbone for many modern cyber-physical systems (CPSs). Consequently, fault-tolerance in CPS becomes a challenging task, especially when accounting for failures (potentially malicious) that incapacitate the gateway or disrupt the nodes-gateway communication, not to mention the energy, timeliness, and security constraints demanded by CPS domains. This paper aims at ameliorating the fault-tolerance of WSN-based CPS to increase system and data availability. To this end, we propose a replicated gateway architecture augmented with energy-efficient real-time Byzantine-resilient data communication protocols. At the sensors level, we introduce fault-tolerant trustful space-time protocol, a geographic routing protocol capable of delivering messages in an energy-efficient and timely manner to multiple gateways, even in the presence of voids caused by faulty and malicious sensor nodes. At the gateway level, we propose a multigateway synchronization protocol, which we call ByzCast, that delivers timely correct data to CPS applications, despite the failure or maliciousness of a number of gateways. We show, through extensive simulations, that our protocols provide better system robustness yielding an increased system and data availability while meeting CPS energy, timeliness, and security demands.
A possible 3:2 orbital epicyclic resonance in QPO frequencies of Sgr A*

A recent measurement of double peak QPOs frequencies in Sgr A* is consistent with the 3:2 ratio. The same ratio is firmly established by previous observations in all double peaked kHz QPOs in microquasars and theoretically explained by orbital epicyclic resonances excited in nearly Keplerian accretion flow in a black hole's strong gravity. If confirmed, the 3:2 ratio of double peak QPOs in Sgr A* will be of a fundamental importance for the black hole accretion theory, by providing another clear argument that the accretion disk oscillations are indeed governed by non-linear, strong-gravity physics.
Study of serum glucose and cholesterol level in schizophrenic patient’s before and after treatment of olanzapine, risperidone and haloperidol

Objectives: To evaluate the potential association between antipsychotics (Olanzapine, Risperidone and Haloperidol), serum glucose level and serum cholesterol level in schizophrenic patients. Introduction: Schizophrenia is quite prevalent and has high rate of chronicity and morbidity. Newer atypical antipsychotic drugs were developed in response to limitations such as lack of efficacy and side effects associated with older (conventional) agents. However, significant hyperglycemia, dyslipidemia and weight gain have been reported with the use of newer atypical antipsychotics. Materials and Methods: This was an observational prospective study. Total 75 schizophrenic patients were divided in three groups according to treatment allocated (group I- olanzapine, group II- risperidone, group III haloperidol) comprising of 25 patients in each group. Blood sample was collected when patient came to hospital for the first time before starting the treatment and 6 weeks after treatment, then again 6 months after treatment, fasting serum glucose and cholesterol levels were estimated by enzymatic procedure. Simultaneously body weight was also measured. Results: In this study majority of patients were male-73.33% with mean age of 30.76 years. There were significant increase in serum glucose levels and serum cholesterol level, after 6 weeks and 6 months of treatment (t=3.11 p t=3.65 p Conclusion: Olanzapine was associated with increased risk of glucose intolerance, dyslipidemia and weight gain. Keywords: Antipsychotics, Schizophrenia, Cholesterol, Diabetes, Weight gain.
Parametric characterization of the spatial structure of partially coherent and partially polarized beams

On the basis of the second-order intensity moments formalism, the relationship between the spatial structure and the overall polarization characteristics of partially polarized Gaussian Schell-model beams of a certain kind has been investigated. More specifically, attention has been focused on a type of source that cannot be distinguished from ordinary Gaussian Schell-model fields when polarization measurements are disregarded. For this class of beams several general properties have been obtained that enable us to link the beam coherence polarization matrix and the beam quality parameter with certain polarization degrees recently introduced in the literature.
Carrier-carrier scattering: An experimental comparison of bulk GaAs and GaAs/AlxGa1-xAs quantum wells.

The energy loss of a hot electron to a thermalized electron-hole plasma has been studied using the optical recombination of a hot electron at a neutral acceptor. The dependence of the energy-loss rate on plasma density was measured in both bulk and quantum-well samples. In bulk, the energy-loss rate is significantly sublinear as a result of screening. In quantum wells, the rate is nearly linear in plasma density, showing that screening is less important. Measurements in an asymmetric coupled-well sample show that the interaction between a hot electron in one well and a plasma in an adjacent well is much weaker than if they are in the same well
Cryptography Triple Data Encryption Standard (3DES) for Digital Image Security

Advances in technology in the field of internet, making the Internet become the most popular data transmission media for now. This is certainly not free from the incidence of cyber crime, such as theft and data modification. Given the losses caused by data manipulation is very detrimental to the owner, then the original data can be misused in the cyber world. Cryptography offers an algorithm for randomizing data, so it can not be read by unauthorized people. The cryptography technique was implemented using Triple Data Encyption Standard (3DES) given the results of a randomized cryptographic algorithm, it is possible to arouse suspicion from the viewer. For that will be done the process of insertion of cryptographic files into another media in the form of images commonly referred to as steganography. The steganography technique that will be used is End of File (EOF). The combination of 3DES and EOF in the 64x64 pixel image with grayscale color format produces the fastest image processing time of 173.00192 seconds with the highest Peak Signal to Noise Ratio (PSNR) value of 25.0004 dB, while in the 128x128 pixel image with grayscale format has produced the highest PSNR 21.0084 dB.
QPOs in microquasars and Sgr A.: measuring the black hole spin

