Miracle-dz/UniFAR-FTUs huggingface dataset:
Performance of Channel Estimation in MIMO-OFDM Systems

This paper presented the performance of faded channel estimation method on orthogonal frequency division multiplexing-multiple input multiple outputs (OFDM-MIMO) i.e. least squares (LS) and minimum mean squared error (MMSE). Channel impuls response (CIR) was required to overcome the intersymbol interference (ISI). Channel impuls response information was obtained from channel estimation processing. Iterance simulation used monte-carlo technique to determine the performance of bit error rate (BER) and mean squared error (MSE). Simulation results show that the mean squared error performance on MIMO system was better than the SISO system. On MMSE channel estimation, the MIMO 2Tx-2Rx system provided ± 2 dB improvement that compared to SISO system at value of MSE 10 -2 . Furthermore,MIMO 3Tx-2Rx produce improvement about 1.5 dB, MIMO 4Tx-2Rx improve about 3.5 dB at BER 10-4,respectively.The MIMO 2Tx-2Rx system, MMSE channel estimation produced better performance ± 1 dB than LS channel estimation with sufficient SNR value for MSE 10 -2 . Pilot arrangement, the simulation results show that the block type-pilot arrangement produced better performance than the comb type-pilot arrangement at fast fading channel. Block type-pilot arrangement system produced better ± 10 dB than the comb type-pilot arrangement with MMSE method at value of BER 2 10 -2 .
Quantitative User Perceptions of Music Recommendation List Diversity

Diversity is known to play an important role in recommender systems. However, its relationship to users and their satisfaction is not well understood, especially in the music domain. We present a user study: 92 participants were asked to evaluate personalized recommendation lists at varying levels of diversity. Recommendations were generated by two different collaborative ﬁltering methods, and diversiﬁed in three different ways, one of which is a simple and novel method based on genre ﬁltering. All diversiﬁed lists were recognised by users to be more diverse, and this diversiﬁcation increased overall recommendation list satisfaction. Our simple ﬁltering approach was also successful at tailoring diversity to some users. Within the collaborative ﬁltering framework, however, we were not able to generate enough diversity to match all user preferences. Our results highlight the need to diversify in music recommendation lists, even when it comes at the cost of "accuracy".
Modeling and Design of Tracked Mobile Climbing Robots on Non-Planar Surfaces

: This paper will present an analysis of a tracked-based skid steer mobile robot (SSMR) following a defined path on a class of non-planar surfaces. The analysis will define a method to approximate the position and orientation of each track on a climbing surface in a manner that ensures opposing, symmetric components of the robot are geometrically even in their positioning relative to the base surface. The analysis will assume the robot chassis travels along the path with an orientation defined by the vectors tangent to the path and normal to the climbing surface, and that the centerline distance and longitudinal displacements between the tracks units are fixed. It will be shown that for general paths, three rotational degrees of freedom are required between the tracks to maintain line contact with the surface along the length of the track. This implies that the tracks do not remain parallel while following paths on non-planar surfaces. It will further be shown that relative lateral slipping between the left and right tracks result when traversing non-planar surfaces. Two subsets of paths are shown to require one rotational degree of freedom only and avoid lateral slipping. The model will then be used to define the required relative motion between the tracks which can be used to design a kinematic arrangement for connecting track modules to a central chassis in a manner to minimize slip and maximize surface contact when climbing on non-planar surfaces.
Environmental ethics in Islam: principles, violations, and future perspectives

The aggressive manipulation of the natural resources in Kuwait and the destruction of the southern Arab marshes in Iraq, are two recent environmental disasters in the Arabian Gulf region. This paper elaborates some important principles of environmental ethics in Islam and shows some examples for which development of new Islamic thoughts in environmental ethics seems to be essential. As there are common futures with shared possibilities and common threats with equivalent adverse outcomes, the whole process of self‐correction needs the input of the West and of Christian views on the environment also. Given the global impact of the environmental crisis, international cooperation is urgently needed to avert environmental dangers which need not arise and environmental dangers which already exist but which must be mitigated and avoided.
Morphological aspects of the tissues of the 140-year-old embalmed body of N.I. Pirogov

