Miracle-dz/UniFAR-FTUs huggingface dataset:
Research and Modeling of Mechanical Crosstalk in Linear Arrays of Ultrasonic Transducers

Linear arrays of ultrasonic transducers are commonly used as ultrasonic probes in medical diagnostics for imaging the interior of a human body in vivo . The crosstalk phenomenon occurs during the operation of transducers in which electrical voltages and mechanical vibrations are transmitted to adjacent components. As a result of such additional excitation of the transducers in the array, the directivity characteristics of the aperture used changes, and consequently there is interference with proper operation of a given array and the emergence of distortions in the obtained ultrasound image that reduce its quality. This paper studies the manner of propagation of mechanical crosstalk in the designed model of a linear array of ultrasonic transducers on the basis of unwanted signals, which appeared on elementary piezoelectric transducers when power is supplied to the selected transducer in the array. The universal model of linear array of ultrasonic transducers, which has been developed, allowed the simulation of mechanical crosstalk, taking into account the cross-coupling phenomenon in all of its structure with the use of finite elements method (FEM) implemented in COMSOL Multiphysics software. The analysis of crosstalk signals showed that they consist of aggregated pulses propagating with different speeds and frequencies. This signifies the formation of different vibration modes transmitted simultaneously via different paths. The paper is an original approach which enables to identify different vibration modes and estimate their participation in the crosstalk signal and their ways of propagation. Conclusions from the research allow predicting specific design changes which are significant due to the minimization of mechanical crosstalk in linear arrays of ultrasonic transducers.
Power Quality Improvement Wind Energy System Using Cascaded Multilevel Inverter

In this paper, a wind energy conversion system based on a cascaded H-bridgemultilevel inverter (CHBMLI) topology has been proposed to be used for the grid interface of largesplit winding alternators (SWAs). A new method has been suggested for the generation of referencecurrents for the voltage source inverter (VSI) depending upon the available wind power. TheCHBMLI has been used as a VSI and operated in a current control mode order to achieve theobjectives of real power injection and load compensation (power factor correction, load balancing,and harmonic compensation) based on the proposed reference generation scheme. In the fieldexcitation control of SWA provides a single means vary the dc link voltages of all the CHBssimultaneously and proportionately.
The Psychological Contributions of Natural Site Experiences in Kastamonu, Turkey

Abstract The present paper was carried out on 47 nature lover participants from different cities in Turkey that were brought together within the framework of the Nature Training Project and whose demographic backgrounds (age, education level, profession, income level, gender) were completely different from one another and who did not know one another previously. The participants were trained for one week by a number of expert trainers about nature on both theoretical and applied levels at the Pinarbasi district of Kastamonu. They were taken to the difficult-to-access untouched areas, where different geological formations can be found, to areas full of historic structures, waterfalls, canyons, caves, and national parks, and were informed about these areas and their flora and fauna. They were asked to listen to the natural sounds (wind, birds, water, leaves, etc.), to smell the soil and plants and to perceive different colors in nature. It was aimed to identify the changes in the moods of these people as well as the characteristics of nature that resulted in these changes. Besides, the present paper aims to determine which activities these people enjoyed the most in natural sites. The obtained results informed that natural site experiences had a positive impact on the participants, and helped them gain awareness, release stress, and achieve a more positive state of mind.
Tensor Analysis-based Nonlocal Magnetic Resonance Image Reconstruction with Compressed Sensing

Compressed sensing (CS) is a novel and important technique in MRI reconstruction, which can be used to reconstruct magnetic resonance images with few sampled data while simultaneously speeding up imaging. The conventional CS-based MRI is implemented from a global view, which leads to some disadvantages: it not only loses many local structures but also fails to preserve detail information. To obtain better reconstruction quality, we propose a novel CS-based reconstruction model, which is incorporated with nonlocal technology to allow for the preservation of extra details. The proposed model groups similar patches within the nonlocal area and stacks them to form a 3D array unit. Then, to process the array in a realistic 3D manner, a tensor-based sparsity constraint is developed as the regularization on the reconstructed image. Experimental results show that the performance of the proposed method is superior to those of conventional methods.
MBE-growth and characterization of InxGa1¡xAs/GaAs (x=0.15) superlattice