In all four microquasars which show double peak kHz QPOs, the ratio of the two frequencies is 3:2. This strongly supports the suggestion that twin peak kHz QPOs are due to a resonance between some modes of accretion disk oscillations. Here, we stress that fits to observations of the hypothetical resonances between vertical and radial epicyclic frequencies (particularly of the parametric resonance) give an accurate estimate of the spin for the three microquasars with known mass. Measurement of double peak QPOs frequencies in the Galaxy centre seems also to be consistent with the 3:2 ratio established by previous observations in microquasars, however the SgrA* data are rather difficult for the same exact analysis. If confirmed, the 3:2 ratio of double peak QPOs in SgrA* would be of a fundamental importance for the black hole accretion theory and the precise measurement could help to solve the question of QPOs nature. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Modeling the Evolution of Dusty Starburst Galaxies in Multiband Deep Surveys

We model the constraints set on the evolution of dusty starburst galaxies by the current deep extragalactic surveys performed in the far-infrared with Spitzer, and at radio wavelengths with the VLA. Our models fit the number counts in all the available spectral bands well and also provide a reasonably close match to the redshift distribution of the Spitzer detections. We find (1) dusty starburst galaxies with infrared burst phases triggered by galactic interactions at redshift z ~ 1-2 are good candidates to fit the Spitzer results at 24, 70, and 160 μm, assuming plausible strengths for the PAH features for the infrared luminous sources. An Arp 220-like spectral energy distribution (SED) for ultraluminous infrared galaxies (ULIRGs) of Lir > 1012 L☉ and one like that of M82 for luminous infrared galaxies (LIRGs) of Lir ~ 1011-1012 L☉ give a successful fit to the Spitzer 24 μm and ISOCAM 15 μm number counts at flux levels of Sν < 1 mJy. (2) The strong evolution of the number density of the ULIRGs from redshift z ~ 0 to ~1 predicted by our models is consistent with the current deep 1.4 GHz radio surveys and accounts for the upturn in the 1.4 GHz differential counts at the submillijansky flux level. (3) Comparison with number counts at near-infrared bands, as well as the background measurements using DIRBE and 2MASS, shows that only a fraction of the stellar mass in the universe is included in our models of dusty starburst mergers at z ~ 1-2.
The effect of solar radiation variations on the climate of the Earth

It follows from the analysis of observation data that the secular variation of the mean temperature of the Earth can be explained by the variation of short-wave radiation, arriving at the surface of the Earth. In connection with this, the influence of long-term changes of radiation, caused by variations of atmospheric transparency on the thermal regime is being studied. Taking into account the influence of changes of planetary albedo of the Earth under the development of glaciations on the thermal regime, it is found that comparatively small variations of atmospheric transparency could be sufficient for the development of quaternary glaciations. DOI: 10.1111/j.2153-3490.1969. tb00466.x
Gravothermal oscillations in two-component models of star clusters

In this paper, gravothermal oscillations are investigated in two-component clusters with a range of different stellar mass ratios and total component mass ratios. The critical number of stars at which gravothermal oscillations first appeared is found using a gas code. The nature of the oscillations is investigated and it is shown that the oscillations can be understood by focusing on the behaviour of the heavier component because of mass segregation. It is argued that, during each oscillation, the recollapse of the cluster begins at larger radii while the core is still expanding. This recollapse can halt and reverse a gravothermally driven expansion. This material outside the core contracts because it is losing energy both to the cool expanding core and to the material at larger radii. The core-collapse times for each model are also found and discussed. For an appropriately chosen case, direct N-body runs were carried out, in order to check the results obtained from the gas model, including evidence of the gravothermal nature of the oscillations and the temperature inversion that drives the expansion.
Dopant incorporation, Fermi-level movement, and band offset at the Ge/GaAs(001) interface.

On demontre que la reduction de la hauteur de la barriere sur Ge dans des heterojonctions avec GaAs (001) semi-isolant, est directement correlee a l'incorporation de dopant du cote Ge de l'interface. L'accord avec le modele de Tersoff supporte l'hypothese que l'alignement des bandes est pratiquement independant des effets d'interface
PARTIAL SUMS OF CERTAIN MEROMORPHIC FUNCTIONS

The purpose of the present paper is to establish some results concerning the partial sums of meromorphic starlike and meromorphic convex functions analogous to the results due to H. Silverman [J. Math. Anal. Appl. 209 (1997), 221-227]. Furthermore, we consider the partial sums of certain integral operator.
Ultrafast laser-induced spin-transfer torque in a non-collinear magnetic bilayer