4Department of Human Anatomy, National Pirogov Memorial Medical University, The Ministry of Healthcare of Ukraine, Vinnytsya, 21018, Ukraine ABSTRACT: Professor Nikolay Ivanovich Pirogov (1810-1881) was an anatomist, surgeon, and scientist. He studied in Moscow and Berlin, and was one of the founders of modern surgery and aseptic procedures. He described the use of plaster for the treatment of fractures, and the use of ether as an anesthetic in combat medicine. He published a number of papers on anatomy and surgery. He died on December 5, 1881, of oral cancer. His body was embalmed by anatomist Professor David Ilyich Vyvodstev (18301896), and placed in a tomb in the Church of St. Nicholas in Vinnytsia, Ukraine. The first inspection of the body was performed by a commission of experts in 1927. This was followed by several re-embalmings of the body in the 1950s and 1980s by a team led by Professor Rafail Davidovich Sinelnikov (1896-1981), and several other procedures in the 1980s and 1990s by experts from Moscow's V.I. Lenina, (now VILAR: All-Russian Research Institute of Medicinal and Aromatic Plants), until 2011. In 2017, regular care of the body was taken over by Ukrainian scientists, who, in 2018, performed all tissue and fluid analyses to determine the body’s state of preservation, and subsequent reembalmings. The results of microscopic and ultramicroscopic analysis showed some destructive changes in skin, skeletal muscle, and bone tissues. Despite these changes, however, the tissues of the body are relatively well preserved.
Google Cloud and YouTube-8M Video Understanding Challenge

In this project, we implemented and evaluated a range of deep learning architectures (both frame-level models and video-level models) to tackle the Google Cloud and Youtube-8M video understanding challenge (‘YT-8M challenge’), a multi-label video classification challenge based on the recently released Youtube-8M V2 dataset. Our best performing architecture was a novel residual network trained on video-level features that achieves a test set GAP of 0.801, which placed in the top 20% in the YT-8M challenge. The residual network outperformed our LSTM model, suggesting that well-designed video-level models can outperform frame-level ones and / or learning temporal cues is difficult. In addition, audio features were found to be important to video classification, materially improving model classification performance.
MODULATION, CODING AND SIGNAL PROCESSING FOR WIRELESS COMMUNICATIONS

ireless communications systems of the future, such as fourth generation (4G), will provide networked multimedia communications, will be characterized by very high data rates of up to 1 Gb/s or more, and will operate in environments rich in multi-user interference. The high data rates inevitably give rise to severe frequency selectivity and multipath interference in the wireless channels. Multipath channels pose many challenging signal processing problems for designers of high-performance receivers. Transmission techniques that can overcome channel selectivity, such as code-division multiple access (CDMA) and orthogonal frequency-division multiplexing (OFDM), are being intensely investigated. At the same time, however, the scattering-rich environment engendered by the presence of multiple propagation paths leads to tremendous potential diversity gains that can be exploited through the use of suitable transmission/reception strategies such as multiple-input multiple-output (MIMO) techniques. In addition, MIMO systems may yield a rate gain, thanks to their ability to generate a multiplicity of parallel channels. Space-time coding schemes allowing one to benefit from multipath diversity to increase the capacity of wireless channels are now well understood and established. While multipath propagation problems seem to have been largely overcome by these recent advances, the capacity of the network still seems ultimately limited by interference caused by the presence of multiple users simultaneously trying to access network resources. Multi-user interference cancellation on multipath channels presents even greater challenges in signal processing. This special issue provides an up-to-date survey on key physical layer technologies for realizing future wireless communications systems. The group of articles presented in this issue begins with an invited article by F. Adachi et al. It presents in a tutorial manner the state of the art in the research on broadband CDMA techniques for high-speed wireless access. Both direct-sequence CDMA (DS-CDMA) and multicarrier CDMA (MC-CDMA) are covered, together with the frequency domain equalization (FDE) techniques that are essential for the receiver in both cases. While MC-CDMA has been the preferred technique, it is now realized that DS-CDMA with FDE has comparable error performance. The authors argue that both MC- and DSCDMA are equally promising broadband access methods for 4G systems. The second article, by J. Andrews, presents an overview of interference cancellation for cellular systems. It explains why the current generation of wireless receivers has not widely embraced multi-user interference cancellation, despite the performance improvements promised by the latter, as documented by the enormous amount of research over the last two decades. While today’s receivers, by and large, treat interference as background noise, this article argues that current and future trends will increase the need for and viability of multi-user receivers for both the uplink and downlink. Downlink interference cancellation
Understanding and Predicting Retractions of Published Work