Un cualificado In 0 . 15 Ga 0 . 85 As/GaAs superenrejado ha sido desarrollado en un substrato de tipo n mediante una epitaxia de viga molecular (MBE). El analisis de esta estructura fue llevado a cabo, en primer lugar por una difraccion de rayos X (XRD) y en esta estructura el grosor, la aspereza y la concentracion x fueron determinadas del interfaz fueron determinados en una nano-escala. En segundo lugar, las caracteristicas electricas de este ejemplo, tales como la actual temperatura del voltaje (I-V-T), la temperatura del voltaje capacitado (G-V-T) y la temperatura de la conductividad del voltaje (G-V-T) estudiados dentro de un amplio rango de temperaturas. La distribucion energetica de los estados del interfaz fue determinada de las caracteristicas I-V del sesgo avanzado, teniendo en cuenta la dependencia diagonal de la altura eficaz de la barrera. Los resultados experimentales muestran como las caracteristicas avanzadas e inversas I-V son similares al comportamiento de la juntura de Schottky. El factor ideal n, las resistencias en serie Rs, la altura de la barrera y la densidad de los estados del interfaz Nss resultaron ser funciones importantes de la temperatura. Segun la teoria de la emision termoionica (TE), la altura de la barrera del sesgo cero, calculada de las caracteristicas del sesgo avanzado I-V resultaron aumentar con un aumento de la temperatura. Al mismo tiempo, el valor de R y la juntura del voltaje y la temperatura se obtuvieron de las caracteristicas C-V y G-V. La temperatura dependiente de las caracteristicas I-V, C-V y G-V confirmaron que la distribucion de las R y N son parametros importantes que influyen en las caracteristicas electricas de estos mecanismos.
Problem formulation Problem / issue Industry Academia Study state of the art Candidate solution Static validation Validation in academia Dynamic validation Release solution

Industry–academia collaboration is critical for empirical research to exist. However, there are many obstacles in the collaboration process. This paper reports on the experiences gained by the author, in a 2-year collaboration project on software testing which involved on-site work by the researcher in the industry premises. Based on notes, minutes of meetings, and progress reports, the project history is outlined. The project is analyzed, using collaboration models as a frame of reference. We conclude that there must be a balance between company ‘pull’ and academia ‘push’ in the collaboration Management support is inevitably a key factor to success, while other factors like cross-cultural skills and interfaces towards key resources also contribute.
MATRIX FROM OUR DEPLOYED SERVER BETWEEN PERSONS COLLABORATING WITH USER VENKATESH

Collaboration among enterprise users is often enhanced by their prior history that may include summary of the topics discussed, people involved, documents shared, and other such profile information. In enterprises, unlike in consumer collaboration, sharing this profile information could be extremely valuable and would further enhance the effectiveness of users in a collaboration session. For instance, a sales team member interacting with a potential customer over a period of time can share the profile or contextual information he or she gathered with a new member of the team. Sharing such profile information would jump start the collaboration of the new member and enhance the effectiveness of the collaboration. In this paper, we propose a session-based graph algorithm that recommends profile sharing possibilities to enterprise users based on the history of their collaboration strengths with persons interacting with them. We present results from implementing our algorithm on collaboration relationships that are computed on a deployed real-world enterprise server with approximately one million userperson relationships over a period of nine months. Keywords—Enterprise collaboration, contextual collaboration, user profiles, collaboration relationship strength
FINANCIAL AUDIT IN AN ARENA CONTEXT. AN ANALYSIS AT THE MESO-LEVEL

Research has generally focused either on the auditors’ decision-making process atmicro-level or on the financial audit environment at macro-level. The present paper’s contributionto knowledge consists in filling in this research gap by performing an analysis of the financial auditenvironment at meso-level and by pointing out the significance of strategic thinking in managingfinancial audit companies. The research method consists in applying to the financial audit field theso-called arena concept , a metaphor that describes in a symbolic manner the location of actionswhich influence collective decisions or policies. The main strength of the applied model is that itstructures and represents participants, communication, patterns of interaction, and decision-making processes. The authors conclude that there is a variety of interactions in the financial auditfield and that each group of participants may change the business dynamics.
Road-based proactive routing protocols for vehicular networks

ROAD-BASED PROACTIVE ROUTING PROTOCOLS FOR VEHICULAR NETWORKS by Neeraj Mahadevrao Rajgure Vehicular networks are formed by vehicles communicating in an ad hoc manner or through cellular and IEEE 802.11 base stations. Routing in vehicular networks is challenging due to highly dynamic network topologies. Previous research done at the UbiNetS lab at NJIT has proposed the idea of Road-Based using Vehicular Traffic information (RBVT) routing. In RBVT, routes are sequences of road intersections, and geographical forwarding is used for sending packets between the intersections. This thesis proposes two proactive RBVT protocols (RBVT-P and RBVT-PS) for city-based Vehicular Ad hoc NETworks (VANETs). RBVT-P is a completely distributed protocol that unicasts connectivity packets in the network to find the roadbased topology graph. This graph represents a real-time view of the roads with enough vehicular traffic to ensure connectivity between intersections and is disseminated to all nodes. RBVT-PS uses a similar concept, but the road connectivity information is gathered and sent separately to a server via cellular links The server centrally computes the connectivity graph and disseminates it to the nodes in the network. The proposed protocols are compared against existing routing protocols. Simulation results for city scenarios show that both RBVT-P and RBVT-PS perform better than the existing protocols, with reduction in end-to-end delay as much as 85% and increase in delivery ratio as much three times. RBVT-PS reduces the delay three times and increases the delivery ratio by 10% when compared with RBVT-P. ROAD-BASED PROACTIVE ROUTING PROTOCOLS FOR VEHICULAR NETWORKS by Neeraj Mahadevrao Rajgure A Thesis Submitted to the Faculty of New Jersey Institute of Technology in Partial Fulfillment of the Requirements for the Degree of Master of Science in Computer Science Department of Computer Science
The Relationship of Sexual Satisfaction and Marital Satisfaction with Domestic Violence against Pregnant Women