Many proposed spintronics devices for writing data are based on the use of spin currents. These currents can switch magnetic bits by transfer of angular momentum from one magnetic layer to the other, extering a torque on the magnetization. To switch magnetic devices efficiently with currentinduced spin-transfer torque, new methods are being investigated to create intense and short spin current pulses. In this thesis, we report on the occurance of spin transfer torque on unprecedented timescales by excitation of a ferromagnetic bilayer by femtosecond laser pulses. When exciting a ferromagnetic layer with a femtosecond laser pulse, an ultrafast demagnetization is induced in this layer within a picosecond. This demagnetization has shown to be accompanied by the generation of a spinpolarized current on the same extremely short timescale. In this research, it is demonstrated that laser-induced spin currents are present in a CoNi/Cu/Co non-collinear magnetic bilayer and that these currents exert a spin-transfer torque on one of the magnetic layers, changing the orientation of its magnetization. To this end, we performed time-resolved laser-induced remagnetization measurements using TR-MOKE, from which laser-induced precessions of the magnetization in both magnetic layers are isolated. The properties of a precession, such as amplitude and phase, depend on the excitation mechanism of the precession. We developed macro-spin models for precessions induced by different mechanisms in both layers and compared the obtained precessional properties to these models. It is demonstrated that the in-plane magnetized layer of the bilayer is excited by a short majority spin current, coming from the out-of-plane magnetized layer. Furthermore, the amplitudes of the current-induced precessions are compared for Cu and Pt spacer layers. The induced precessions are found to be much smaller for Pt, as expected from the small spin diffusion length in Pt. Furthermore, we found that the spin transfer length in Pt is almost ten times smaller than in Cu. Concluding, we have demonstrated for the first time that laser-induced spin currents can be used to change the orientation of the magnetization of one of the magnetic layers in a non-collinear bilayer.
Investigating the effects of gamification-enhanced flipped learning on undergraduate students’ behavioral and cognitive engagement

ABSTRACT In recent years, flipped learning has attracted much attention around the world. This instructional approach is appealing because it can free up class time for knowledge application activities with help from the instructor and peers. However, its implementation can be fraught with challenges. Student disengagement in out-of-class activities, for example, is one of the major challenges of flipped learning. The purpose of this study is to examine whether gamification can enhance student engagement in a flipped course. A comparison study was conducted, involving two classes of undergraduate students in an Information Management course. The results indicated that students in the gamification-enhanced flipped learning group (n = 48) were more likely to complete the pre-class and post-class activities on time than those in the non-gamified flipped learning group (n = 48). Students in the gamification-enhanced flipped learning group also produced higher quality artifacts than the non-gamified flipped learning group in the pre-class thinking activities. Moreover, students in the gamification-enhanced flipped learning group scored significantly higher in the post-course test than did their non-gamified counterparts.
Magnetorotational instability driven dynamos at low magnetic Prandtl numbers

Numerical simulations of the magnetorotational instability (MRI) with zero initial net flux in a non-stratified isothermal cubic domain are used to demonstrate the importance of magnetic boundary conditions. In fully periodic systems, the level of turbulence generated by the MRI strongly decreases as the magnetic Prandtl number (Pm), which is the ratio of kinematic viscosity and magnetic diffusion, is decreased. No MRI or dynamo action below Pm = 1 is found, agreeing with earlier investigations. Using vertical field conditions, which allow the generation of a net toroidal flux and magnetic helicity fluxes out of the system, the MRI is found to be excited in the range 0.1 ≤ Pm ≤ 10, and the saturation level is independent of Pm. In the vertical field runs, strong mean-field dynamo develops and helps to sustain the MRI.
Anchor ring-vesicle membranes.

A family of the exact and analytical solutions of the equilibrium shape equation of vesicle membranes is found. They are anchor rings with generating circles of radii in the ratio 1/ \ensuremath{\surd}2 . It is shown that these ring vesicles are stable for some negative values of their spontaneous curvatures, such that experimental construction of such vesicles seems possible. A discussion shows that a positive Gauss-curvature elastic modulus favors the formation of these special vesicles.
Interdecadal changes in southern hemisphere winter storm track modes

Abstract The interdecadal changes in southern hemisphere (SH) winter cyclogenesis have been studied using a global twolevel primitive equation instability-model with reanalysed observed July three-dimensional basic states for the periods 1949–1968 and 1975–1994. The early to mid-1970s were a time of quite dramatic reduction in the winter rainfall in the southwest of western Australia (SWWA). We find that the rainfall reduction is associated with a decrease in the vertical mean meridional temperature gradient and in the peak upper tropospheric jet-stream zonal winds near 30◦ south throughout most of the SH. These changes are reflected in the properties of the leading SH cyclogenesis modes: for 1975–1994 both the fastest growing mode, and on average the 10 leading SH cyclogenesis modes that cross Australia, have growth rates which are around 30% smaller than for the corresponding modes for 1949–1968. The sensitivity of our results, to the strengths of physical parametrizations and to the choice of basic states based on different data sets, is examined. Our results suggest that a primary cause of the rainfall reduction overSWWA in the period after 1975 is the reduction of the intensity of cyclogenesis and the southward deflection of some storms.