Recent increases in the number of retractions of published papers reﬂect heightened attention and increased scrutiny in the scientiﬁc process motivated, in part, by the replication crisis. These trends motivate computational tools for understanding and assessment of the scholarly record. Here, we sketch the landscape of retracted papers in the Retraction Watchdatabase,acollectionof19krecordsofpublishedschol-arlyarticlesthathavebeenretractedforvariousreasons(e.g., plagiarism,dataerror). Usingmetadataaswellasfeaturesderivedfromfull-textforasubsetofretractedpapersinthe socialandbehavioralsciences,wedeveloparandomforestclassiﬁertopredictretractioninnewsampleswith73%accu-racyandF1-scoreof71%. Webelievethisstudytobetheﬁrstofitskindtodemonstratetheutilityofmachinelearningasa toolfortheassessmentofretractedwork.
Deep Learning on Supercomputers

The Deep Learning (DL) on Supercomputers workshop provides a forum for practitioners working on any and all aspects of DL for science and engineering in the High Performance Computing (HPC) context to present their latest research results and development, deployment, and application experiences. The general theme of this workshop series is the intersection of DL and HPC; the theme of this particular workshop is the applications of DL methods in science and engineering: novel uses of DL methods, e.g., convolutional neural networks (CNN), recurrent neural networks (RNN), generative adversarial networks (GAN), and reinforcement learning (RL), in the natural sciences, social sciences, and engineering, to enhance innovative applications of DL in traditional numerical computation. Its scope encompasses application development in scientiﬁc scenarios using HPC platforms; DL methods applied to numerical simulation; fundamental algorithms, enhanced procedures, and software development methods to enable scalable training and inference; hardware changes with impact on future supercomputer design; and machine deployment, performance evaluation, and reproducibility practices for DL applications with an emphasis on scientiﬁc usage. This workshop will be centered around published papers. Submissions will be peer-reviewed, and accepted papers will be published as part of the Joint Workshop Proceedings by Springer. Topics include but are not limited to
Teaching Fundamentals of Digital Logic Design and VLSI Design Using Computational Textiles

This thesis presents teaching fundamentals of digital logic design and VLSI design for freshmen and even for high school students using e-textiles. This easily grabs attention of students as it is creative and interesting. Using e-textiles to project these concepts would be easily understood by students at young age. This involves stitching electronic circuits on a fabric using basic components like LEDs, push buttons and so on. The functioning of these circuits is programmed in Lilypad Arduino. By using this method, students get exposed to basic electronic concepts at early stage which eventually develops interest towards engineering field.
LiFiAd HocNetworkSecurity using aMicroring Transceiver