Results The average age of mothers was 28±5.2 years. Prevalence of domestic violence was reported 84.4% in this study. The 55.8% of participants reported physical violence, 81.2% reported emotional violence and 25.3% reported sexual violence. The mean score of marital satisfaction in women with domestic violence (162.5 ± 28.9) was significantly lower than that in pregnant women without domestic violence (188.7 ± 31.4). A significant negative relationship was observed between sexual satisfaction and marital satisfaction with the domestic violence was –0.42 and –0.61, respectively. Conclusion Considering the high prevalence of domestic violence and its significant relationship with marital satisfaction and sexual satisfaction in this study, interventions and counseling are recommended to increase marital satisfaction and sexual satisfaction and to reduce domestic violence during pregnancy.
DSRC Versus 4G-LTE For Connected Vehicle Applications: A Study on Field Experiments of Vehicular Communication Performance

Dedicated short-range communication (DSRC) and 4G-LTE are two widely used candidate schemes for Connected Vehicle (CV) applications. It is thus of great necessity to compare these two most viable communication standards and clarify which one can meet the requirements of most V2X scenarios with respect to road safety, traffic efficiency, and infotainment. To the best of our knowledge, almost all the existing studies on comparing the feasibility of DRSC or LTE in V2X applications use software-based simulations, which may not represent realistic constraints. In this paper, a Connected Vehicle test-bed is established, which integrates the DSRC roadside units, 4G-LTE cellular communication stations, and vehicular on-board terminals. Three Connected Vehicle application scenarios are set as Collision Avoidance, Traffic Text Message Broadcast, and Multimedia File Download, respectively. A software tool is developed to record GPS positions/velocities of the test vehicles and record certain wireless communication performance indicators. The experiments have been carried out under different conditions. According to our results, 4G-LTE is more preferred for the nonsafety applications, such as traffic information transmission, file download, or Internet accessing, which does not necessarily require the high-speed real-time communication, while for the safety applications, such as Collision Avoidance or electronic traffic sign, DSRC outperforms the 4G-LTE.
Interdomain Identity-Based Key Agreement Schemes

In order to simplify key management, two-party and three-party key agreement schemes based on user identities have been proposed recently. Multiparty (including more than three parties) key agreement protocols, which also are called conference key schemes, can be applied to distributed systems and wireless environments, such as ad hoc networks, for the purpose of multiparty secure communication. However, it is hard to extend two- or three-party schemes to multiparty ones with the guarantee of efficiency and security. In addition to the above two properties, interdomain environments should also be considered in key agreement systems due to diversified network domains. However, only few identity-based multiparty conference key agreement schemes for single domain environments and none for interdomain environments were proposed in the literature and they did not satisfy all of the security attributes such as forward secrecy and withstanding impersonation. In this paper, we will propose a novel efficient single domain identity-based multiparty conference key scheme and extend it to an interdomain one. Finally, we prove that the proposed schemes satisfy the required security attributes via formal methods.
A ring oscillator with high temperature independency

A novel temperature independent Ring Oscillator is proposed in this paper. In order to accomplish temperature independency, different characteristics of several delay stages are gathered together in one circuit scheme. Using the temperature property of one kind of delay stage to cancel the other's, has made the proposed architecture show drastically low temperature sensitivity. The proposed architecture was simulated in 0. 35µm CMOS technology where the temperature varied from 0 to 50 degrees Celsius, resulting in only 1% frequency deviations.
Comparative leaf morphology and anatomy of three Asteraceae species