: This paper proposes a new wireless ad-hoc network security system by quantum cryptography using a graphene ring resonator system as a quantum-processor. To increase the channel capacity and security, the multiplexer is operated incorporating a quantum processing unit via an optical multiplexer. The system consists of two parts, where firstly, the transmission part, generates the quantum codes within the graphene resonators, which is formed by a modified optical add/drop filter, secondly, the receiver part can be communicated by using the quantum key (quantum bit, qubit) via a quantum processors, in which the quantum transceiver is formed. In operation, the reference states can be recognized by using the cloning unit, which is operated by the add/drop filter, where the communication between Sender (Alice) and Receiver (Bob) can be performed. Such a proposed system is formed by using the laser source, which is known as a light fidelity(LiFi) technique. Results obtained have shown that the correlated photons can be generated and formed the entangled photon pair, which is allowed to form the secret key between Alice and Bob. In application, the embedded system within the computer processing unit is available for the quantum computer. Furthermore, such a concept is also available for hybrid communications, which can be used to form the wireless ad-hoc network security system, which is discussed in details.
Diagnostic value of two HIV rapid diagnostic tests 16 years after their adoption in national strategies in the Central African Republic (CAR)

1 Laboratoire National de Biologie Clinique et de Santé Publique, Bangui, Central African Republic. 2 Faculté des Sciences de la Santé, Université de Bangui, Bangui, Central African Republic. 3 Ecole doctorale des Sciences et Techniques, Faculté des Sciences, Université de Bangui, Bangui, Central African Republic. 4 Laboratoire de Bactériologie-Virologie du Centre Hospitalier Universitaire de Brazzaville, Republic of Congo. 5 Faculté des Sciences de la Santé de l’Université Marien NGOUABI de Brazzaville, Republic of Congo.
Low-power variable-length fast Fourier transform processor

Fast Fourier transform (FFT) processing is one of the key procedures in the popular orthogonal frequency division multiplexing (OFDM) communication systems. Structured pipeline architectures and low power consumption are the main concerns for its VLSI implementation. In the paper, the authors report a variable-length FFT processor design that is based on a radix-2/4/8 algorithm and a single-path delay feedback architecture. The processor can be used in various OFDM-based communication systems, such as digital audio broadcasting (DAB), digital video broadcasting-terrestrial (DVB-T), asymmetric digital subscriber loop (ADSL) and very-high-speed digital subscriber loop (VDSL). To reduce power consumption and chip area, special current-mode SRAMs are adopted to replace shift registers in the delay lines. In addition, techniques including complex multipliers containing three real multiplications, and reduced sine/cosine tables are adopted. The chip is fabricated using a 0.35 /spl mu/m CMOS process and it measures 3900 /spl mu/m /spl times/ 5500 /spl mu/m. According to the measured results, the 2048-point FFT operation can function correctly up to 45 MHz with a 3.3 V supply voltage and power consumption of 640 mW. In low-power operation, when the supply voltage is scaled down to 2.3 V, the processor consumes 176 mW when it runs at 17.8 MHz.
Ago-RIP Sequencing Identifies New MicroRNA-449a-5p Target Genes Increasing Sorafenib Efficacy in Hepatocellular Carcinoma

BACKGROUND: Patients with hepatocellular carcinoma (HCC) have very limited treatment options. For the last fourteen years, the multi-tyrosine kinase inhibitor sorafenib has been used as standard-of-care therapeutic agent in advanced HCC. Unfortunately, drug resistance develops in many cases. Therefore, we aimed to find a way to mitigate drug resistance and to improve the sorafenib efficacy in HCC cells. MicroRNAs play a significant role in targeting genes involved in tumor control suggesting microRNA/sorafenib combination therapy as a promising treatment option in advanced HCC. METHODS: MiR-449a-5p target genes were identified by Ago-RIP sequencing and validated by luciferase reporter assays and expression analyses. Target gene expression and survival data were analyzed in public HCC datasets. Tumor-relevant functional effects of miR-449a-5p and its target genes as well as their impact on the effects of sorafenib were analyzed using in vitro assays. An indirect transwell co-culture system was used to survey anti-angiogenic effects of miR-449a-5p. RESULTS: PEA15, PPP1CA and TUFT1 were identified as direct target genes of miR-449a-5p. Overexpression of these genes correlated with a poor outcome of HCC patients. Transfection with miR-449a-5p and repression of miR-449a-5p target genes inhibited cell proliferation and angiogenesis, induced apoptosis and reduced AKT and ERK signaling in HLE and Huh7 cells. Importantly, miR-449a-5p potentiated the efficacy of sorafenib in HCC cells via downregulation of PEA15, PPP1CA and TUFT1. CONCLUSIONS: This study provides detailed insights into the targetome and regulatory network of miR-449a-5p. Our results demonstrate for the first time that targeting PEA15, PPP1CA and TUFT1 via miR-449a overexpression could have significant implications in counteracting sorafenib resistance suggesting miR-449a-5p as a promising candidate for a microRNA/sorafenib combination therapy.
2006 Australasian Road Safety Research Policing and Education Conference Integration of work-related fleet safety within a Workplace Health and Safety Management System: A case study approach