ABSTRACT The objective of this paper was to describe and compare the morphology and anatomy of mature leaves of Mikania glomerata Spreng. , Porophyllum ruderale Cass. and Vernonia condensata Baker (Asteraceae) species that have different habits emphasizing their secretory structures. Longitudinal and transversal sections of mature leaf blades of the three species were analyzed at the apex, base, and medium third part of the midvein of the leaf blade and of the margin. M. glomerata had uniseriate glandular trichomes and secretory ducts; P. ruderale had hydathodes and secretory cavities; and V. condensata had idioblasts and uni- and biseriate glandular trichomes. Key words: Mikania glomerata, Porophyllum ruderale, Vernonia condensata, secretory structures, medicinal plants * Author for correspondence INTRODUCTION The Asteraceae family consists of approximately 25000 species (Barroso, 1986) included in over 1100 genera. These species frequently present herbaceous habits, although arboreous and voluble herbaceous habits also occur (Cronquist, 1981). Because of this variety of habits, the family presents various anatomical structures and in some cases ecological specialization may occur (Metcalfe and Chalk, 1950). Secretory structures are of great taxonomical interest and their restricted distribution has an important diagnosis value (Metcalfe and Chalk, 1950; Fahn, 1979). Frequently, in Asteraceae, they occupy distinct positions in different organs of the plant occurring in all, some or in only one organ (Solereder, 1908). Castro et al. (1997) reviewed the types of secretory structures in the leaves of seventy two representatives of the Asteraceae family from the cerrado vegetation in the Reserva Biologica de Mogi Guacu, Sao Paulo, Brazil. When analyzed together these secretory structures presented diagnosis value at genus level. Eight types of leaf secretory structures were mentioned: ducts, cavities, idioblasts, laticifers, hydathodes, extrafloral nectaries, trichomes and glandular appendixes. According to Metcalfe and Chalk (1950), anatomical diversity is commonly observed in the structure of leaves of species belonging to the Asteraceae. Among the features that vary are: (a) stomata distribution on leaf surfaces; (b) guard-cell positioning in relation to ordinary epidermal cells; (c) hypoderm development on the upper side of the leaf surface; (d) mesophyll and fibrovascular system differentiation; and (e) wax secretion on leaf surface (Solereder, 1908). The anatomical features that can be observed in Asteraceae are: (a) presence of various types of glandular or covering trichomes; (b) papillae on
A computational geometry method for the inverse scattering problem

In this paper we demonstrate a computational method to solve the inverse scattering problem for a star-shaped, smooth, penetrable obstacle in 2D. Our method is based on classical ideas from computational geometry. First, we approximate the support of a scatterer by a point cloud. Secondly, we use the Bayesian paradigm to model the joint conditional probability distribution of the non-convex hull of the point cloud and the constant refractive index of the scatterer given near field data. Of note, we use the non-convex hull of the point cloud as spline control points to evaluate, on a finer mesh, the volume potential arising in the integral equation formulation of the direct problem. Finally, in order to sample the arising posterior distribution, we propose a probability transition kernel that commutes with affine transformations of space. Our findings indicate that our method is reliable to retrieve the support and constant refractive index of the scatterer simultaneously. Indeed, our sampling method is robust to estimate a quantity of interest such as the area of the scatterer. We conclude pointing out a series of generalizations of our method.
Road analysis based on texture similarity evaluation

The paper presents an image processing algorithm based on statistical methods in order to evaluate the road delimiting by textured region similarity measurement and defect texture detection and localization. With the purpose of algorithm validation, the images are divided in sixteen equivalent regions. For the proper region identification and classification, a decision theoretic method and two types of statistic texture feature are used. The first type features derive from the medium co-occurrence matrices: contrast, energy, entropy, homogeneity, and variance, but in normalized form. The second type feature is the edge density per unit of area. The algorithms are implemented in Visual C++ and Matlab and allows the simultaneously display of both the investigated region, and the Euclidian distance between them and a reference image region. The basic texture (reference) is considered an asphalt one and the different textures are considered like the grass and the pebble. The result is the classification of the tested texture in road and non-road type, based on the similarity evaluation and the localization of the defect regions.
Impacts of Traffic Tidal Flow on Pollutant Dispersion in a Non-Uniform Urban Street Canyon

A three-dimensional geometrical model was established based on a section of street canyons in the 2nd Ring Road of Wuhan, China, and a mathematical model describing the fluid flow and pollutant dispersion characteristics in the street canyon was developed. The effect of traffic tidal flow was investigated based on the measurement results of the passing vehicles as the pollution source of the CFD method and on the spatial distribution of pollutants under various ambient crosswinds. Numerical investigation results indicated that: (i) in this three-dimensional asymmetrical shallow street canyon, if the pollution source followed a non-uniform distribution due to the traffic tidal flow and the wind flow was perpendicular to the street, a leeward side source intensity stronger than the windward side intensity would cause an expansion of the pollution space even if the total source in the street is equal. When the ambient wind speed is 3 m/s, the pollutant source intensity near the leeward side that is stronger than that near the windward side (R = 2, R = 3, and R = 5) leads to an increased average concentration of CO at pedestrian breathing height by 26%, 37%, and 41%, respectively. (R is the ratio parameter of the left side pollution source and the right side pollution source); (ii) However, this feature will become less significant with increasing wind speeds and changes of wind direction; (iii) the pollution source intensity exerted a decisive influence on the pollutant level in the street canyon. With the decrease of the pollution source intensity, the pollutant concentration decreased proportionally.