This paper reports the findings of a research project initiated to assess work-related fleet safety issues in a state government organisation. In particular, special attention is given to identifying fleet safety factors for integration into a wider Workplace Health and Safety Management System (WHSMS). This exploratory case study was carried out across five regional areas, within the state of Queensland, and involved two major components: i) field based interviews; and ii) an analysis of organisational fleet safety operational procedures. Face-to-face interviews (n=146) were conducted with a wide range of staff, using a semistructured questionnaire. The analysis of fleet safety procedures focussed on work-related vehicle incident reporting, identification of hazard and risk exposures, effectiveness of training and induction programs, and analysis of current safety management systems including policy and procedures. Results of the study found that fleet safety within the organisation was not considered a priority and as a result, the full extent of organisational crashes and vehicle-related injuries was relatively unknown by senior management. In addition, this study identified a number of operational and procedural deficiencies in relation to fleet safety. This paper will further outline the major findings of the study and propose recommendations directed at improving fleet safety within organisations as well as integration of fleet safety within a WHSMS.
CollageNet: Fusing arbitrary melody and accompaniment into a coherent song

When writing pop or hip-hop music, musicians sometimes sample from other songs and fuse the samples into their own music. We propose a new task in the symbolic music domain that is similar to the music sampling practice and a neural network model named CollageNet to fulﬁll this task. Speciﬁcally, given a piece of melody and an irrelevant ac-companiment with the same length, we fuse them into harmonic two-track music after some necessary changes to the inputs. Besides, users are involved in the fusion process by providing controls to the amount of changes along several disentangled musical aspects: rhythm and pitch of the melody, and chord and texture of the accompaniment. We conduct objective and subjective experiments to demonstrate the validity of our model. Experimental results con-ﬁrm that our model achieves signiﬁcantly higher level of harmony than rule-based and data-driven baseline meth-ods. Furthermore, the musicality of each of the tracks does not deteriorate after the transformation applied by Colla-geNet, which is also superior to the two baselines. 1
A watt balance based on a simultaneous measurement scheme

The International Bureau of Weights and Measures (BIPM) is developing a novel watt balance based on a simultaneous measurement scheme for the forthcoming redefinition of the kilogram. The two distinct measurement phases in a conventional watt balance are carried out in a single phase where all quantities are measured simultaneously. The main characteristics of this simultaneous measurement approach are described. An analysis of the advantages and the drawbacks is carried out.
The Aggregate Impact of Consumer Reviews on Market Outcome in Differentiated Products Market

We investigate the aggregate impact of consumer reviews on market outcome in a differentiated product category. We model consumers as Bayesian learners who use online consumer reviews to learn and update their beliefs on product quality before their choice. For our empirical analysis, we use aggregate-level, longitudinal data from Amazon.com in the digital camcorder category and estimate the demand parameters. Using model estimates, we conduct two simulation studies and quantify the impact of consumer reviews on the market outcome. We report that the products experience heterogenous market share changes: the standard deviation of market share changes across products and time is 16.7%, ranging from ¡40% to 20%. In addition, consistent with the previous findings in experience goods, the marginal effect of low consumer ratings is greater than that of high consumer ratings. We discuss model limitations and offer directions for further research.